Create a common API for test managed resources like memory and test objects. A lot of times a test will want to set up infrastructure to be used in test cases; this could be anything from just wanting to allocate some memory to setting up a driver stack; this defines facilities for creating "test resources" which are managed by the test infrastructure and are automatically cleaned up at the conclusion of the test.

Signed-off-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com Reviewed-by: Stephen Boyd sboyd@kernel.org --- include/kunit/test.h | 187 +++++++++++++++++++++++++++++++++++++++++++ kunit/test.c | 163 +++++++++++++++++++++++++++++++++++++ 2 files changed, 350 insertions(+)

diff --git a/include/kunit/test.h b/include/kunit/test.h index e0b34acb9ee4e..f264ffe58f008 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -9,8 +9,72 @@ #ifndef _KUNIT_TEST_H #define _KUNIT_TEST_H

+#include <linux/slab.h> #include <linux/types.h>

+struct kunit_resource; + +typedef int (*kunit_resource_init_t)(struct kunit_resource *, void *); +typedef void (*kunit_resource_free_t)(struct kunit_resource *); + +/** + * struct kunit_resource - represents a *test managed resource* + * @allocation: for the user to store arbitrary data. + * @free: a user supplied function to free the resource. Populated by + * kunit_alloc_resource(). + * + * Represents a *test managed resource*, a resource which will automatically be + * cleaned up at the end of a test case. + * + * Example: + * + * .. code-block:: c + * + * struct kunit_kmalloc_params { + * size_t size; + * gfp_t gfp; + * }; + * + * static int kunit_kmalloc_init(struct kunit_resource *res, void *context) + * { + * struct kunit_kmalloc_params *params = context; + * res->allocation = kmalloc(params->size, params->gfp); + * + * if (!res->allocation) + * return -ENOMEM; + * + * return 0; + * } + * + * static void kunit_kmalloc_free(struct kunit_resource *res) + * { + * kfree(res->allocation); + * } + * + * void *kunit_kmalloc(struct kunit *test, size_t size, gfp_t gfp) + * { + * struct kunit_kmalloc_params params; + * struct kunit_resource *res; + * + * params.size = size; + * params.gfp = gfp; + * + * res = kunit_alloc_resource(test, kunit_kmalloc_init, + * kunit_kmalloc_free, &params); + * if (res) + * return res->allocation; + * + * return NULL; + * } + */ +struct kunit_resource { + void *allocation; + kunit_resource_free_t free; + + /* private: internal use only. */ + struct list_head node; +}; + struct kunit;

/** @@ -109,6 +173,13 @@ struct kunit { * have terminated. */ bool success; /* Read only after test_case finishes! */ + spinlock_t lock; /* Guards all mutable test state. */ + /* + * Because resources is a list that may be updated multiple times (with + * new resources) from any thread associated with a test case, we must + * protect it with some type of lock. + */ + struct list_head resources; /* Protected by lock. */ };

void kunit_init_test(struct kunit *test, const char *name); @@ -141,6 +212,122 @@ int kunit_run_tests(struct kunit_suite *suite); } \ late_initcall(kunit_suite_init##suite)

+/* + * Like kunit_alloc_resource() below, but returns the struct kunit_resource + * object that contains the allocation. This is mostly for testing purposes. + */ +struct kunit_resource *kunit_alloc_and_get_resource(struct kunit *test, + kunit_resource_init_t init, + kunit_resource_free_t free, + gfp_t internal_gfp, + void *context); + +/** + * kunit_alloc_resource() - Allocates a *test managed resource*. + * @test: The test context object. + * @init: a user supplied function to initialize the resource. + * @free: a user supplied function to free the resource. + * @internal_gfp: gfp to use for internal allocations, if unsure, use GFP_KERNEL + * @context: for the user to pass in arbitrary data to the init function. + * + * Allocates a *test managed resource*, a resource which will automatically be + * cleaned up at the end of a test case. See &struct kunit_resource for an + * example. + * + * NOTE: KUnit needs to allocate memory for each kunit_resource object. You must + * specify an @internal_gfp that is compatible with the use context of your + * resource. + */ +static inline void *kunit_alloc_resource(struct kunit *test, + kunit_resource_init_t init, + kunit_resource_free_t free, + gfp_t internal_gfp, + void *context) +{ + struct kunit_resource *res; + + res = kunit_alloc_and_get_resource(test, init, free, internal_gfp, + context); + + if (res) + return res->allocation; + + return NULL; +} + +typedef bool (*kunit_resource_match_t)(struct kunit *test, + const void *res, + void *match_data); + +/** + * kunit_resource_instance_match() - Match a resource with the same instance. + * @test: Test case to which the resource belongs. + * @res: The data stored in kunit_resource->allocation. + * @match_data: The resource pointer to match against. + * + * An instance of kunit_resource_match_t that matches a resource whose + * allocation matches @match_data. + */ +static inline bool kunit_resource_instance_match(struct kunit *test, + const void *res, + void *match_data) +{ + return res == match_data; +} + +/** + * kunit_resource_destroy() - Find a kunit_resource and destroy it. + * @test: Test case to which the resource belongs. + * @match: Match function. Returns whether a given resource matches @match_data. + * @free: Must match free on the kunit_resource to free. + * @match_data: Data passed into @match. + * + * Free the latest kunit_resource of @test for which @free matches the + * kunit_resource_free_t associated with the resource and for which @match + * returns true. + * + * RETURNS: + * 0 if kunit_resource is found and freed, -ENOENT if not found. + */ +int kunit_resource_destroy(struct kunit *test, + kunit_resource_match_t match, + kunit_resource_free_t free, + void *match_data); + +/** + * kunit_kmalloc() - Like kmalloc() except the allocation is *test managed*. + * @test: The test context object. + * @size: The size in bytes of the desired memory. + * @gfp: flags passed to underlying kmalloc(). + * + * Just like `kmalloc(...)`, except the allocation is managed by the test case + * and is automatically cleaned up after the test case concludes. See &struct + * kunit_resource for more information. + */ +void *kunit_kmalloc(struct kunit *test, size_t size, gfp_t gfp); + +/** + * kunit_kfree() - Like kfree except for allocations managed by KUnit. + * @test: The test case to which the resource belongs. + * @ptr: The memory allocation to free. + */ +void kunit_kfree(struct kunit *test, const void *ptr); + +/** + * kunit_kzalloc() - Just like kunit_kmalloc(), but zeroes the allocation. + * @test: The test context object. + * @size: The size in bytes of the desired memory. + * @gfp: flags passed to underlying kmalloc(). + * + * See kzalloc() and kunit_kmalloc() for more information. + */ +static inline void *kunit_kzalloc(struct kunit *test, size_t size, gfp_t gfp) +{ + return kunit_kmalloc(test, size, gfp | __GFP_ZERO); +} + +void kunit_cleanup(struct kunit *test); + void __printf(3, 4) kunit_printk(const char *level, const struct kunit *test, const char *fmt, ...); diff --git a/kunit/test.c b/kunit/test.c index d3dda359f99b1..68b1037ab74d0 100644 --- a/kunit/test.c +++ b/kunit/test.c @@ -122,6 +122,8 @@ static void kunit_print_test_case_ok_not_ok(struct kunit_case *test_case,

void kunit_init_test(struct kunit *test, const char *name) { + spin_lock_init(&test->lock); + INIT_LIST_HEAD(&test->resources); test->name = name; test->success = true; } @@ -153,6 +155,8 @@ static void kunit_run_case(struct kunit_suite *suite, if (suite->exit) suite->exit(&test);

+ kunit_cleanup(&test); + test_case->success = test.success; }

@@ -173,6 +177,165 @@ int kunit_run_tests(struct kunit_suite *suite) return 0; }

+struct kunit_resource *kunit_alloc_and_get_resource(struct kunit *test, + kunit_resource_init_t init, + kunit_resource_free_t free, + gfp_t internal_gfp, + void *context) +{ + struct kunit_resource *res; + int ret; + + res = kzalloc(sizeof(*res), internal_gfp); + if (!res) + return NULL; + + ret = init(res, context); + if (ret) + return NULL; + + res->free = free; + spin_lock(&test->lock); + list_add_tail(&res->node, &test->resources); + spin_unlock(&test->lock); + + return res; +} + +static void kunit_resource_free(struct kunit *test, struct kunit_resource *res) +{ + res->free(res); + kfree(res); +} + +static struct kunit_resource *kunit_resource_find(struct kunit *test, + kunit_resource_match_t match, + kunit_resource_free_t free, + void *match_data) +{ + struct kunit_resource *resource; + + lockdep_assert_held(&test->lock); + + list_for_each_entry_reverse(resource, &test->resources, node) { + if (resource->free != free) + continue; + if (match(test, resource->allocation, match_data)) + return resource; + } + + return NULL; +} + +static struct kunit_resource *kunit_resource_remove( + struct kunit *test, + kunit_resource_match_t match, + kunit_resource_free_t free, + void *match_data) +{ + struct kunit_resource *resource; + + spin_lock(&test->lock); + resource = kunit_resource_find(test, match, free, match_data); + if (resource) + list_del(&resource->node); + spin_unlock(&test->lock); + + return resource; +} + +int kunit_resource_destroy(struct kunit *test, + kunit_resource_match_t match, + kunit_resource_free_t free, + void *match_data) +{ + struct kunit_resource *resource; + + resource = kunit_resource_remove(test, match, free, match_data); + + if (!resource) + return -ENOENT; + + kunit_resource_free(test, resource); + return 0; +} + +struct kunit_kmalloc_params { + size_t size; + gfp_t gfp; +}; + +static int kunit_kmalloc_init(struct kunit_resource *res, void *context) +{ + struct kunit_kmalloc_params *params = context; + + res->allocation = kmalloc(params->size, params->gfp); + if (!res->allocation) + return -ENOMEM; + + return 0; +} + +static void kunit_kmalloc_free(struct kunit_resource *res) +{ + kfree(res->allocation); +} + +void *kunit_kmalloc(struct kunit *test, size_t size, gfp_t gfp) +{ + struct kunit_kmalloc_params params = { + .size = size, + .gfp = gfp + }; + + return kunit_alloc_resource(test, + kunit_kmalloc_init, + kunit_kmalloc_free, + gfp, + &params); +} + +void kunit_kfree(struct kunit *test, const void *ptr) +{ + int rc; + + rc = kunit_resource_destroy(test, + kunit_resource_instance_match, + kunit_kmalloc_free, + (void *)ptr); + + WARN_ON(rc); +} + +void kunit_cleanup(struct kunit *test) +{ + struct kunit_resource *resource; + + /* + * test->resources is a stack - each allocation must be freed in the + * reverse order from which it was added since one resource may depend + * on another for its entire lifetime. + * Also, we cannot use the normal list_for_each constructs, even the + * safe ones because *arbitrary* nodes may be deleted when + * kunit_resource_free is called; the list_for_each_safe variants only + * protect against the current node being deleted, not the next. + */ + while (true) { + spin_lock(&test->lock); + if (list_empty(&test->resources)) { + spin_unlock(&test->lock); + break; + } + resource = list_last_entry(&test->resources, + struct kunit_resource, + node); + list_del(&resource->node); + spin_unlock(&test->lock); + + kunit_resource_free(test, resource); + } +} + void kunit_printk(const char *level, const struct kunit *test, const char *fmt, ...)

Add support for expectations, which allow properties to be specified and then verified in tests.

Signed-off-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com Reviewed-by: Stephen Boyd sboyd@kernel.org --- include/kunit/test.h | 834 ++++++++++++++++++++++++++++++++++++++++++- kunit/test.c | 62 ++++ 2 files changed, 893 insertions(+), 3 deletions(-)

diff --git a/include/kunit/test.h b/include/kunit/test.h index f264ffe58f008..4c41e6bde1588 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -9,6 +9,8 @@ #ifndef _KUNIT_TEST_H #define _KUNIT_TEST_H

+#include <kunit/assert.h> +#include <linux/kernel.h> #include <linux/slab.h> #include <linux/types.h>

@@ -341,7 +343,7 @@ void __printf(3, 4) kunit_printk(const char *level, * a variable number of format parameters just like printk(). */ #define kunit_info(test, fmt, ...) \ - kunit_printk(KERN_INFO, test, fmt, ##__VA_ARGS__) + kunit_printk(KERN_INFO, test, fmt, ##__VA_ARGS__)

/** * kunit_warn() - Prints a WARN level message associated with the current test. @@ -351,7 +353,7 @@ void __printf(3, 4) kunit_printk(const char *level, * Prints a warning level message. */ #define kunit_warn(test, fmt, ...) \ - kunit_printk(KERN_WARNING, test, fmt, ##__VA_ARGS__) + kunit_printk(KERN_WARNING, test, fmt, ##__VA_ARGS__)

