linux/tools/testing/selftests/kselftest_harness.h
Li Zhijian 92d25637a3 kselftest: signal all child processes
We have some many cases that will create child process as well, such as
pidfd_wait. Previously, we will signal/kill the parent process when it
is time out, but this signal will not be sent to its child process. In
such case, if child process doesn't terminate itself, ksefltest framework
will hang forever.

Here we group all its child processes so that kill() can signal all of
them in timeout.

Fixed change log: Shuah Khan <skhan@linuxfoundation.org>

Suggested-by: yang xu <xuyang2018.jy@cn.fujitsu.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2022-01-25 13:48:21 -07:00

1073 lines
28 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
*
* kselftest_harness.h: simple C unit test helper.
*
* See documentation in Documentation/dev-tools/kselftest.rst
*
* API inspired by code.google.com/p/googletest
*/
/**
* DOC: example
*
* .. code-block:: c
*
* #include "../kselftest_harness.h"
*
* TEST(standalone_test) {
* do_some_stuff;
* EXPECT_GT(10, stuff) {
* stuff_state_t state;
* enumerate_stuff_state(&state);
* TH_LOG("expectation failed with state: %s", state.msg);
* }
* more_stuff;
* ASSERT_NE(some_stuff, NULL) TH_LOG("how did it happen?!");
* last_stuff;
* EXPECT_EQ(0, last_stuff);
* }
*
* FIXTURE(my_fixture) {
* mytype_t *data;
* int awesomeness_level;
* };
* FIXTURE_SETUP(my_fixture) {
* self->data = mytype_new();
* ASSERT_NE(NULL, self->data);
* }
* FIXTURE_TEARDOWN(my_fixture) {
* mytype_free(self->data);
* }
* TEST_F(my_fixture, data_is_good) {
* EXPECT_EQ(1, is_my_data_good(self->data));
* }
*
* TEST_HARNESS_MAIN
*/
#ifndef __KSELFTEST_HARNESS_H
#define __KSELFTEST_HARNESS_H
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <asm/types.h>
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "kselftest.h"
#define TEST_TIMEOUT_DEFAULT 30
/* Utilities exposed to the test definitions */
#ifndef TH_LOG_STREAM
# define TH_LOG_STREAM stderr
#endif
#ifndef TH_LOG_ENABLED
# define TH_LOG_ENABLED 1
#endif
/**
* TH_LOG()
*
* @fmt: format string
* @...: optional arguments
*
* .. code-block:: c
*
* TH_LOG(format, ...)
*
* Optional debug logging function available for use in tests.
* Logging may be enabled or disabled by defining TH_LOG_ENABLED.
* E.g., #define TH_LOG_ENABLED 1
*
* If no definition is provided, logging is enabled by default.
*
* If there is no way to print an error message for the process running the
* test (e.g. not allowed to write to stderr), it is still possible to get the
* ASSERT_* number for which the test failed. This behavior can be enabled by
* writing `_metadata->no_print = true;` before the check sequence that is
* unable to print. When an error occur, instead of printing an error message
* and calling `abort(3)`, the test process call `_exit(2)` with the assert
* number as argument, which is then printed by the parent process.
*/
#define TH_LOG(fmt, ...) do { \
if (TH_LOG_ENABLED) \
__TH_LOG(fmt, ##__VA_ARGS__); \
} while (0)
/* Unconditional logger for internal use. */
#define __TH_LOG(fmt, ...) \
fprintf(TH_LOG_STREAM, "# %s:%d:%s:" fmt "\n", \
__FILE__, __LINE__, _metadata->name, ##__VA_ARGS__)
/**
* SKIP()
*
* @statement: statement to run after reporting SKIP
* @fmt: format string
* @...: optional arguments
*
* .. code-block:: c
*
* SKIP(statement, fmt, ...);
*
* This forces a "pass" after reporting why something is being skipped
* and runs "statement", which is usually "return" or "goto skip".
*/
#define SKIP(statement, fmt, ...) do { \
snprintf(_metadata->results->reason, \
sizeof(_metadata->results->reason), fmt, ##__VA_ARGS__); \
if (TH_LOG_ENABLED) { \
fprintf(TH_LOG_STREAM, "# SKIP %s\n", \
_metadata->results->reason); \
} \
_metadata->passed = 1; \
_metadata->skip = 1; \
_metadata->trigger = 0; \
statement; \
} while (0)
/**
* TEST() - Defines the test function and creates the registration
* stub
*
* @test_name: test name
*
* .. code-block:: c
*
* TEST(name) { implementation }
*
* Defines a test by name.