/** * kunit_err() - Prints an ERROR level message associated with the current test. @@ -361,6 +363,832 @@ void __printf(3, 4) kunit_printk(const char *level, * Prints an error level message. */ #define kunit_err(test, fmt, ...) \ - kunit_printk(KERN_ERR, test, fmt, ##__VA_ARGS__) + kunit_printk(KERN_ERR, test, fmt, ##__VA_ARGS__) + +/** + * KUNIT_SUCCEED() - A no-op expectation. Only exists for code clarity. + * @test: The test context object. + * + * The opposite of KUNIT_FAIL(), it is an expectation that cannot fail. In other + * words, it does nothing and only exists for code clarity. See + * KUNIT_EXPECT_TRUE() for more information. + */ +#define KUNIT_SUCCEED(test) do {} while (0) + +void kunit_do_assertion(struct kunit *test, + struct kunit_assert *assert, + bool pass, + const char *fmt, ...); + +#define KUNIT_ASSERTION(test, pass, assert_class, INITIALIZER, fmt, ...) do { \ + struct assert_class __assertion = INITIALIZER; \ + kunit_do_assertion(test, \ + &__assertion.assert, \ + pass, \ + fmt, \ + ##__VA_ARGS__); \ +} while (0) + + +#define KUNIT_FAIL_ASSERTION(test, assert_type, fmt, ...) \ + KUNIT_ASSERTION(test, \ + false, \ + kunit_fail_assert, \ + KUNIT_INIT_FAIL_ASSERT_STRUCT(test, assert_type), \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_FAIL() - Always causes a test to fail when evaluated. + * @test: The test context object. + * @fmt: an informational message to be printed when the assertion is made. + * @...: string format arguments. + * + * The opposite of KUNIT_SUCCEED(), it is an expectation that always fails. In + * other words, it always results in a failed expectation, and consequently + * always causes the test case to fail when evaluated. See KUNIT_EXPECT_TRUE() + * for more information. + */ +#define KUNIT_FAIL(test, fmt, ...) \ + KUNIT_FAIL_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_UNARY_ASSERTION(test, \ + assert_type, \ + condition, \ + expected_true, \ + fmt, \ + ...) \ + KUNIT_ASSERTION(test, \ + !!(condition) == !!expected_true, \ + kunit_unary_assert, \ + KUNIT_INIT_UNARY_ASSERT_STRUCT(test, \ + assert_type, \ + #condition, \ + expected_true), \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_TRUE_MSG_ASSERTION(test, assert_type, condition, fmt, ...) \ + KUNIT_UNARY_ASSERTION(test, \ + assert_type, \ + condition, \ + true, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_TRUE_ASSERTION(test, assert_type, condition) \ + KUNIT_TRUE_MSG_ASSERTION(test, assert_type, condition, NULL) + +#define KUNIT_FALSE_MSG_ASSERTION(test, assert_type, condition, fmt, ...) \ + KUNIT_UNARY_ASSERTION(test, \ + assert_type, \ + condition, \ + false, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_FALSE_ASSERTION(test, assert_type, condition) \ + KUNIT_FALSE_MSG_ASSERTION(test, assert_type, condition, NULL) + +#define KUNIT_BINARY_CLASS \ + kunit_binary_assert, KUNIT_INIT_BINARY_ASSERT_STRUCT +#define KUNIT_BINARY_PTR_CLASS \ + kunit_binary_ptr_assert, KUNIT_INIT_BINARY_PTR_ASSERT_STRUCT + +/* + * A factory macro for defining the assertions and expectations for the basic + * comparisons defined for the built in types. + * + * Unfortunately, there is no common type that all types can be promoted to for + * which all the binary operators behave the same way as for the actual types + * (for example, there is no type that long long and unsigned long long can + * both be cast to where the comparison result is preserved for all values). So + * the best we can do is do the comparison in the original types and then coerce + * everything to long long for printing; this way, the comparison behaves + * correctly and the printed out value usually makes sense without + * interpretation, but can always be interpreted to figure out the actual + * value. + */ +#define KUNIT_BASE_BINARY_ASSERTION(test, \ + assert_class, \ + ASSERT_CLASS_INIT, \ + assert_type, \ + left, \ + op, \ + right, \ + fmt, \ + ...) \ +do { \ + typeof(left) __left = (left); \ + typeof(right) __right = (right); \ + ((void)__typecheck(__left, __right)); \ + \ + KUNIT_ASSERTION(test, \ + __left op __right, \ + assert_class, \ + ASSERT_CLASS_INIT(test, \ + assert_type, \ + #op, \ + #left, \ + __left, \ + #right, \ + __right), \ + fmt, \ + ##__VA_ARGS__); \ +} while (0) + +#define KUNIT_BINARY_ASSERTION(test, assert_type, left, op, right, fmt, ...) \ + KUNIT_BASE_BINARY_ASSERTION(test, \ + kunit_binary_assert, \ + KUNIT_INIT_BINARY_ASSERT_STRUCT, \ + assert_type, \ + left, \ + op, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BASE_EQ_MSG_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_BINARY_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, ==, right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BASE_NE_MSG_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_BINARY_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, !=, right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BASE_LT_MSG_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_BINARY_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, <, right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BASE_LE_MSG_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_BINARY_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, <=, right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BASE_GT_MSG_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_BINARY_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, >, right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BASE_GE_MSG_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_BINARY_ASSERTION(test, \ + ASSERT_CLASS, \ + assert_type, \ + left, >=, right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_EQ_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ + KUNIT_BASE_EQ_MSG_ASSERTION(test, \ + KUNIT_BINARY_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_EQ_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_EQ_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_PTR_EQ_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_EQ_MSG_ASSERTION(test, \ + KUNIT_BINARY_PTR_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_PTR_EQ_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_PTR_EQ_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_NE_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ + KUNIT_BASE_NE_MSG_ASSERTION(test, \ + KUNIT_BINARY_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_NE_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_NE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_PTR_NE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_NE_MSG_ASSERTION(test, \ + KUNIT_BINARY_PTR_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_PTR_NE_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_PTR_NE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_LT_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ + KUNIT_BASE_LT_MSG_ASSERTION(test, \ + KUNIT_BINARY_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_LT_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_LT_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_PTR_LT_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_LT_MSG_ASSERTION(test, \ + KUNIT_BINARY_PTR_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_PTR_LT_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_PTR_LT_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_LE_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ + KUNIT_BASE_LE_MSG_ASSERTION(test, \ + KUNIT_BINARY_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_LE_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_LE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_PTR_LE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_LE_MSG_ASSERTION(test, \ + KUNIT_BINARY_PTR_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_PTR_LE_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_PTR_LE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_GT_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ + KUNIT_BASE_GT_MSG_ASSERTION(test, \ + KUNIT_BINARY_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_GT_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_GT_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_PTR_GT_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_GT_MSG_ASSERTION(test, \ + KUNIT_BINARY_PTR_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_PTR_GT_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_PTR_GT_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_GE_MSG_ASSERTION(test, assert_type, left, right, fmt, ...)\ + KUNIT_BASE_GE_MSG_ASSERTION(test, \ + KUNIT_BINARY_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_GE_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_GE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_PTR_GE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BASE_GE_MSG_ASSERTION(test, \ + KUNIT_BINARY_PTR_CLASS, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_PTR_GE_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_PTR_GE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_STR_ASSERTION(test, \ + assert_type, \ + left, \ + op, \ + right, \ + fmt, \ + ...) \ +do { \ + typeof(left) __left = (left); \ + typeof(right) __right = (right); \ + \ + KUNIT_ASSERTION(test, \ + strcmp(__left, __right) op 0, \ + kunit_binary_str_assert, \ + KUNIT_INIT_BINARY_ASSERT_STRUCT(test, \ + assert_type, \ + #op, \ + #left, \ + __left, \ + #right, \ + __right), \ + fmt, \ + ##__VA_ARGS__); \ +} while (0) + +#define KUNIT_BINARY_STR_EQ_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BINARY_STR_ASSERTION(test, \ + assert_type, \ + left, ==, right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_STR_EQ_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_STR_EQ_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_BINARY_STR_NE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + fmt, \ + ...) \ + KUNIT_BINARY_STR_ASSERTION(test, \ + assert_type, \ + left, !=, right, \ + fmt, \ + ##__VA_ARGS__) + +#define KUNIT_BINARY_STR_NE_ASSERTION(test, assert_type, left, right) \ + KUNIT_BINARY_STR_NE_MSG_ASSERTION(test, \ + assert_type, \ + left, \ + right, \ + NULL) + +#define KUNIT_PTR_NOT_ERR_OR_NULL_MSG_ASSERTION(test, \ + assert_type, \ + ptr, \ + fmt, \ + ...) \ +do { \ + typeof(ptr) __ptr = (ptr); \ + \ + KUNIT_ASSERTION(test, \ + !IS_ERR_OR_NULL(__ptr), \ + kunit_ptr_not_err_assert, \ + KUNIT_INIT_PTR_NOT_ERR_STRUCT(test, \ + assert_type, \ + #ptr, \ + __ptr), \ + fmt, \ + ##__VA_ARGS__); \ +} while (0) + +#define KUNIT_PTR_NOT_ERR_OR_NULL_ASSERTION(test, assert_type, ptr) \ + KUNIT_PTR_NOT_ERR_OR_NULL_MSG_ASSERTION(test, \ + assert_type, \ + ptr, \ + NULL) + +/** + * KUNIT_EXPECT_TRUE() - Causes a test failure when the expression is not true. + * @test: The test context object. + * @condition: an arbitrary boolean expression. The test fails when this does + * not evaluate to true. + * + * This and expectations of the form `KUNIT_EXPECT_*` will cause the test case + * to fail when the specified condition is not met; however, it will not prevent + * the test case from continuing to run; this is otherwise known as an + * *expectation failure*. + */ +#define KUNIT_EXPECT_TRUE(test, condition) \ + KUNIT_TRUE_ASSERTION(test, KUNIT_EXPECTATION, condition) + +#define KUNIT_EXPECT_TRUE_MSG(test, condition, fmt, ...) \ + KUNIT_TRUE_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + condition, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_FALSE() - Makes a test failure when the expression is not false. + * @test: The test context object. + * @condition: an arbitrary boolean expression. The test fails when this does + * not evaluate to false. + * + * Sets an expectation that @condition evaluates to false. See + * KUNIT_EXPECT_TRUE() for more information. + */ +#define KUNIT_EXPECT_FALSE(test, condition) \ + KUNIT_FALSE_ASSERTION(test, KUNIT_EXPECTATION, condition) + +#define KUNIT_EXPECT_FALSE_MSG(test, condition, fmt, ...) \ + KUNIT_FALSE_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + condition, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_EQ() - Sets an expectation that @left and @right are equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the values that @left and @right evaluate to are + * equal. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, (@left) == (@right)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_EQ(test, left, right) \ + KUNIT_BINARY_EQ_ASSERTION(test, KUNIT_EXPECTATION, left, right) + +#define KUNIT_EXPECT_EQ_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_EQ_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_PTR_EQ() - Expects that pointers @left and @right are equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a pointer. + * @right: an arbitrary expression that evaluates to a pointer. + * + * Sets an expectation that the values that @left and @right evaluate to are + * equal. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, (@left) == (@right)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_PTR_EQ(test, left, right) \ + KUNIT_BINARY_PTR_EQ_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right) + +#define KUNIT_EXPECT_PTR_EQ_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_PTR_EQ_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_NE() - An expectation that @left and @right are not equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the values that @left and @right evaluate to are not + * equal. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, (@left) != (@right)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_NE(test, left, right) \ + KUNIT_BINARY_NE_ASSERTION(test, KUNIT_EXPECTATION, left, right) + +#define KUNIT_EXPECT_NE_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_NE_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_PTR_NE() - Expects that pointers @left and @right are not equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a pointer. + * @right: an arbitrary expression that evaluates to a pointer. + * + * Sets an expectation that the values that @left and @right evaluate to are not + * equal. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, (@left) != (@right)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_PTR_NE(test, left, right) \ + KUNIT_BINARY_PTR_NE_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right) + +#define KUNIT_EXPECT_PTR_NE_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_PTR_NE_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_LT() - An expectation that @left is less than @right. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the value that @left evaluates to is less than the + * value that @right evaluates to. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, (@left) < (@right)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_LT(test, left, right) \ + KUNIT_BINARY_LT_ASSERTION(test, KUNIT_EXPECTATION, left, right) + +#define KUNIT_EXPECT_LT_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_LT_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_LE() - Expects that @left is less than or equal to @right. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the value that @left evaluates to is less than or + * equal to the value that @right evaluates to. Semantically this is equivalent + * to KUNIT_EXPECT_TRUE(@test, (@left) <= (@right)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_LE(test, left, right) \ + KUNIT_BINARY_LE_ASSERTION(test, KUNIT_EXPECTATION, left, right) + +#define KUNIT_EXPECT_LE_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_LE_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_GT() - An expectation that @left is greater than @right. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the value that @left evaluates to is greater than + * the value that @right evaluates to. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, (@left) > (@right)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_GT(test, left, right) \ + KUNIT_BINARY_GT_ASSERTION(test, KUNIT_EXPECTATION, left, right) + +#define KUNIT_EXPECT_GT_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_GT_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_GE() - Expects that @left is greater than or equal to @right. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a primitive C type. + * @right: an arbitrary expression that evaluates to a primitive C type. + * + * Sets an expectation that the value that @left evaluates to is greater than + * the value that @right evaluates to. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, (@left) >= (@right)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_GE(test, left, right) \ + KUNIT_BINARY_GE_ASSERTION(test, KUNIT_EXPECTATION, left, right) + +#define KUNIT_EXPECT_GE_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_GE_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_STREQ() - Expects that strings @left and @right are equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a null terminated string. + * @right: an arbitrary expression that evaluates to a null terminated string. + * + * Sets an expectation that the values that @left and @right evaluate to are + * equal. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, !strcmp((@left), (@right))). See KUNIT_EXPECT_TRUE() + * for more information. + */ +#define KUNIT_EXPECT_STREQ(test, left, right) \ + KUNIT_BINARY_STR_EQ_ASSERTION(test, KUNIT_EXPECTATION, left, right) + +#define KUNIT_EXPECT_STREQ_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_STR_EQ_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_STRNEQ() - Expects that strings @left and @right are not equal. + * @test: The test context object. + * @left: an arbitrary expression that evaluates to a null terminated string. + * @right: an arbitrary expression that evaluates to a null terminated string. + * + * Sets an expectation that the values that @left and @right evaluate to are + * not equal. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, strcmp((@left), (@right))). See KUNIT_EXPECT_TRUE() + * for more information. + */ +#define KUNIT_EXPECT_STRNEQ(test, left, right) \ + KUNIT_BINARY_STR_NE_ASSERTION(test, KUNIT_EXPECTATION, left, right) + +#define KUNIT_EXPECT_STRNEQ_MSG(test, left, right, fmt, ...) \ + KUNIT_BINARY_STR_NE_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + left, \ + right, \ + fmt, \ + ##__VA_ARGS__) + +/** + * KUNIT_EXPECT_NOT_ERR_OR_NULL() - Expects that @ptr is not null and not err. + * @test: The test context object. + * @ptr: an arbitrary pointer. + * + * Sets an expectation that the value that @ptr evaluates to is not null and not + * an errno stored in a pointer. This is semantically equivalent to + * KUNIT_EXPECT_TRUE(@test, !IS_ERR_OR_NULL(@ptr)). See KUNIT_EXPECT_TRUE() for + * more information. + */ +#define KUNIT_EXPECT_NOT_ERR_OR_NULL(test, ptr) \ + KUNIT_PTR_NOT_ERR_OR_NULL_ASSERTION(test, KUNIT_EXPECTATION, ptr) + +#define KUNIT_EXPECT_NOT_ERR_OR_NULL_MSG(test, ptr, fmt, ...) \ + KUNIT_PTR_NOT_ERR_OR_NULL_MSG_ASSERTION(test, \ + KUNIT_EXPECTATION, \ + ptr, \ + fmt, \ + ##__VA_ARGS__)

#endif /* _KUNIT_TEST_H */ diff --git a/kunit/test.c b/kunit/test.c index 68b1037ab74d0..3cbceb34b3b36 100644 --- a/kunit/test.c +++ b/kunit/test.c @@ -120,6 +120,68 @@ static void kunit_print_test_case_ok_not_ok(struct kunit_case *test_case, test_case->name); }

+static void kunit_print_string_stream(struct kunit *test, + struct string_stream *stream) +{ + struct string_stream_fragment *fragment; + char *buf; + + buf = string_stream_get_string(stream); + if (!buf) { + kunit_err(test, + "Could not allocate buffer, dumping stream:\n"); + list_for_each_entry(fragment, &stream->fragments, node) { + kunit_err(test, fragment->fragment); + } + kunit_err(test, "\n"); + } else { + kunit_err(test, buf); + kunit_kfree(test, buf); + } +} + +static void kunit_fail(struct kunit *test, struct kunit_assert *assert) +{ + struct string_stream *stream; + + kunit_set_failure(test); + + stream = alloc_string_stream(test, GFP_KERNEL); + if (!stream) { + WARN(true, + "Could not allocate stream to print failed assertion in %s:%d\n", + assert->file, + assert->line); + return; + } + + assert->format(assert, stream); + + kunit_print_string_stream(test, stream); + + WARN_ON(string_stream_destroy(stream)); +} + +void kunit_do_assertion(struct kunit *test, + struct kunit_assert *assert, + bool pass, + const char *fmt, ...) +{ + va_list args; + + if (pass) + return; + + va_start(args, fmt); + + assert->message.fmt = fmt; + assert->message.va = &args; + + kunit_fail(test, assert); + + va_end(args); +} + void kunit_init_test(struct kunit *test, const char *name) { spin_lock_init(&test->lock);

Add a test for string stream along with a simpler example.

Signed-off-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com Reviewed-by: Stephen Boyd sboyd@kernel.org --- kunit/Kconfig | 21 +++++++++ kunit/Makefile | 4 ++ kunit/example-test.c | 88 ++++++++++++++++++++++++++++++++++++++ kunit/string-stream-test.c | 52 ++++++++++++++++++++++ 4 files changed, 165 insertions(+) create mode 100644 kunit/example-test.c create mode 100644 kunit/string-stream-test.c

diff --git a/kunit/Kconfig b/kunit/Kconfig index 330ae83527c23..8541ef95b65ad 100644 --- a/kunit/Kconfig +++ b/kunit/Kconfig @@ -14,4 +14,25 @@ config KUNIT architectures. For more information, please see Documentation/dev-tools/kunit/.

+config KUNIT_TEST + bool "KUnit test for KUnit" + depends on KUNIT + help + Enables the unit tests for the KUnit test framework. These tests test + the KUnit test framework itself; the tests are both written using + KUnit and test KUnit. This option should only be enabled for testing + purposes by developers interested in testing that KUnit works as + expected. + +config KUNIT_EXAMPLE_TEST + bool "Example test for KUnit" + depends on KUNIT + help + Enables an example unit test that illustrates some of the basic + features of KUnit. This test only exists to help new users understand + what KUnit is and how it is used. Please refer to the example test + itself, kunit/example-test.c, for more information. This option is + intended for curious hackers who would like to understand how to use + KUnit for kernel development. + endmenu diff --git a/kunit/Makefile b/kunit/Makefile index 6dcbe309036b8..4e46450bcb3a8 100644 --- a/kunit/Makefile +++ b/kunit/Makefile @@ -1,3 +1,7 @@ obj-$(CONFIG_KUNIT) += test.o \ string-stream.o \ assert.o + +obj-$(CONFIG_KUNIT_TEST) += string-stream-test.o + +obj-$(CONFIG_KUNIT_EXAMPLE_TEST) += example-test.o diff --git a/kunit/example-test.c b/kunit/example-test.c new file mode 100644 index 0000000000000..f64a829aa441f --- /dev/null +++ b/kunit/example-test.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Example KUnit test to show how to use KUnit. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins brendanhiggins@google.com + */ + +#include <kunit/test.h> + +/* + * This is the most fundamental element of KUnit, the test case. A test case + * makes a set EXPECTATIONs and ASSERTIONs about the behavior of some code; if + * any expectations or assertions are not met, the test fails; otherwise, the + * test passes. + * + * In KUnit, a test case is just a function with the signature + * `void (*)(struct kunit *)`. `struct kunit` is a context object that stores + * information about the current test. + */ +static void example_simple_test(struct kunit *test) +{ + /* + * This is an EXPECTATION; it is how KUnit tests things. When you want + * to test a piece of code, you set some expectations about what the + * code should do. KUnit then runs the test and verifies that the code's + * behavior matched what was expected. + */ + KUNIT_EXPECT_EQ(test, 1 + 1, 2); +} + +/* + * This is run once before each test case, see the comment on + * example_test_suite for more information. + */ +static int example_test_init(struct kunit *test) +{ + kunit_info(test, "initializing\n"); + + return 0; +} + +/* + * Here we make a list of all the test cases we want to add to the test suite + * below. + */ +static struct kunit_case example_test_cases[] = { + /* + * This is a helper to create a test case object from a test case + * function; its exact function is not important to understand how to + * use KUnit, just know that this is how you associate test cases with a + * test suite. + */ + KUNIT_CASE(example_simple_test), + {} +}; + +/* + * This defines a suite or grouping of tests. + * + * Test cases are defined as belonging to the suite by adding them to + * `kunit_cases`. + * + * Often it is desirable to run some function which will set up things which + * will be used by every test; this is accomplished with an `init` function + * which runs before each test case is invoked. Similarly, an `exit` function + * may be specified which runs after every test case and can be used to for + * cleanup. For clarity, running tests in a test suite would behave as follows: + * + * suite.init(test); + * suite.test_case[0](test); + * suite.exit(test); + * suite.init(test); + * suite.test_case[1](test); + * suite.exit(test); + * ...; + */ +static struct kunit_suite example_test_suite = { + .name = "example", + .init = example_test_init, + .test_cases = example_test_cases, +}; + +/* + * This registers the above test suite telling KUnit that this is a suite of + * tests that need to be run. + */ +kunit_test_suite(example_test_suite); diff --git a/kunit/string-stream-test.c b/kunit/string-stream-test.c new file mode 100644 index 0000000000000..75229e267c323 --- /dev/null +++ b/kunit/string-stream-test.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for struct string_stream. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins brendanhiggins@google.com + */ + +#include <kunit/string-stream.h> +#include <kunit/test.h> +#include <linux/slab.h> + +static void string_stream_test_empty_on_creation(struct kunit *test) +{ + struct string_stream *stream = alloc_string_stream(test, GFP_KERNEL); + + KUNIT_EXPECT_TRUE(test, string_stream_is_empty(stream)); +} + +static void string_stream_test_not_empty_after_add(struct kunit *test) +{ + struct string_stream *stream = alloc_string_stream(test, GFP_KERNEL); + + string_stream_add(stream, "Foo"); + + KUNIT_EXPECT_FALSE(test, string_stream_is_empty(stream)); +} + +static void string_stream_test_get_string(struct kunit *test) +{ + struct string_stream *stream = alloc_string_stream(test, GFP_KERNEL); + char *output; + + string_stream_add(stream, "Foo"); + string_stream_add(stream, " %s", "bar"); + + output = string_stream_get_string(stream); + KUNIT_EXPECT_STREQ(test, output, "Foo bar"); +} + +static struct kunit_case string_stream_test_cases[] = { + KUNIT_CASE(string_stream_test_empty_on_creation), + KUNIT_CASE(string_stream_test_not_empty_after_add), + KUNIT_CASE(string_stream_test_get_string), + {} +}; + +static struct kunit_suite string_stream_test_suite = { + .name = "string-stream-test", + .test_cases = string_stream_test_cases +}; +kunit_test_suite(string_stream_test_suite);

Add support for aborting/bailing out of test cases, which is needed for implementing assertions.

An assertion is like an expectation, but bails out of the test case early if the assertion is not met. The idea with assertions is that you use them to state all the preconditions for your test. Logically speaking, these are the premises of the test case, so if a premise isn't true, there is no point in continuing the test case because there are no conclusions that can be drawn without the premises. Whereas, the expectation is the thing you are trying to prove.

Signed-off-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com --- include/kunit/test.h | 2 + include/kunit/try-catch.h | 75 +++++++++++++++++++++ kunit/Makefile | 3 +- kunit/test.c | 137 +++++++++++++++++++++++++++++++++----- kunit/try-catch.c | 118 ++++++++++++++++++++++++++++++++ 5 files changed, 319 insertions(+), 16 deletions(-) create mode 100644 include/kunit/try-catch.h create mode 100644 kunit/try-catch.c

diff --git a/include/kunit/test.h b/include/kunit/test.h index 4c41e6bde1588..f52c7c65ef651 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -10,6 +10,7 @@ #define _KUNIT_TEST_H

#include <kunit/assert.h> +#include <kunit/try-catch.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/types.h> @@ -167,6 +168,7 @@ struct kunit {

/* private: internal use only. */ const char *name; /* Read only after initialization! */ + struct kunit_try_catch try_catch; /* * success starts as true, and may only be set to false during a test * case; thus, it is safe to update this across multiple threads using diff --git a/include/kunit/try-catch.h b/include/kunit/try-catch.h new file mode 100644 index 0000000000000..404f336cbdc85 --- /dev/null +++ b/include/kunit/try-catch.h @@ -0,0 +1,75 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * An API to allow a function, that may fail, to be executed, and recover in a + * controlled manner. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins brendanhiggins@google.com + */ + +#ifndef _KUNIT_TRY_CATCH_H +#define _KUNIT_TRY_CATCH_H + +#include <linux/types.h> + +typedef void (*kunit_try_catch_func_t)(void *); + +struct completion; +struct kunit; + +/** + * struct kunit_try_catch - provides a generic way to run code which might fail. + * @test: The test case that is currently being executed. + * @try_completion: Completion that the control thread waits on while test runs. + * @try_result: Contains any errno obtained while running test case. + * @try: The function, the test case, to attempt to run. + * @catch: The function called if @try bails out. + * @context: used to pass user data to the try and catch functions. + * + * kunit_try_catch provides a generic, architecture independent way to execute + * an arbitrary function of type kunit_try_catch_func_t which may bail out by + * calling kunit_try_catch_throw(). If kunit_try_catch_throw() is called, @try + * is stopped at the site of invocation and @catch is called. + * + * struct kunit_try_catch provides a generic interface for the functionality + * needed to implement kunit->abort() which in turn is needed for implementing + * assertions. Assertions allow stating a precondition for a test simplifying + * how test cases are written and presented. + * + * Assertions are like expectations, except they abort (call + * kunit_try_catch_throw()) when the specified condition is not met. This is + * useful when you look at a test case as a logical statement about some piece + * of code, where assertions are the premises for the test case, and the + * conclusion is a set of predicates, rather expectations, that must all be + * true. If your premises are violated, it does not makes sense to continue. + */ +struct kunit_try_catch { + /* private: internal use only. */ + struct kunit *test; + struct completion *try_completion; + int try_result; + kunit_try_catch_func_t try; + kunit_try_catch_func_t catch; + void *context; +}; + +void kunit_try_catch_init(struct kunit_try_catch *try_catch, + struct kunit *test, + kunit_try_catch_func_t try, + kunit_try_catch_func_t catch); + +void kunit_try_catch_run(struct kunit_try_catch *try_catch, void *context); + +void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch); + +static inline int kunit_try_catch_get_result(struct kunit_try_catch *try_catch) +{ + return try_catch->try_result; +} + +/* + * Exposed for testing only. + */ +void kunit_generic_try_catch_init(struct kunit_try_catch *try_catch); + +#endif /* _KUNIT_TRY_CATCH_H */ diff --git a/kunit/Makefile b/kunit/Makefile index 4e46450bcb3a8..c9176c9c578c6 100644 --- a/kunit/Makefile +++ b/kunit/Makefile @@ -1,6 +1,7 @@ obj-$(CONFIG_KUNIT) += test.o \ string-stream.o \ - assert.o + assert.o \ + try-catch.o

obj-$(CONFIG_KUNIT_TEST) += string-stream-test.o

diff --git a/kunit/test.c b/kunit/test.c index 3cbceb34b3b36..ded9895143209 100644 --- a/kunit/test.c +++ b/kunit/test.c @@ -7,7 +7,9 @@ */

#include <kunit/test.h> +#include <kunit/try-catch.h> #include <linux/kernel.h> +#include <linux/sched/debug.h>

static void kunit_set_failure(struct kunit *test) { @@ -162,6 +164,19 @@ static void kunit_fail(struct kunit *test, struct kunit_assert *assert) WARN_ON(string_stream_destroy(stream)); }