* Names must be unique and tests must not be run in parallel. The
* implementation containing block is a function and scoping should be treated
* as such. Returning early may be performed with a bare "return;" statement.
*
* EXPECT_* and ASSERT_* are valid in a TEST() { } context.
*/
#define TEST(test_name) __TEST_IMPL(test_name, -1)
/**
* TEST_SIGNAL()
*
* @test_name: test name
* @signal: signal number
*
* .. code-block:: c
*
* TEST_SIGNAL(name, signal) { implementation }
*
* Defines a test by name and the expected term signal.
* Names must be unique and tests must not be run in parallel. The
* implementation containing block is a function and scoping should be treated
* as such. Returning early may be performed with a bare "return;" statement.
*
* EXPECT_* and ASSERT_* are valid in a TEST() { } context.
*/
#define TEST_SIGNAL(test_name, signal) __TEST_IMPL(test_name, signal)
#define __TEST_IMPL(test_name, _signal) \
static void test_name(struct __test_metadata *_metadata); \
static inline void wrapper_##test_name( \
struct __test_metadata *_metadata, \
struct __fixture_variant_metadata *variant) \
{ \
test_name(_metadata); \
} \
static struct __test_metadata _##test_name##_object = \
{ .name = #test_name, \
.fn = &wrapper_##test_name, \
.fixture = &_fixture_global, \
.termsig = _signal, \
.timeout = TEST_TIMEOUT_DEFAULT, }; \
static void __attribute__((constructor)) _register_##test_name(void) \
{ \
__register_test(&_##test_name##_object); \
} \
static void test_name( \
struct __test_metadata __attribute__((unused)) *_metadata)
/**
* FIXTURE_DATA() - Wraps the struct name so we have one less
* argument to pass around
*
* @datatype_name: datatype name
*
* .. code-block:: c
*
* FIXTURE_DATA(datatype_name)
*
* Almost always, you want just FIXTURE() instead (see below).
* This call may be used when the type of the fixture data
* is needed. In general, this should not be needed unless
* the *self* is being passed to a helper directly.
*/
#define FIXTURE_DATA(datatype_name) struct _test_data_##datatype_name
/**
* FIXTURE() - Called once per fixture to setup the data and
* register
*
* @fixture_name: fixture name
*
* .. code-block:: c
*
* FIXTURE(fixture_name) {
* type property1;
* ...
* };
*
* Defines the data provided to TEST_F()-defined tests as *self*. It should be
* populated and cleaned up using FIXTURE_SETUP() and FIXTURE_TEARDOWN().
*/
#define FIXTURE(fixture_name) \
FIXTURE_VARIANT(fixture_name); \
static struct __fixture_metadata _##fixture_name##_fixture_object = \
{ .name = #fixture_name, }; \
static void __attribute__((constructor)) \
_register_##fixture_name##_data(void) \
{ \
__register_fixture(&_##fixture_name##_fixture_object); \
} \
FIXTURE_DATA(fixture_name)
/**
* FIXTURE_SETUP() - Prepares the setup function for the fixture.
* *_metadata* is included so that EXPECT_* and ASSERT_* work correctly.
*
* @fixture_name: fixture name
*
* .. code-block:: c
*
* FIXTURE_SETUP(fixture_name) { implementation }
*
* Populates the required "setup" function for a fixture. An instance of the
* datatype defined with FIXTURE_DATA() will be exposed as *self* for the
* implementation.
*
* ASSERT_* are valid for use in this context and will prempt the execution
* of any dependent fixture tests.
*
* A bare "return;" statement may be used to return early.
*/
#define FIXTURE_SETUP(fixture_name) \
void fixture_name##_setup( \
struct __test_metadata __attribute__((unused)) *_metadata, \
FIXTURE_DATA(fixture_name) __attribute__((unused)) *self, \
const FIXTURE_VARIANT(fixture_name) \
__attribute__((unused)) *variant)
/**
* FIXTURE_TEARDOWN()
* *_metadata* is included so that EXPECT_* and ASSERT_* work correctly.