+static void __noreturn kunit_abort(struct kunit *test) +{ + kunit_try_catch_throw(&test->try_catch); /* Does not return. */ + + /* + * Throw could not abort from test. + * + * XXX: we should never reach this line! As kunit_try_catch_throw is + * marked __noreturn. + */ + BUG(); +} + void kunit_do_assertion(struct kunit *test, struct kunit_assert *assert, bool pass, @@ -180,6 +195,9 @@ void kunit_do_assertion(struct kunit *test, kunit_fail(test, assert);

va_end(args); + + if (assert->type == KUNIT_ASSERTION) + kunit_abort(test); }

void kunit_init_test(struct kunit *test, const char *name) @@ -191,33 +209,122 @@ void kunit_init_test(struct kunit *test, const char *name) }

/* - * Performs all logic to run a test case. + * Initializes and runs test case. Does not clean up or do post validations. */ -static void kunit_run_case(struct kunit_suite *suite, - struct kunit_case *test_case) +static void kunit_run_case_internal(struct kunit *test, + struct kunit_suite *suite, + struct kunit_case *test_case) { - struct kunit test; - - kunit_init_test(&test, test_case->name); - if (suite->init) { int ret;

- ret = suite->init(&test); + ret = suite->init(test); if (ret) { - kunit_err(&test, "failed to initialize: %d\n", ret); - kunit_set_failure(&test); - test_case->success = test.success; + kunit_err(test, "failed to initialize: %d\n", ret); + kunit_set_failure(test); return; } }

- test_case->run_case(&test); + test_case->run_case(test); +}

+static void kunit_case_internal_cleanup(struct kunit *test) +{ + kunit_cleanup(test); +} + +/* + * Performs post validations and cleanup after a test case was run. + * XXX: Should ONLY BE CALLED AFTER kunit_run_case_internal! + */ +static void kunit_run_case_cleanup(struct kunit *test, + struct kunit_suite *suite) +{ if (suite->exit) - suite->exit(&test); + suite->exit(test); + + kunit_case_internal_cleanup(test); +} + +struct kunit_try_catch_context { + struct kunit *test; + struct kunit_suite *suite; + struct kunit_case *test_case; +}; + +static void kunit_try_run_case(void *data) +{ + struct kunit_try_catch_context *ctx = data; + struct kunit *test = ctx->test; + struct kunit_suite *suite = ctx->suite; + struct kunit_case *test_case = ctx->test_case; + + /* + * kunit_run_case_internal may encounter a fatal error; if it does, + * abort will be called, this thread will exit, and finally the parent + * thread will resume control and handle any necessary clean up. + */ + kunit_run_case_internal(test, suite, test_case); + /* This line may never be reached. */ + kunit_run_case_cleanup(test, suite); +} + +static void kunit_catch_run_case(void *data) +{ + struct kunit_try_catch_context *ctx = data; + struct kunit *test = ctx->test; + struct kunit_suite *suite = ctx->suite; + int try_exit_code = kunit_try_catch_get_result(&test->try_catch); + + if (try_exit_code) { + kunit_set_failure(test); + /* + * Test case could not finish, we have no idea what state it is + * in, so don't do clean up. + */ + if (try_exit_code == -ETIMEDOUT) { + kunit_err(test, "test case timed out\n"); + /* + * Unknown internal error occurred preventing test case from + * running, so there is nothing to clean up. + */ + } else { + kunit_err(test, "internal error occurred preventing test case from running: %d\n", + try_exit_code); + } + return; + } + + /* + * Test case was run, but aborted. It is the test case's business as to + * whether it failed or not, we just need to clean up. + */ + kunit_run_case_cleanup(test, suite); +} + +/* + * Performs all logic to run a test case. It also catches most errors that + * occur in a test case and reports them as failures. + */ +static void kunit_run_case_catch_errors(struct kunit_suite *suite, + struct kunit_case *test_case) +{ + struct kunit_try_catch_context context; + struct kunit_try_catch *try_catch; + struct kunit test; + + kunit_init_test(&test, test_case->name); + try_catch = &test.try_catch;

- kunit_cleanup(&test); + kunit_try_catch_init(try_catch, + &test, + kunit_try_run_case, + kunit_catch_run_case); + context.test = &test; + context.suite = suite; + context.test_case = test_case; + kunit_try_catch_run(try_catch, &context);

test_case->success = test.success; } @@ -230,7 +337,7 @@ int kunit_run_tests(struct kunit_suite *suite) kunit_print_subtest_start(suite);

for (test_case = suite->test_cases; test_case->run_case; test_case++) { - kunit_run_case(suite, test_case); + kunit_run_case_catch_errors(suite, test_case); kunit_print_test_case_ok_not_ok(test_case, test_case_count++); }

diff --git a/kunit/try-catch.c b/kunit/try-catch.c new file mode 100644 index 0000000000000..55686839eb619 --- /dev/null +++ b/kunit/try-catch.c @@ -0,0 +1,118 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * An API to allow a function, that may fail, to be executed, and recover in a + * controlled manner. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins brendanhiggins@google.com + */ + +#include <kunit/test.h> +#include <kunit/try-catch.h> +#include <linux/completion.h> +#include <linux/kernel.h> +#include <linux/kthread.h> +#include <linux/sched/sysctl.h> + +void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch) +{ + try_catch->try_result = -EFAULT; + complete_and_exit(try_catch->try_completion, -EFAULT); +} + +static int kunit_generic_run_threadfn_adapter(void *data) +{ + struct kunit_try_catch *try_catch = data; + + try_catch->try(try_catch->context); + + complete_and_exit(try_catch->try_completion, 0); +} + +static unsigned long kunit_test_timeout(void) +{ + unsigned long timeout_msecs; + + /* + * TODO(brendanhiggins@google.com): We should probably have some type of + * variable timeout here. The only question is what that timeout value + * should be. + * + * The intention has always been, at some point, to be able to label + * tests with some type of size bucket (unit/small, integration/medium, + * large/system/end-to-end, etc), where each size bucket would get a + * default timeout value kind of like what Bazel does: + * https://docs.bazel.build/versions/master/be/common-definitions.html#test.siz... + * There is still some debate to be had on exactly how we do this. (For + * one, we probably want to have some sort of test runner level + * timeout.) + * + * For more background on this topic, see: + * https://mike-bland.com/2011/11/01/small-medium-large.html + */ + if (sysctl_hung_task_timeout_secs) { + /* + * If sysctl_hung_task is active, just set the timeout to some + * value less than that. + * + * In regards to the above TODO, if we decide on variable + * timeouts, this logic will likely need to change. + */ + timeout_msecs = (sysctl_hung_task_timeout_secs - 1) * + MSEC_PER_SEC; + } else { + timeout_msecs = 300 * MSEC_PER_SEC; /* 5 min */ + } + + return timeout_msecs; +} + +void kunit_try_catch_run(struct kunit_try_catch *try_catch, void *context) +{ + DECLARE_COMPLETION_ONSTACK(try_completion); + struct kunit *test = try_catch->test; + struct task_struct *task_struct; + int exit_code, time_remaining; + + try_catch->context = context; + try_catch->try_completion = &try_completion; + try_catch->try_result = 0; + task_struct = kthread_run(kunit_generic_run_threadfn_adapter, + try_catch, + "kunit_try_catch_thread"); + if (IS_ERR(task_struct)) { + try_catch->catch(try_catch->context); + return; + } + + time_remaining = wait_for_completion_timeout(&try_completion, + kunit_test_timeout()); + if (time_remaining == 0) { + kunit_err(test, "try timed out\n"); + try_catch->try_result = -ETIMEDOUT; + } + + exit_code = try_catch->try_result; + + if (!exit_code) + return; + + if (exit_code == -EFAULT) + try_catch->try_result = 0; + else if (exit_code == -EINTR) + kunit_err(test, "wake_up_process() was never called\n"); + else if (exit_code) + kunit_err(test, "Unknown error: %d\n", exit_code); + + try_catch->catch(try_catch->context); +} + +void kunit_try_catch_init(struct kunit_try_catch *try_catch, + struct kunit *test, + kunit_try_catch_func_t try, + kunit_try_catch_func_t catch) +{ + try_catch->test = test; + try_catch->try = try; + try_catch->catch = catch; +}

Add KUnit tests for the KUnit test abort mechanism (see preceding commit). Add tests both for general try catch mechanism as well as non-architecture specific mechanism.

Signed-off-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com Reviewed-by: Stephen Boyd sboyd@kernel.org --- kunit/Makefile | 3 +- kunit/test-test.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 108 insertions(+), 1 deletion(-) create mode 100644 kunit/test-test.c

diff --git a/kunit/Makefile b/kunit/Makefile index c9176c9c578c6..769d9402b5d3a 100644 --- a/kunit/Makefile +++ b/kunit/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_KUNIT) += test.o \ assert.o \ try-catch.o

-obj-$(CONFIG_KUNIT_TEST) += string-stream-test.o +obj-$(CONFIG_KUNIT_TEST) += test-test.o \ + string-stream-test.o

obj-$(CONFIG_KUNIT_EXAMPLE_TEST) += example-test.o diff --git a/kunit/test-test.c b/kunit/test-test.c new file mode 100644 index 0000000000000..06d34d36b1038 --- /dev/null +++ b/kunit/test-test.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for core test infrastructure. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins brendanhiggins@google.com + */ +#include <kunit/test.h> + +struct kunit_try_catch_test_context { + struct kunit_try_catch *try_catch; + bool function_called; +}; + +static void kunit_test_successful_try(void *data) +{ + struct kunit *test = data; + struct kunit_try_catch_test_context *ctx = test->priv; + + ctx->function_called = true; +} + +static void kunit_test_no_catch(void *data) +{ + struct kunit *test = data; + + KUNIT_FAIL(test, "Catch should not be called\n"); +} + +static void kunit_test_try_catch_successful_try_no_catch(struct kunit *test) +{ + struct kunit_try_catch_test_context *ctx = test->priv; + struct kunit_try_catch *try_catch = ctx->try_catch; + + kunit_try_catch_init(try_catch, + test, + kunit_test_successful_try, + kunit_test_no_catch); + kunit_try_catch_run(try_catch, test); + + KUNIT_EXPECT_TRUE(test, ctx->function_called); +} + +static void kunit_test_unsuccessful_try(void *data) +{ + struct kunit *test = data; + struct kunit_try_catch_test_context *ctx = test->priv; + struct kunit_try_catch *try_catch = ctx->try_catch; + + kunit_try_catch_throw(try_catch); + KUNIT_FAIL(test, "This line should never be reached\n"); +} + +static void kunit_test_catch(void *data) +{ + struct kunit *test = data; + struct kunit_try_catch_test_context *ctx = test->priv; + + ctx->function_called = true; +} + +static void kunit_test_try_catch_unsuccessful_try_does_catch(struct kunit *test) +{ + struct kunit_try_catch_test_context *ctx = test->priv; + struct kunit_try_catch *try_catch = ctx->try_catch; + + kunit_try_catch_init(try_catch, + test, + kunit_test_unsuccessful_try, + kunit_test_catch); + kunit_try_catch_run(try_catch, test); + + KUNIT_EXPECT_TRUE(test, ctx->function_called); +} + +static int kunit_try_catch_test_init(struct kunit *test) +{ + struct kunit_try_catch_test_context *ctx; + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + test->priv = ctx; + + ctx->try_catch = kunit_kmalloc(test, + sizeof(*ctx->try_catch), + GFP_KERNEL); + if (!ctx->try_catch) + return -ENOMEM; + + return 0; +} + +static struct kunit_case kunit_try_catch_test_cases[] = { + KUNIT_CASE(kunit_test_try_catch_successful_try_no_catch), + KUNIT_CASE(kunit_test_try_catch_unsuccessful_try_does_catch), + {} +}; + +static struct kunit_suite kunit_try_catch_test_suite = { + .name = "kunit-try-catch-test", + .init = kunit_try_catch_test_init, + .test_cases = kunit_try_catch_test_cases, +}; +kunit_test_suite(kunit_try_catch_test_suite);

From: Avinash Kondareddy akndr41@gmail.com

Add unit tests for KUnit managed resources. KUnit managed resources (struct kunit_resource) are resources that are automatically cleaned up at the end of a KUnit test, similar to the concept of devm_* managed resources.

Signed-off-by: Avinash Kondareddy akndr41@gmail.com Signed-off-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com --- kunit/test-test.c | 228 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 228 insertions(+)

diff --git a/kunit/test-test.c b/kunit/test-test.c index e0ab4bd546eac..5ebe059d16e25 100644 --- a/kunit/test-test.c +++ b/kunit/test-test.c @@ -101,3 +101,231 @@ static struct kunit_suite kunit_try_catch_test_suite = { .test_cases = kunit_try_catch_test_cases, }; kunit_test_suite(kunit_try_catch_test_suite); + +/* + * Context for testing test managed resources + * is_resource_initialized is used to test arbitrary resources + */ +struct kunit_test_resource_context { + struct kunit test; + bool is_resource_initialized; + int allocate_order[2]; + int free_order[2]; +}; + +static int fake_resource_init(struct kunit_resource *res, void *context) +{ + struct kunit_test_resource_context *ctx = context; + + res->allocation = &ctx->is_resource_initialized; + ctx->is_resource_initialized = true; + return 0; +} + +static void fake_resource_free(struct kunit_resource *res) +{ + bool *is_resource_initialized = res->allocation; + + *is_resource_initialized = false; +} + +static void kunit_resource_test_init_resources(struct kunit *test) +{ + struct kunit_test_resource_context *ctx = test->priv; + + kunit_init_test(&ctx->test, "testing_test_init_test"); + + KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources)); +} + +static void kunit_resource_test_alloc_resource(struct kunit *test) +{ + struct kunit_test_resource_context *ctx = test->priv; + struct kunit_resource *res; + kunit_resource_free_t free = fake_resource_free; + + res = kunit_alloc_and_get_resource(&ctx->test, + fake_resource_init, + fake_resource_free, + GFP_KERNEL, + ctx); + + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, res); + KUNIT_EXPECT_PTR_EQ(test, + &ctx->is_resource_initialized, + (bool *) res->allocation); + KUNIT_EXPECT_TRUE(test, list_is_last(&res->node, &ctx->test.resources)); + KUNIT_EXPECT_PTR_EQ(test, free, res->free); +} + +static void kunit_resource_test_destroy_resource(struct kunit *test) +{ + struct kunit_test_resource_context *ctx = test->priv; + struct kunit_resource *res = kunit_alloc_and_get_resource( + &ctx->test, + fake_resource_init, + fake_resource_free, + GFP_KERNEL, + ctx); + + KUNIT_ASSERT_FALSE(test, + kunit_resource_destroy(&ctx->test, + kunit_resource_instance_match, + res->free, + res->allocation)); + + KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized); + KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources)); +} + +static void kunit_resource_test_cleanup_resources(struct kunit *test) +{ + int i; + struct kunit_test_resource_context *ctx = test->priv; + struct kunit_resource *resources[5]; + + for (i = 0; i < ARRAY_SIZE(resources); i++) { + resources[i] = kunit_alloc_and_get_resource(&ctx->test, + fake_resource_init, + fake_resource_free, + GFP_KERNEL, + ctx); + } + + kunit_cleanup(&ctx->test); + + KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources)); +} + +static void kunit_resource_test_mark_order(int order_array[], + size_t order_size, + int key) +{ + int i; + + for (i = 0; i < order_size && order_array[i]; i++) + ; + + order_array[i] = key; +} + +#define KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, order_field, key) \ + kunit_resource_test_mark_order(ctx->order_field, \ + ARRAY_SIZE(ctx->order_field), \ + key) + +static int fake_resource_2_init(struct kunit_resource *res, void *context) +{ + struct kunit_test_resource_context *ctx = context; + + KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 2); + + res->allocation = ctx; + + return 0; +} + +static void fake_resource_2_free(struct kunit_resource *res) +{ + struct kunit_test_resource_context *ctx = res->allocation; + + KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 2); +} + +static int fake_resource_1_init(struct kunit_resource *res, void *context) +{ + struct kunit_test_resource_context *ctx = context; + + kunit_alloc_and_get_resource(&ctx->test, + fake_resource_2_init, + fake_resource_2_free, + GFP_KERNEL, + ctx); + + KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 1); + + res->allocation = ctx; + + return 0; +} + +static void fake_resource_1_free(struct kunit_resource *res) +{ + struct kunit_test_resource_context *ctx = res->allocation; + + KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 1); +} + +/* + * TODO(brendanhiggins@google.com): replace the arrays that keep track of the + * order of allocation and freeing with strict mocks using the IN_SEQUENCE macro + * to assert allocation and freeing order when the feature becomes available. + */ +static void kunit_resource_test_proper_free_ordering(struct kunit *test) +{ + struct kunit_test_resource_context *ctx = test->priv; + + /* fake_resource_1 allocates a fake_resource_2 in its init. */ + kunit_alloc_and_get_resource(&ctx->test, + fake_resource_1_init, + fake_resource_1_free, + GFP_KERNEL, + ctx); + + /* + * Since fake_resource_2_init calls KUNIT_RESOURCE_TEST_MARK_ORDER + * before returning to fake_resource_1_init, it should be the first to + * put its key in the allocate_order array. + */ + KUNIT_EXPECT_EQ(test, ctx->allocate_order[0], 2); + KUNIT_EXPECT_EQ(test, ctx->allocate_order[1], 1); + + kunit_cleanup(&ctx->test); + + /* + * Because fake_resource_2 finishes allocation before fake_resource_1, + * fake_resource_1 should be freed first since it could depend on + * fake_resource_2. + */ + KUNIT_EXPECT_EQ(test, ctx->free_order[0], 1); + KUNIT_EXPECT_EQ(test, ctx->free_order[1], 2); +} + +static int kunit_resource_test_init(struct kunit *test) +{ + struct kunit_test_resource_context *ctx = + kzalloc(sizeof(*ctx), GFP_KERNEL); + + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + + test->priv = ctx; + + kunit_init_test(&ctx->test, "test_test_context"); + + return 0; +} + +static void kunit_resource_test_exit(struct kunit *test) +{ + struct kunit_test_resource_context *ctx = test->priv; + + kunit_cleanup(&ctx->test); + kfree(ctx); +} + +static struct kunit_case kunit_resource_test_cases[] = { + KUNIT_CASE(kunit_resource_test_init_resources), + KUNIT_CASE(kunit_resource_test_alloc_resource), + KUNIT_CASE(kunit_resource_test_destroy_resource), + KUNIT_CASE(kunit_resource_test_cleanup_resources), + KUNIT_CASE(kunit_resource_test_proper_free_ordering), + {} +}; + +static struct kunit_suite kunit_resource_test_suite = { + .name = "kunit-resource-test", + .init = kunit_resource_test_init, + .exit = kunit_resource_test_exit, + .test_cases = kunit_resource_test_cases, +}; +kunit_test_suite(kunit_resource_test_suite);

From: Felix Guo felixguoxiuping@gmail.com

The ultimate goal is to create minimal isolated test binaries; in the meantime we are using UML to provide the infrastructure to run tests, so define an abstract way to configure and run tests that allow us to change the context in which tests are built without affecting the user. This also makes pretty and dynamic error reporting, and a lot of other nice features easier.

kunit_config.py: - parse .config and Kconfig files.

kunit_kernel.py: provides helper functions to: - configure the kernel using kunitconfig. - build the kernel with the appropriate configuration. - provide function to invoke the kernel and stream the output back.

kunit_parser.py: parses raw logs returned out by kunit_kernel and displays them in a user friendly way.

test_data/*: samples of test data for testing kunit.py, kunit_config.py, etc.

Signed-off-by: Felix Guo felixguoxiuping@gmail.com Signed-off-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com Reviewed-by: Stephen Boyd sboyd@kernel.org --- tools/testing/kunit/.gitignore | 3 + tools/testing/kunit/kunit.py | 116 +++++++ tools/testing/kunit/kunit_config.py | 66 ++++ tools/testing/kunit/kunit_kernel.py | 148 +++++++++ tools/testing/kunit/kunit_parser.py | 310 ++++++++++++++++++ tools/testing/kunit/kunit_tool_test.py | 206 ++++++++++++ .../test_is_test_passed-all_passed.log | 32 ++ .../test_data/test_is_test_passed-crash.log | 69 ++++ .../test_data/test_is_test_passed-failure.log | 36 ++ .../test_is_test_passed-no_tests_run.log | 75 +++++ .../test_output_isolated_correctly.log | 106 ++++++ .../test_data/test_read_from_file.kconfig | 17 + 12 files changed, 1184 insertions(+) create mode 100644 tools/testing/kunit/.gitignore create mode 100755 tools/testing/kunit/kunit.py create mode 100644 tools/testing/kunit/kunit_config.py create mode 100644 tools/testing/kunit/kunit_kernel.py create mode 100644 tools/testing/kunit/kunit_parser.py create mode 100755 tools/testing/kunit/kunit_tool_test.py create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-all_passed.log create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-crash.log create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-failure.log create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-no_tests_run.log create mode 100644 tools/testing/kunit/test_data/test_output_isolated_correctly.log create mode 100644 tools/testing/kunit/test_data/test_read_from_file.kconfig