*
* @fixture_name: fixture name
*
* .. code-block:: c
*
* FIXTURE_TEARDOWN(fixture_name) { implementation }
*
* Populates the required "teardown" function for a fixture. An instance of the
* datatype defined with FIXTURE_DATA() will be exposed as *self* for the
* implementation to clean up.
*
* A bare "return;" statement may be used to return early.
*/
#define FIXTURE_TEARDOWN(fixture_name) \
void fixture_name##_teardown( \
struct __test_metadata __attribute__((unused)) *_metadata, \
FIXTURE_DATA(fixture_name) __attribute__((unused)) *self)
/**
* FIXTURE_VARIANT() - Optionally called once per fixture
* to declare fixture variant
*
* @fixture_name: fixture name
*
* .. code-block:: c
*
* FIXTURE_VARIANT(fixture_name) {
* type property1;
* ...
* };
*
* Defines type of constant parameters provided to FIXTURE_SETUP() and TEST_F()
* as *variant*. Variants allow the same tests to be run with different
* arguments.
*/
#define FIXTURE_VARIANT(fixture_name) struct _fixture_variant_##fixture_name
/**
* FIXTURE_VARIANT_ADD() - Called once per fixture
* variant to setup and register the data
*
* @fixture_name: fixture name
* @variant_name: name of the parameter set
*
* .. code-block:: c
*
* FIXTURE_VARIANT_ADD(fixture_name, variant_name) {
* .property1 = val1,
* ...
* };
*
* Defines a variant of the test fixture, provided to FIXTURE_SETUP() and
* TEST_F() as *variant*. Tests of each fixture will be run once for each
* variant.
*/
#define FIXTURE_VARIANT_ADD(fixture_name, variant_name) \
extern FIXTURE_VARIANT(fixture_name) \
_##fixture_name##_##variant_name##_variant; \
static struct __fixture_variant_metadata \
_##fixture_name##_##variant_name##_object = \
{ .name = #variant_name, \
.data = &_##fixture_name##_##variant_name##_variant}; \
static void __attribute__((constructor)) \
_register_##fixture_name##_##variant_name(void) \
{ \
__register_fixture_variant(&_##fixture_name##_fixture_object, \
&_##fixture_name##_##variant_name##_object); \
} \
FIXTURE_VARIANT(fixture_name) \
_##fixture_name##_##variant_name##_variant =
/**
* TEST_F() - Emits test registration and helpers for
* fixture-based test cases
*
* @fixture_name: fixture name
* @test_name: test name
*
* .. code-block:: c
*
* TEST_F(fixture, name) { implementation }
*
* Defines a test that depends on a fixture (e.g., is part of a test case).
* Very similar to TEST() except that *self* is the setup instance of fixture's
* datatype exposed for use by the implementation.
*
* Warning: use of ASSERT_* here will skip TEARDOWN.
*/
/* TODO(wad) register fixtures on dedicated test lists. */
#define TEST_F(fixture_name, test_name) \
__TEST_F_IMPL(fixture_name, test_name, -1, TEST_TIMEOUT_DEFAULT)
#define TEST_F_SIGNAL(fixture_name, test_name, signal) \
__TEST_F_IMPL(fixture_name, test_name, signal, TEST_TIMEOUT_DEFAULT)
#define TEST_F_TIMEOUT(fixture_name, test_name, timeout) \
__TEST_F_IMPL(fixture_name, test_name, -1, timeout)
#define __TEST_F_IMPL(fixture_name, test_name, signal, tmout) \
static void fixture_name##_##test_name( \
struct __test_metadata *_metadata, \
FIXTURE_DATA(fixture_name) *self, \
const FIXTURE_VARIANT(fixture_name) *variant); \
static inline void wrapper_##fixture_name##_##test_name( \
struct __test_metadata *_metadata, \
struct __fixture_variant_metadata *variant) \
{ \
/* fixture data is alloced, setup, and torn down per call. */ \
FIXTURE_DATA(fixture_name) self; \
memset(&self, 0, sizeof(FIXTURE_DATA(fixture_name))); \
fixture_name##_setup(_metadata, &self, variant->data); \
/* Let setup failure terminate early. */ \
if (!_metadata->passed) \
return; \
fixture_name##_##test_name(_metadata, &self, variant->data); \
fixture_name##_teardown(_metadata, &self); \
} \
static struct __test_metadata \
_##fixture_name##_##test_name##_object = { \
.name = #test_name, \
.fn = &wrapper_##fixture_name##_##test_name, \
.fixture = &_##fixture_name##_fixture_object, \
.termsig = signal, \
.timeout = tmout, \
}; \
static void __attribute__((constructor)) \
_register_##fixture_name##_##test_name(void) \
{ \
__register_test(&_##fixture_name##_##test_name##_object); \
} \
static void fixture_name##_##test_name( \
struct __test_metadata __attribute__((unused)) *_metadata, \
FIXTURE_DATA(fixture_name) __attribute__((unused)) *self, \
const FIXTURE_VARIANT(fixture_name) \
__attribute__((unused)) *variant)
/**
* TEST_HARNESS_MAIN - Simple wrapper to run the test harness
*
* .. code-block:: c
*
* TEST_HARNESS_MAIN
*
* Use once to append a main() to the test file.