diff --git a/tools/testing/kunit/.gitignore b/tools/testing/kunit/.gitignore new file mode 100644 index 0000000000000..c791ff59a37a9 --- /dev/null +++ b/tools/testing/kunit/.gitignore @@ -0,0 +1,3 @@ +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] \ No newline at end of file diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py new file mode 100755 index 0000000000000..da11bd62a4b82 --- /dev/null +++ b/tools/testing/kunit/kunit.py @@ -0,0 +1,116 @@ +#!/usr/bin/python3 +# SPDX-License-Identifier: GPL-2.0 +# +# A thin wrapper on top of the KUnit Kernel +# +# Copyright (C) 2019, Google LLC. +# Author: Felix Guo felixguoxiuping@gmail.com +# Author: Brendan Higgins brendanhiggins@google.com + +import argparse +import sys +import os +import time + +from collections import namedtuple +from enum import Enum, auto + +import kunit_config +import kunit_kernel +import kunit_parser + +KunitResult = namedtuple('KunitResult', ['status','result']) + +KunitRequest = namedtuple('KunitRequest', ['raw_output','timeout', 'jobs', 'build_dir']) + +class KunitStatus(Enum): + SUCCESS = auto() + CONFIG_FAILURE = auto() + BUILD_FAILURE = auto() + TEST_FAILURE = auto() + +def run_tests(linux: kunit_kernel.LinuxSourceTree, + request: KunitRequest) -> KunitResult: + config_start = time.time() + success = linux.build_reconfig(request.build_dir) + config_end = time.time() + if not success: + return KunitResult(KunitStatus.CONFIG_FAILURE, 'could not configure kernel') + + kunit_parser.print_with_timestamp('Building KUnit Kernel ...') + + build_start = time.time() + success = linux.build_um_kernel(request.jobs, request.build_dir) + build_end = time.time() + if not success: + return KunitResult(KunitStatus.BUILD_FAILURE, 'could not build kernel') + + kunit_parser.print_with_timestamp('Starting KUnit Kernel ...') + test_start = time.time() + + test_result = kunit_parser.TestResult(kunit_parser.TestStatus.SUCCESS, + [], + 'Tests not Parsed.') + if request.raw_output: + kunit_parser.raw_output( + linux.run_kernel(timeout=request.timeout)) + else: + kunit_output = linux.run_kernel(timeout=request.timeout) + test_result = kunit_parser.parse_run_tests(kunit_output) + test_end = time.time() + + kunit_parser.print_with_timestamp(( + 'Elapsed time: %.3fs total, %.3fs configuring, %.3fs ' + + 'building, %.3fs running\n') % ( + test_end - config_start, + config_end - config_start, + build_end - build_start, + test_end - test_start)) + + if test_result.status != kunit_parser.TestStatus.SUCCESS: + return KunitResult(KunitStatus.TEST_FAILURE, test_result) + else: + return KunitResult(KunitStatus.SUCCESS, test_result) + +def main(argv, linux): + parser = argparse.ArgumentParser( + description='Helps writing and running KUnit tests.') + subparser = parser.add_subparsers(dest='subcommand') + + run_parser = subparser.add_parser('run', help='Runs KUnit tests.') + run_parser.add_argument('--raw_output', help='don't format output from kernel', + action='store_true') + + run_parser.add_argument('--timeout', + help='maximum number of seconds to allow for all tests ' + 'to run. This does not include time taken to build the ' + 'tests.', + type=int, + default=300, + metavar='timeout') + + run_parser.add_argument('--jobs', + help='As in the make command, "Specifies the number of ' + 'jobs (commands) to run simultaneously."', + type=int, default=8, metavar='jobs') + + run_parser.add_argument('--build_dir', + help='As in the make command, it specifies the build ' + 'directory.', + type=str, default=None, metavar='build_dir') + + cli_args = parser.parse_args(argv) + + if cli_args.subcommand == 'run': + request = KunitRequest(cli_args.raw_output, + cli_args.timeout, + cli_args.jobs, + cli_args.build_dir) + result = run_tests(linux, request) + if result.status != KunitStatus.SUCCESS: + sys.exit(1) + else: + parser.print_help() + +if __name__ == '__main__': + main(sys.argv[1:], kunit_kernel.LinuxSourceTree()) diff --git a/tools/testing/kunit/kunit_config.py b/tools/testing/kunit/kunit_config.py new file mode 100644 index 0000000000000..ebf3942b23f51 --- /dev/null +++ b/tools/testing/kunit/kunit_config.py @@ -0,0 +1,66 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Builds a .config from a kunitconfig. +# +# Copyright (C) 2019, Google LLC. +# Author: Felix Guo felixguoxiuping@gmail.com +# Author: Brendan Higgins brendanhiggins@google.com + +import collections +import re + +CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_\w+ is not set$' +CONFIG_PATTERN = r'^CONFIG_\w+=\S+$' + +KconfigEntryBase = collections.namedtuple('KconfigEntry', ['raw_entry']) + + +class KconfigEntry(KconfigEntryBase): + + def __str__(self) -> str: + return self.raw_entry + + +class KconfigParseError(Exception): + """Error parsing Kconfig defconfig or .config.""" + + +class Kconfig(object): + """Represents defconfig or .config specified using the Kconfig language.""" + + def __init__(self): + self._entries = [] + + def entries(self): + return set(self._entries) + + def add_entry(self, entry: KconfigEntry) -> None: + self._entries.append(entry) + + def is_subset_of(self, other: 'Kconfig') -> bool: + return self.entries().issubset(other.entries()) + + def write_to_file(self, path: str) -> None: + with open(path, 'w') as f: + for entry in self.entries(): + f.write(str(entry) + '\n') + + def parse_from_string(self, blob: str) -> None: + """Parses a string containing KconfigEntrys and populates this Kconfig.""" + self._entries = [] + is_not_set_matcher = re.compile(CONFIG_IS_NOT_SET_PATTERN) + config_matcher = re.compile(CONFIG_PATTERN) + for line in blob.split('\n'): + line = line.strip() + if not line: + continue + elif config_matcher.match(line) or is_not_set_matcher.match(line): + self._entries.append(KconfigEntry(line)) + elif line[0] == '#': + continue + else: + raise KconfigParseError('Failed to parse: ' + line) + + def read_from_file(self, path: str) -> None: + with open(path, 'r') as f: + self.parse_from_string(f.read()) diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py new file mode 100644 index 0000000000000..07c0abf2f47df --- /dev/null +++ b/tools/testing/kunit/kunit_kernel.py @@ -0,0 +1,148 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Runs UML kernel, collects output, and handles errors. +# +# Copyright (C) 2019, Google LLC. +# Author: Felix Guo felixguoxiuping@gmail.com +# Author: Brendan Higgins brendanhiggins@google.com + + +import logging +import subprocess +import os + +import kunit_config + +KCONFIG_PATH = '.config' + +class ConfigError(Exception): + """Represents an error trying to configure the Linux kernel.""" + + +class BuildError(Exception): + """Represents an error trying to build the Linux kernel.""" + + +class LinuxSourceTreeOperations(object): + """An abstraction over command line operations performed on a source tree.""" + + def make_mrproper(self): + try: + subprocess.check_output(['make', 'mrproper']) + except OSError as e: + raise ConfigError('Could not call make command: ' + e) + except subprocess.CalledProcessError as e: + raise ConfigError(e.output) + + def make_olddefconfig(self, build_dir): + command = ['make', 'ARCH=um', 'olddefconfig'] + if build_dir: + command += ['O=' + build_dir] + try: + subprocess.check_output(command) + except OSError as e: + raise ConfigError('Could not call make command: ' + e) + except subprocess.CalledProcessError as e: + raise ConfigError(e.output) + + def make(self, jobs, build_dir): + command = ['make', 'ARCH=um', '--jobs=' + str(jobs)] + if build_dir: + command += ['O=' + build_dir] + try: + subprocess.check_output(command) + except OSError as e: + raise BuildError('Could not call execute make: ' + e) + except subprocess.CalledProcessError as e: + raise BuildError(e.output) + + def linux_bin(self, params, timeout, build_dir): + """Runs the Linux UML binary. Must be named 'linux'.""" + linux_bin = './linux' + if build_dir: + linux_bin = os.path.join(build_dir, 'linux') + process = subprocess.Popen( + [linux_bin] + params, + stdin=subprocess.PIPE, + stdout=subprocess.PIPE, + stderr=subprocess.PIPE) + process.wait(timeout=timeout) + return process + + +def get_kconfig_path(build_dir): + kconfig_path = KCONFIG_PATH + if build_dir: + kconfig_path = os.path.join(build_dir, KCONFIG_PATH) + return kconfig_path + +class LinuxSourceTree(object): + """Represents a Linux kernel source tree with KUnit tests.""" + + def __init__(self): + self._kconfig = kunit_config.Kconfig() + self._kconfig.read_from_file('kunitconfig') + self._ops = LinuxSourceTreeOperations() + + def clean(self): + try: + self._ops.make_mrproper() + except ConfigError as e: + logging.error(e) + return False + return True + + def build_config(self, build_dir): + kconfig_path = get_kconfig_path(build_dir) + if build_dir and not os.path.exists(build_dir): + os.mkdir(build_dir) + self._kconfig.write_to_file(kconfig_path) + try: + self._ops.make_olddefconfig(build_dir) + except ConfigError as e: + logging.error(e) + return False + validated_kconfig = kunit_config.Kconfig() + validated_kconfig.read_from_file(kconfig_path) + if not self._kconfig.is_subset_of(validated_kconfig): + logging.error('Provided Kconfig is not contained in validated .config!') + return False + return True + + def build_reconfig(self, build_dir): + """Creates a new .config if it is not a subset of the kunitconfig.""" + kconfig_path = get_kconfig_path(build_dir) + if os.path.exists(kconfig_path): + existing_kconfig = kunit_config.Kconfig() + existing_kconfig.read_from_file(kconfig_path) + if not self._kconfig.is_subset_of(existing_kconfig): + print('Regenerating .config ...') + os.remove(kconfig_path) + return self.build_config(build_dir) + else: + return True + else: + print('Generating .config ...') + return self.build_config(build_dir) + + def build_um_kernel(self, jobs, build_dir): + try: + self._ops.make_olddefconfig(build_dir) + self._ops.make(jobs, build_dir) + except (ConfigError, BuildError) as e: + logging.error(e) + return False + used_kconfig = kunit_config.Kconfig() + used_kconfig.read_from_file(get_kconfig_path(build_dir)) + if not self._kconfig.is_subset_of(used_kconfig): + logging.error('Provided Kconfig is not contained in final config!') + return False + return True + + def run_kernel(self, args=[], timeout=None, build_dir=None): + args.extend(['mem=256M']) + process = self._ops.linux_bin(args, timeout, build_dir) + with open('test.log', 'w') as f: + for line in process.stdout: + f.write(line.rstrip().decode('ascii') + '\n') + yield line.rstrip().decode('ascii') diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py new file mode 100644 index 0000000000000..4ffbae0f67325 --- /dev/null +++ b/tools/testing/kunit/kunit_parser.py @@ -0,0 +1,310 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Parses test results from a kernel dmesg log. +# +# Copyright (C) 2019, Google LLC. +# Author: Felix Guo felixguoxiuping@gmail.com +# Author: Brendan Higgins brendanhiggins@google.com + +import re + +from collections import namedtuple +from datetime import datetime +from enum import Enum, auto +from functools import reduce +from typing import List + +TestResult = namedtuple('TestResult', ['status','suites','log']) + +class TestSuite(object): + def __init__(self): + self.status = None + self.name = None + self.cases = [] + + def __str__(self): + return 'TestSuite(' + self.status + ',' + self.name + ',' + str(self.cases) + ')' + + def __repr__(self): + return str(self) + +class TestCase(object): + def __init__(self): + self.status = None + self.name = '' + self.log = [] + + def __str__(self): + return 'TestCase(' + self.status + ',' + self.name + ',' + str(self.log) + ')' + + def __repr__(self): + return str(self) + +class TestStatus(Enum): + SUCCESS = auto() + FAILURE = auto() + TEST_CRASHED = auto() + NO_TESTS = auto() + +kunit_start_re = re.compile(r'^TAP version [0-9]+$') +kunit_end_re = re.compile('List of all partitions:') + +def isolate_kunit_output(kernel_output): + started = False + for line in kernel_output: + if kunit_start_re.match(line): + started = True + yield line + elif kunit_end_re.match(line): + break + elif started: + yield line + +def raw_output(kernel_output): + for line in kernel_output: + print(line) + +DIVIDER = '=' * 60 + +RESET = '\033[0;0m' + +def red(text): + return '\033[1;31m' + text + RESET + +def yellow(text): + return '\033[1;33m' + text + RESET + +def green(text): + return '\033[1;32m' + text + RESET + +def print_with_timestamp(message): + print('[%s] %s' % (datetime.now().strftime('%H:%M:%S'), message)) + +def format_suite_divider(message): + return '======== ' + message + ' ========' + +def print_suite_divider(message): + print_with_timestamp(DIVIDER) + print_with_timestamp(format_suite_divider(message)) + +def print_log(log): + for m in log: + print_with_timestamp(m) + +TAP_ENTRIES = re.compile(r'^(TAP|\t?ok|\t?not ok|\t?[0-9]+..[0-9]+|\t?#).*$') + +def consume_non_diagnositic(lines: List[str]) -> None: + while lines and not TAP_ENTRIES.match(lines[0]): + lines.pop(0) + +def save_non_diagnositic(lines: List[str], test_case: TestCase) -> None: + while lines and not TAP_ENTRIES.match(lines[0]): + test_case.log.append(lines[0]) + lines.pop(0) + +OkNotOkResult = namedtuple('OkNotOkResult', ['is_ok','description', 'text']) + +OK_NOT_OK_SUBTEST = re.compile(r'^\t(ok|not ok) [0-9]+ - (.*)$') + +OK_NOT_OK_MODULE = re.compile(r'^(ok|not ok) [0-9]+ - (.*)$') + +def parse_ok_not_ok_test_case(lines: List[str], + test_case: TestCase, + expecting_test_case: bool) -> bool: + save_non_diagnositic(lines, test_case) + if not lines: + if expecting_test_case: + test_case.status = TestStatus.TEST_CRASHED + return True + else: + return False + line = lines[0] + match = OK_NOT_OK_SUBTEST.match(line) + if match: + test_case.log.append(lines.pop(0)) + test_case.name = match.group(2) + if test_case.status == TestStatus.TEST_CRASHED: + return True + if match.group(1) == 'ok': + test_case.status = TestStatus.SUCCESS + else: + test_case.status = TestStatus.FAILURE + return True + else: + return False + +SUBTEST_DIAGNOSTIC = re.compile(r'^\t# .*?: (.*)$') +DIAGNOSTIC_CRASH_MESSAGE = 'kunit test case crashed!' + +def parse_diagnostic(lines: List[str], test_case: TestCase) -> bool: + save_non_diagnositic(lines, test_case) + if not lines: + return False + line = lines[0] + match = SUBTEST_DIAGNOSTIC.match(line) + if match: + test_case.log.append(lines.pop(0)) + if match.group(1) == DIAGNOSTIC_CRASH_MESSAGE: + test_case.status = TestStatus.TEST_CRASHED + return True + else: + return False + +def parse_test_case(lines: List[str], expecting_test_case: bool) -> TestCase: + test_case = TestCase() + save_non_diagnositic(lines, test_case) + while parse_diagnostic(lines, test_case): + pass + if parse_ok_not_ok_test_case(lines, test_case, expecting_test_case): + return test_case + else: + return None + +SUBTEST_HEADER = re.compile(r'^\t# Subtest: (.*)$') + +def parse_subtest_header(lines: List[str]) -> str: + consume_non_diagnositic(lines) + if not lines: + return None + match = SUBTEST_HEADER.match(lines[0]) + if match: + lines.pop(0) + return match.group(1) + else: + return None + +SUBTEST_PLAN = re.compile(r'\t[0-9]+..([0-9]+)') + +def parse_subtest_plan(lines: List[str]) -> int: + consume_non_diagnositic(lines) + match = SUBTEST_PLAN.match(lines[0]) + if match: + lines.pop(0) + return int(match.group(1)) + else: + return None + +def max_status(left: TestStatus, right: TestStatus) -> TestStatus: + if left == TestStatus.TEST_CRASHED or right == TestStatus.TEST_CRASHED: + return TestStatus.TEST_CRASHED + elif left == TestStatus.FAILURE or right == TestStatus.FAILURE: + return TestStatus.FAILURE + elif left != TestStatus.SUCCESS: + return left + elif right != TestStatus.SUCCESS: + return right + else: + return TestStatus.SUCCESS + +def parse_ok_not_ok_test_suite(lines: List[str], test_suite: TestSuite) -> bool: + consume_non_diagnositic(lines) + if not lines: + test_suite.status = TestStatus.TEST_CRASHED + return False + line = lines[0] + match = OK_NOT_OK_MODULE.match(line) + if match: + lines.pop(0) + if match.group(1) == 'ok': + test_suite.status = TestStatus.SUCCESS + else: + test_suite.status = TestStatus.FAILURE + return True + else: + return False + +def bubble_up_errors(to_status, status_container_list) -> TestStatus: + status_list = map(to_status, status_container_list) + return reduce(max_status, status_list, TestStatus.SUCCESS) + +def bubble_up_test_case_errors(test_suite: TestSuite) -> TestStatus: + max_test_case_status = bubble_up_errors(lambda x: x.status, test_suite.cases) + return max_status(max_test_case_status, test_suite.status) + +def parse_test_suite(lines: List[str]) -> TestSuite: + if not lines: + return None + consume_non_diagnositic(lines) + test_suite = TestSuite() + test_suite.status = TestStatus.SUCCESS + name = parse_subtest_header(lines) + if not name: + return None + test_suite.name = name + expected_test_case_num = parse_subtest_plan(lines) + if not expected_test_case_num: + return None + test_case = parse_test_case(lines, expected_test_case_num > 0) + expected_test_case_num -= 1 + while test_case: + test_suite.cases.append(test_case) + test_case = parse_test_case(lines, expected_test_case_num > 0) + expected_test_case_num -= 1 + if parse_ok_not_ok_test_suite(lines, test_suite): + test_suite.status = bubble_up_test_case_errors(test_suite) + return test_suite + elif not lines: + print_with_timestamp(red('[ERROR] ') + 'ran out of lines before end token') + return test_suite + else: + print('failed to parse end of suite' + lines[0]) + return None + +TAP_HEADER = re.compile(r'^TAP version 14$') + +def parse_tap_header(lines: List[str]) -> bool: + consume_non_diagnositic(lines) + if TAP_HEADER.match(lines[0]): + lines.pop(0) + return True + else: + return False + +def bubble_up_suite_errors(test_suite_list: List[TestSuite]) -> TestStatus: + return bubble_up_errors(lambda x: x.status, test_suite_list) + +def parse_test_result(lines: List[str]) -> TestResult: + if not lines: + return TestResult(TestStatus.NO_TESTS, [], lines) + consume_non_diagnositic(lines) + if not parse_tap_header(lines): + return None + test_suites = [] + test_suite = parse_test_suite(lines) + while test_suite: + test_suites.append(test_suite) + test_suite = parse_test_suite(lines) + return TestResult(bubble_up_suite_errors(test_suites), test_suites, lines) + +def parse_run_tests(kernel_output) -> TestResult: + total_tests = 0 + failed_tests = 0 + crashed_tests = 0 + test_result = parse_test_result(list(isolate_kunit_output(kernel_output))) + for test_suite in test_result.suites: + if test_suite.status == TestStatus.SUCCESS: + print_suite_divider(green('[PASSED] ') + test_suite.name) + elif test_suite.status == TestStatus.TEST_CRASHED: + print_suite_divider(red('[CRASHED] ' + test_suite.name)) + else: + print_suite_divider(red('[FAILED] ') + test_suite.name) + for test_case in test_suite.cases: + total_tests += 1 + if test_case.status == TestStatus.SUCCESS: + print_with_timestamp(green('[PASSED] ') + test_case.name) + elif test_case.status == TestStatus.TEST_CRASHED: + crashed_tests += 1 + print_with_timestamp(red('[CRASHED] ' + test_case.name)) + print_log(map(yellow, test_case.log)) + print_with_timestamp('') + else: + failed_tests += 1 + print_with_timestamp(red('[FAILED] ') + test_case.name) + print_log(map(yellow, test_case.log)) + print_with_timestamp('') + print_with_timestamp(DIVIDER) + fmt = green if test_result.status == TestStatus.SUCCESS else red + print_with_timestamp( + fmt('Testing complete. %d tests run. %d failed. %d crashed.' % + (total_tests, failed_tests, crashed_tests))) + return test_result diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py new file mode 100755 index 0000000000000..4a12baa0cd4e0 --- /dev/null +++ b/tools/testing/kunit/kunit_tool_test.py @@ -0,0 +1,206 @@ +#!/usr/bin/python3 +# SPDX-License-Identifier: GPL-2.0 +# +# A collection of tests for tools/testing/kunit/kunit.py +# +# Copyright (C) 2019, Google LLC. +# Author: Brendan Higgins brendanhiggins@google.com + +import unittest +from unittest import mock + +import tempfile, shutil # Handling test_tmpdir + +import os + +import kunit_config +import kunit_parser +import kunit_kernel +import kunit + +test_tmpdir = '' + +def setUpModule(): + global test_tmpdir + test_tmpdir = tempfile.mkdtemp() + +def tearDownModule(): + shutil.rmtree(test_tmpdir) + +def get_absolute_path(path): + return os.path.join(os.path.dirname(__file__), path) + +class KconfigTest(unittest.TestCase): + + def test_is_subset_of(self): + kconfig0 = kunit_config.Kconfig() + self.assertTrue(kconfig0.is_subset_of(kconfig0)) + + kconfig1 = kunit_config.Kconfig() + kconfig1.add_entry(kunit_config.KconfigEntry('CONFIG_TEST=y')) + self.assertTrue(kconfig1.is_subset_of(kconfig1)) + self.assertTrue(kconfig0.is_subset_of(kconfig1)) + self.assertFalse(kconfig1.is_subset_of(kconfig0)) + + def test_read_from_file(self): + kconfig = kunit_config.Kconfig() + kconfig_path = get_absolute_path( + 'test_data/test_read_from_file.kconfig') + + kconfig.read_from_file(kconfig_path) + + expected_kconfig = kunit_config.Kconfig() + expected_kconfig.add_entry( + kunit_config.KconfigEntry('CONFIG_UML=y')) + expected_kconfig.add_entry( + kunit_config.KconfigEntry('CONFIG_MMU=y')) + expected_kconfig.add_entry( + kunit_config.KconfigEntry('CONFIG_TEST=y')) + expected_kconfig.add_entry( + kunit_config.KconfigEntry('CONFIG_EXAMPLE_TEST=y')) + expected_kconfig.add_entry( + kunit_config.KconfigEntry('# CONFIG_MK8 is not set')) + + self.assertEqual(kconfig.entries(), expected_kconfig.entries()) + + def test_write_to_file(self): + kconfig_path = os.path.join(test_tmpdir, '.config') + + expected_kconfig = kunit_config.Kconfig() + expected_kconfig.add_entry( + kunit_config.KconfigEntry('CONFIG_UML=y')) + expected_kconfig.add_entry( + kunit_config.KconfigEntry('CONFIG_MMU=y')) + expected_kconfig.add_entry( + kunit_config.KconfigEntry('CONFIG_TEST=y')) + expected_kconfig.add_entry( + kunit_config.KconfigEntry('CONFIG_EXAMPLE_TEST=y')) + expected_kconfig.add_entry( + kunit_config.KconfigEntry('# CONFIG_MK8 is not set')) + + expected_kconfig.write_to_file(kconfig_path) + + actual_kconfig = kunit_config.Kconfig() + actual_kconfig.read_from_file(kconfig_path) + + self.assertEqual(actual_kconfig.entries(), + expected_kconfig.entries()) + +class KUnitParserTest(unittest.TestCase): + + def assertContains(self, needle, haystack): + for line in haystack: + if needle in line: + return + raise AssertionError('"' + + str(needle) + '" not found in "' + str(haystack) + '"!') + + def test_output_isolated_correctly(self): + log_path = get_absolute_path( + 'test_data/test_output_isolated_correctly.log') + file = open(log_path) + result = kunit_parser.isolate_kunit_output(file.readlines()) + self.assertContains('TAP version 14\n', result) + self.assertContains(' # Subtest: example', result) + self.assertContains(' 1..2', result) + self.assertContains(' ok 1 - example_simple_test', result) + self.assertContains(' ok 2 - example_mock_test', result) + self.assertContains('ok 1 - example', result) + file.close() + + def test_parse_successful_test_log(self): + all_passed_log = get_absolute_path( + 'test_data/test_is_test_passed-all_passed.log') + file = open(all_passed_log) + result = kunit_parser.parse_run_tests(file.readlines()) + self.assertEqual( + kunit_parser.TestStatus.SUCCESS, + result.status) + file.close() + + def test_parse_failed_test_log(self): + failed_log = get_absolute_path( + 'test_data/test_is_test_passed-failure.log') + file = open(failed_log) + result = kunit_parser.parse_run_tests(file.readlines()) + self.assertEqual( + kunit_parser.TestStatus.FAILURE, + result.status) + file.close() + + def test_no_tests(self): + empty_log = get_absolute_path( + 'test_data/test_is_test_passed-no_tests_run.log') + file = open(empty_log) + result = kunit_parser.parse_run_tests( + kunit_parser.isolate_kunit_output(file.readlines())) + self.assertEqual(0, len(result.suites)) + self.assertEqual( + kunit_parser.TestStatus.NO_TESTS, + result.status) + file.close() + + def test_crashed_test(self): + crashed_log = get_absolute_path( + 'test_data/test_is_test_passed-crash.log') + file = open(crashed_log) + result = kunit_parser.parse_run_tests(file.readlines()) + self.assertEqual( + kunit_parser.TestStatus.TEST_CRASHED, + result.status) + file.close() + +class StrContains(str): + def __eq__(self, other): + return self in other + +class KUnitMainTest(unittest.TestCase): + def setUp(self): + path = get_absolute_path('test_data/test_is_test_passed-all_passed.log') + file = open(path) + all_passed_log = file.readlines() + self.print_patch = mock.patch('builtins.print') + self.print_mock = self.print_patch.start() + self.linux_source_mock = mock.Mock() + self.linux_source_mock.build_reconfig = mock.Mock(return_value=True) + self.linux_source_mock.build_um_kernel = mock.Mock(return_value=True) + self.linux_source_mock.run_kernel = mock.Mock(return_value=all_passed_log) + + def tearDown(self): + self.print_patch.stop() + pass + + def test_run_passes_args_pass(self): + kunit.main(['run'], self.linux_source_mock) + assert self.linux_source_mock.build_reconfig.call_count == 1 + assert self.linux_source_mock.run_kernel.call_count == 1 + self.print_mock.assert_any_call(StrContains('Testing complete.')) + + def test_run_passes_args_fail(self): + self.linux_source_mock.run_kernel = mock.Mock(return_value=[]) + with self.assertRaises(SystemExit) as e: + kunit.main(['run'], self.linux_source_mock) + assert type(e.exception) == SystemExit + assert e.exception.code == 1 + assert self.linux_source_mock.build_reconfig.call_count == 1 + assert self.linux_source_mock.run_kernel.call_count == 1 + self.print_mock.assert_any_call(StrContains(' 0 tests run')) + + def test_run_raw_output(self): + self.linux_source_mock.run_kernel = mock.Mock(return_value=[]) + kunit.main(['run', '--raw_output'], self.linux_source_mock) + assert self.linux_source_mock.build_reconfig.call_count == 1 + assert self.linux_source_mock.run_kernel.call_count == 1 + for kall in self.print_mock.call_args_list: + assert kall != mock.call(StrContains('Testing complete.')) + assert kall != mock.call(StrContains(' 0 tests run')) + + def test_run_timeout(self): + timeout = 3453 + kunit.main(['run', '--timeout', str(timeout)], self.linux_source_mock) + assert self.linux_source_mock.build_reconfig.call_count == 1 + self.linux_source_mock.run_kernel.assert_called_once_with(timeout=timeout) + self.print_mock.assert_any_call(StrContains('Testing complete.')) + +if __name__ == '__main__': + unittest.main() diff --git a/tools/testing/kunit/test_data/test_is_test_passed-all_passed.log b/tools/testing/kunit/test_data/test_is_test_passed-all_passed.log new file mode 100644 index 0000000000000..62ebc0288355c --- /dev/null +++ b/tools/testing/kunit/test_data/test_is_test_passed-all_passed.log @@ -0,0 +1,32 @@ +TAP version 14 + # Subtest: sysctl_test + 1..8 + # sysctl_test_dointvec_null_tbl_data: sysctl_test_dointvec_null_tbl_data passed + ok 1 - sysctl_test_dointvec_null_tbl_data + # sysctl_test_dointvec_table_maxlen_unset: sysctl_test_dointvec_table_maxlen_unset passed + ok 2 - sysctl_test_dointvec_table_maxlen_unset + # sysctl_test_dointvec_table_len_is_zero: sysctl_test_dointvec_table_len_is_zero passed + ok 3 - sysctl_test_dointvec_table_len_is_zero + # sysctl_test_dointvec_table_read_but_position_set: sysctl_test_dointvec_table_read_but_position_set passed + ok 4 - sysctl_test_dointvec_table_read_but_position_set + # sysctl_test_dointvec_happy_single_positive: sysctl_test_dointvec_happy_single_positive passed + ok 5 - sysctl_test_dointvec_happy_single_positive + # sysctl_test_dointvec_happy_single_negative: sysctl_test_dointvec_happy_single_negative passed + ok 6 - sysctl_test_dointvec_happy_single_negative + # sysctl_test_dointvec_single_less_int_min: sysctl_test_dointvec_single_less_int_min passed + ok 7 - sysctl_test_dointvec_single_less_int_min + # sysctl_test_dointvec_single_greater_int_max: sysctl_test_dointvec_single_greater_int_max passed + ok 8 - sysctl_test_dointvec_single_greater_int_max +kunit sysctl_test: all tests passed +ok 1 - sysctl_test + # Subtest: example + 1..2 +init_suite + # example_simple_test: initializing + # example_simple_test: example_simple_test passed + ok 1 - example_simple_test + # example_mock_test: initializing + # example_mock_test: example_mock_test passed + ok 2 - example_mock_test +kunit example: all tests passed +ok 2 - example diff --git a/tools/testing/kunit/test_data/test_is_test_passed-crash.log b/tools/testing/kunit/test_data/test_is_test_passed-crash.log new file mode 100644 index 0000000000000..0b249870c8be4 --- /dev/null +++ b/tools/testing/kunit/test_data/test_is_test_passed-crash.log @@ -0,0 +1,69 @@ +printk: console [tty0] enabled +printk: console [mc-1] enabled +TAP version 14 + # Subtest: sysctl_test + 1..8 + # sysctl_test_dointvec_null_tbl_data: sysctl_test_dointvec_null_tbl_data passed + ok 1 - sysctl_test_dointvec_null_tbl_data + # sysctl_test_dointvec_table_maxlen_unset: sysctl_test_dointvec_table_maxlen_unset passed + ok 2 - sysctl_test_dointvec_table_maxlen_unset + # sysctl_test_dointvec_table_len_is_zero: sysctl_test_dointvec_table_len_is_zero passed + ok 3 - sysctl_test_dointvec_table_len_is_zero + # sysctl_test_dointvec_table_read_but_position_set: sysctl_test_dointvec_table_read_but_position_set passed + ok 4 - sysctl_test_dointvec_table_read_but_position_set + # sysctl_test_dointvec_happy_single_positive: sysctl_test_dointvec_happy_single_positive passed + ok 5 - sysctl_test_dointvec_happy_single_positive + # sysctl_test_dointvec_happy_single_negative: sysctl_test_dointvec_happy_single_negative passed + ok 6 - sysctl_test_dointvec_happy_single_negative + # sysctl_test_dointvec_single_less_int_min: sysctl_test_dointvec_single_less_int_min passed + ok 7 - sysctl_test_dointvec_single_less_int_min + # sysctl_test_dointvec_single_greater_int_max: sysctl_test_dointvec_single_greater_int_max passed + ok 8 - sysctl_test_dointvec_single_greater_int_max +kunit sysctl_test: all tests passed +ok 1 - sysctl_test + # Subtest: example + 1..2 +init_suite + # example_simple_test: initializing +Stack: + 6016f7db 6f81bd30 6f81bdd0 60021450 + 6024b0e8 60021440 60018bbe 16f81bdc0 + 00000001 6f81bd30 6f81bd20 6f81bdd0 +Call Trace: + [<6016f7db>] ? kunit_try_run_case+0xab/0xf0 + [<60021450>] ? set_signals+0x0/0x60 + [<60021440>] ? get_signals+0x0/0x10 + [<60018bbe>] ? kunit_um_run_try_catch+0x5e/0xc0 + [<60021450>] ? set_signals+0x0/0x60 + [<60021440>] ? get_signals+0x0/0x10 + [<60018bb3>] ? kunit_um_run_try_catch+0x53/0xc0 + [<6016f321>] ? kunit_run_case_catch_errors+0x121/0x1a0 + [<60018b60>] ? kunit_um_run_try_catch+0x0/0xc0 + [<600189e0>] ? kunit_um_throw+0x0/0x180 + [<6016f730>] ? kunit_try_run_case+0x0/0xf0 + [<6016f600>] ? kunit_catch_run_case+0x0/0x130 + [<6016edd0>] ? kunit_vprintk+0x0/0x30 + [<6016ece0>] ? kunit_fail+0x0/0x40 + [<6016eca0>] ? kunit_abort+0x0/0x40 + [<6016ed20>] ? kunit_printk_emit+0x0/0xb0 + [<6016f200>] ? kunit_run_case_catch_errors+0x0/0x1a0 + [<6016f46e>] ? kunit_run_tests+0xce/0x260 + [<6005b390>] ? unregister_console+0x0/0x190 + [<60175b70>] ? suite_kunit_initexample_test_suite+0x0/0x20 + [<60001cbb>] ? do_one_initcall+0x0/0x197 + [<60001d47>] ? do_one_initcall+0x8c/0x197 + [<6005cd20>] ? irq_to_desc+0x0/0x30 + [<60002005>] ? kernel_init_freeable+0x1b3/0x272 + [<6005c5ec>] ? printk+0x0/0x9b + [<601c0086>] ? kernel_init+0x26/0x160 + [<60014442>] ? new_thread_handler+0x82/0xc0 + + # example_simple_test: kunit test case crashed! + # example_simple_test: example_simple_test failed + not ok 1 - example_simple_test + # example_mock_test: initializing + # example_mock_test: example_mock_test passed + ok 2 - example_mock_test +kunit example: one or more tests failed +not ok 2 - example +List of all partitions: diff --git a/tools/testing/kunit/test_data/test_is_test_passed-failure.log b/tools/testing/kunit/test_data/test_is_test_passed-failure.log new file mode 100644 index 0000000000000..2ed870b6de72f --- /dev/null +++ b/tools/testing/kunit/test_data/test_is_test_passed-failure.log @@ -0,0 +1,36 @@ +TAP version 14 + # Subtest: sysctl_test + 1..8 + # sysctl_test_dointvec_null_tbl_data: sysctl_test_dointvec_null_tbl_data passed + ok 1 - sysctl_test_dointvec_null_tbl_data + # sysctl_test_dointvec_table_maxlen_unset: sysctl_test_dointvec_table_maxlen_unset passed + ok 2 - sysctl_test_dointvec_table_maxlen_unset + # sysctl_test_dointvec_table_len_is_zero: sysctl_test_dointvec_table_len_is_zero passed + ok 3 - sysctl_test_dointvec_table_len_is_zero + # sysctl_test_dointvec_table_read_but_position_set: sysctl_test_dointvec_table_read_but_position_set passed + ok 4 - sysctl_test_dointvec_table_read_but_position_set + # sysctl_test_dointvec_happy_single_positive: sysctl_test_dointvec_happy_single_positive passed + ok 5 - sysctl_test_dointvec_happy_single_positive + # sysctl_test_dointvec_happy_single_negative: sysctl_test_dointvec_happy_single_negative passed + ok 6 - sysctl_test_dointvec_happy_single_negative + # sysctl_test_dointvec_single_less_int_min: sysctl_test_dointvec_single_less_int_min passed + ok 7 - sysctl_test_dointvec_single_less_int_min + # sysctl_test_dointvec_single_greater_int_max: sysctl_test_dointvec_single_greater_int_max passed + ok 8 - sysctl_test_dointvec_single_greater_int_max +kunit sysctl_test: all tests passed +ok 1 - sysctl_test + # Subtest: example + 1..2 +init_suite + # example_simple_test: initializing + # example_simple_test: EXPECTATION FAILED at kunit/example-test.c:30 + Expected 1 + 1 == 3, but + 1 + 1 == 2 + 3 == 3 + # example_simple_test: example_simple_test failed + not ok 1 - example_simple_test + # example_mock_test: initializing + # example_mock_test: example_mock_test passed + ok 2 - example_mock_test +kunit example: one or more tests failed +not ok 2 - example diff --git a/tools/testing/kunit/test_data/test_is_test_passed-no_tests_run.log b/tools/testing/kunit/test_data/test_is_test_passed-no_tests_run.log new file mode 100644 index 0000000000000..ba69f5c94b75f --- /dev/null +++ b/tools/testing/kunit/test_data/test_is_test_passed-no_tests_run.log @@ -0,0 +1,75 @@ +Core dump limits : + soft - 0 + hard - NONE +Checking environment variables for a tempdir...none found +Checking if /dev/shm is on tmpfs...OK +Checking PROT_EXEC mmap in /dev/shm...OK +Adding 24743936 bytes to physical memory to account for exec-shield gap +Linux version 4.12.0-rc3-00010-g7319eb35f493-dirty (brendanhiggins@mactruck.svl.corp.google.com) (gcc version 7.3.0 (Debian 7.3.0-5) ) #29 Thu Mar 15 14:57:19 PDT 2018 +Built 1 zonelists in Zone order, mobility grouping on. Total pages: 14038 +Kernel command line: root=98:0 +PID hash table entries: 256 (order: -1, 2048 bytes) +Dentry cache hash table entries: 8192 (order: 4, 65536 bytes) +Inode-cache hash table entries: 4096 (order: 3, 32768 bytes) +Memory: 27868K/56932K available (1681K kernel code, 480K rwdata, 400K rodata, 89K init, 205K bss, 29064K reserved, 0K cma-reserved) +SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 +NR_IRQS:15 +clocksource: timer: mask: 0xffffffffffffffff max_cycles: 0x1cd42e205, max_idle_ns: 881590404426 ns +Calibrating delay loop... 7384.26 BogoMIPS (lpj=36921344) +pid_max: default: 32768 minimum: 301 +Mount-cache hash table entries: 512 (order: 0, 4096 bytes) +Mountpoint-cache hash table entries: 512 (order: 0, 4096 bytes) +Checking that host ptys support output SIGIO...Yes +Checking that host ptys support SIGIO on close...No, enabling workaround +Using 2.6 host AIO +clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns +futex hash table entries: 256 (order: 0, 6144 bytes) +clocksource: Switched to clocksource timer +console [stderr0] disabled +mconsole (version 2) initialized on /usr/local/google/home/brendanhiggins/.uml/6Ijecl/mconsole +Checking host MADV_REMOVE support...OK +workingset: timestamp_bits=62 max_order=13 bucket_order=0 +Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254) +io scheduler noop registered +io scheduler deadline registered +io scheduler cfq registered (default) +io scheduler mq-deadline registered +io scheduler kyber registered +Initialized stdio console driver +Using a channel type which is configured out of UML +setup_one_line failed for device 1 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 2 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 3 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 4 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 5 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 6 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 7 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 8 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 9 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 10 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 11 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 12 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 13 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 14 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 15 : Configuration failed +Console initialized on /dev/tty0 +console [tty0] enabled +console [mc-1] enabled +List of all partitions: +No filesystem could mount root, tried: + +Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(98,0) diff --git a/tools/testing/kunit/test_data/test_output_isolated_correctly.log b/tools/testing/kunit/test_data/test_output_isolated_correctly.log new file mode 100644 index 0000000000000..94a6b3aeaa922 --- /dev/null +++ b/tools/testing/kunit/test_data/test_output_isolated_correctly.log @@ -0,0 +1,106 @@ +Linux version 5.1.0-rc7-00061-g04652f1cb4aa0 (brendanhiggins@mactruck.svl.corp.google.com) (gcc version 7.3.0 (Debian 7.3.0-18)) #163 Wed May 8 16:18:20 PDT 2019 +Built 1 zonelists, mobility grouping on. Total pages: 69906 +Kernel command line: mem=256M root=98:0 +Dentry cache hash table entries: 65536 (order: 7, 524288 bytes) +Inode-cache hash table entries: 32768 (order: 6, 262144 bytes) +Memory: 254468K/283500K available (1734K kernel code, 489K rwdata, 396K rodata, 85K init, 216K bss, 29032K reserved, 0K cma-reserved) +SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 +NR_IRQS: 15 +clocksource: timer: mask: 0xffffffffffffffff max_cycles: 0x1cd42e205, max_idle_ns: 881590404426 ns +------------[ cut here ]------------ +WARNING: CPU: 0 PID: 0 at kernel/time/clockevents.c:458 clockevents_register_device+0x143/0x160 +posix-timer cpumask == cpu_all_mask, using cpu_possible_mask instead +CPU: 0 PID: 0 Comm: swapper Not tainted 5.1.0-rc7-00061-g04652f1cb4aa0 #163 +Stack: + 6005cc00 60233e18 60233e60 60233e18 + 60233e60 00000009 00000000 6002a1b4 + 1ca00000000 60071c23 60233e78 100000000000062 +Call Trace: + [<600214c5>] ? os_is_signal_stack+0x15/0x30 + [<6005c5ec>] ? printk+0x0/0x9b + [<6001597e>] ? show_stack+0xbe/0x1c0 + [<6005cc00>] ? __printk_safe_exit+0x0/0x40 + [<6002a1b4>] ? __warn+0x144/0x170 + [<60071c23>] ? clockevents_register_device+0x143/0x160 + [<60021440>] ? get_signals+0x0/0x10 + [<6005c5ec>] ? printk+0x0/0x9b + [<6002a27b>] ? warn_slowpath_fmt+0x9b/0xb0 + [<6005c5ec>] ? printk+0x0/0x9b + [<6002a1e0>] ? warn_slowpath_fmt+0x0/0xb0 + [<6005c5ec>] ? printk+0x0/0x9b + [<60021440>] ? get_signals+0x0/0x10 + [<600213f0>] ? block_signals+0x0/0x20 + [<60071c23>] ? clockevents_register_device+0x143/0x160 + [<60021440>] ? get_signals+0x0/0x10 + [<600213f0>] ? block_signals+0x0/0x20 + [<6005c5ec>] ? printk+0x0/0x9b + [<60001bc8>] ? start_kernel+0x477/0x56a + [<600036f1>] ? start_kernel_proc+0x46/0x4d + [<60014442>] ? new_thread_handler+0x82/0xc0 + +random: get_random_bytes called from print_oops_end_marker+0x4c/0x60 with crng_init=0 +---[ end trace c83434852b3702d3 ]--- +Calibrating delay loop... 6958.28 BogoMIPS (lpj=34791424) +pid_max: default: 32768 minimum: 301 +Mount-cache hash table entries: 1024 (order: 1, 8192 bytes) +Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes) +*** VALIDATE proc *** +Checking that host ptys support output SIGIO...Yes +Checking that host ptys support SIGIO on close...No, enabling workaround +clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns +futex hash table entries: 256 (order: 0, 6144 bytes) +clocksource: Switched to clocksource timer +printk: console [stderr0] disabled +mconsole (version 2) initialized on /usr/local/google/home/brendanhiggins/.uml/VZ2qMm/mconsole +Checking host MADV_REMOVE support...OK +workingset: timestamp_bits=62 max_order=16 bucket_order=0 +Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254) +io scheduler mq-deadline registered +io scheduler kyber registered +Initialized stdio console driver +Using a channel type which is configured out of UML +setup_one_line failed for device 1 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 2 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 3 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 4 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 5 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 6 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 7 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 8 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 9 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 10 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 11 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 12 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 13 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 14 : Configuration failed +Using a channel type which is configured out of UML +setup_one_line failed for device 15 : Configuration failed +Console initialized on /dev/tty0 +printk: console [tty0] enabled +printk: console [mc-1] enabled +TAP version 14 + # Subtest: example + 1..2 +init_suite + # example_simple_test: initializing + # example_simple_test: example_simple_test passed + ok 1 - example_simple_test + # example_mock_test: initializing + # example_mock_test: example_mock_test passed + ok 2 - example_mock_test +kunit example: all tests passed +ok 1 - example +List of all partitions: diff --git a/tools/testing/kunit/test_data/test_read_from_file.kconfig b/tools/testing/kunit/test_data/test_read_from_file.kconfig new file mode 100644 index 0000000000000..d2a4928ac773b --- /dev/null +++ b/tools/testing/kunit/test_data/test_read_from_file.kconfig @@ -0,0 +1,17 @@ +# +# Automatically generated file; DO NOT EDIT. +# User Mode Linux/x86 4.12.0-rc3 Kernel Configuration +# +CONFIG_UML=y +CONFIG_MMU=y + +# +# UML-specific options +# + +# +# Host processor type and features +# +# CONFIG_MK8 is not set +CONFIG_TEST=y +CONFIG_EXAMPLE_TEST=y

Add myself as maintainer of KUnit, the Linux kernel's unit testing framework.

Signed-off-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com Reviewed-by: Stephen Boyd sboyd@kernel.org --- MAINTAINERS | 11 +++++++++++ 1 file changed, 11 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS index a2c343ee3b2ca..f0bd77e8a8a2f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8799,6 +8799,17 @@ S: Maintained F: tools/testing/selftests/ F: Documentation/dev-tools/kselftest*

+KERNEL UNIT TESTING FRAMEWORK (KUnit) +M: Brendan Higgins brendanhiggins@google.com +L: linux-kselftest@vger.kernel.org +L: kunit-dev@googlegroups.com +W: https://google.github.io/kunit-docs/third_party/kernel/docs/ +S: Maintained +F: Documentation/dev-tools/kunit/ +F: include/kunit/ +F: kunit/ +F: tools/testing/kunit/ + KERNEL USERMODE HELPER M: Luis Chamberlain mcgrof@kernel.org L: linux-kernel@vger.kernel.org

Add entry for the new proc sysctl KUnit test to the PROC SYSCTL section, and add Iurii as a maintainer.

Signed-off-by: Brendan Higgins brendanhiggins@google.com Cc: Iurii Zaikin yzaikin@google.com Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Logan Gunthorpe logang@deltatee.com Acked-by: Luis Chamberlain mcgrof@kernel.org --- MAINTAINERS | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS index f0bd77e8a8a2f..0cac78807137b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12965,12 +12965,14 @@ F: Documentation/filesystems/proc.txt PROC SYSCTL M: Luis Chamberlain mcgrof@kernel.org M: Kees Cook keescook@chromium.org +M: Iurii Zaikin yzaikin@google.com L: linux-kernel@vger.kernel.org L: linux-fsdevel@vger.kernel.org S: Maintained F: fs/proc/proc_sysctl.c F: include/linux/sysctl.h F: kernel/sysctl.c +F: kernel/sysctl-test.c F: tools/testing/selftests/sysctl/

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