*/
#define TEST_HARNESS_MAIN \
static void __attribute__((constructor)) \
__constructor_order_last(void) \
{ \
if (!__constructor_order) \
__constructor_order = _CONSTRUCTOR_ORDER_BACKWARD; \
} \
int main(int argc, char **argv) { \
return test_harness_run(argc, argv); \
}
/**
* DOC: operators
*
* Operators for use in TEST() and TEST_F().
* ASSERT_* calls will stop test execution immediately.
* EXPECT_* calls will emit a failure warning, note it, and continue.
*/
/**
* ASSERT_EQ()
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_EQ(expected, measured): expected == measured
*/
#define ASSERT_EQ(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, ==, 1)
/**
* ASSERT_NE()
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_NE(expected, measured): expected != measured
*/
#define ASSERT_NE(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, !=, 1)
/**
* ASSERT_LT()
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_LT(expected, measured): expected < measured
*/
#define ASSERT_LT(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, <, 1)
/**
* ASSERT_LE()
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_LE(expected, measured): expected <= measured
*/
#define ASSERT_LE(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, <=, 1)
/**
* ASSERT_GT()
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_GT(expected, measured): expected > measured
*/
#define ASSERT_GT(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, >, 1)
/**
* ASSERT_GE()
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_GE(expected, measured): expected >= measured
*/
#define ASSERT_GE(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, >=, 1)
/**
* ASSERT_NULL()
*
* @seen: measured value
*
* ASSERT_NULL(measured): NULL == measured
*/
#define ASSERT_NULL(seen) \
__EXPECT(NULL, "NULL", seen, #seen, ==, 1)
/**
* ASSERT_TRUE()
*
* @seen: measured value
*
* ASSERT_TRUE(measured): measured != 0
*/
#define ASSERT_TRUE(seen) \
__EXPECT(0, "0", seen, #seen, !=, 1)
/**
* ASSERT_FALSE()
*
* @seen: measured value
*
* ASSERT_FALSE(measured): measured == 0
*/
#define ASSERT_FALSE(seen) \
__EXPECT(0, "0", seen, #seen, ==, 1)
/**
* ASSERT_STREQ()
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_STREQ(expected, measured): !strcmp(expected, measured)
*/
#define ASSERT_STREQ(expected, seen) \
__EXPECT_STR(expected, seen, ==, 1)
/**
* ASSERT_STRNE()
*
* @expected: expected value
* @seen: measured value
*
* ASSERT_STRNE(expected, measured): strcmp(expected, measured)
*/
#define ASSERT_STRNE(expected, seen) \
__EXPECT_STR(expected, seen, !=, 1)
/**
* EXPECT_EQ()
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_EQ(expected, measured): expected == measured
*/
#define EXPECT_EQ(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, ==, 0)
/**
* EXPECT_NE()
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_NE(expected, measured): expected != measured
*/
#define EXPECT_NE(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, !=, 0)
/**
* EXPECT_LT()
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_LT(expected, measured): expected < measured
*/
#define EXPECT_LT(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, <, 0)
/**
* EXPECT_LE()
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_LE(expected, measured): expected <= measured
*/
#define EXPECT_LE(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, <=, 0)
/**
* EXPECT_GT()
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_GT(expected, measured): expected > measured
*/
#define EXPECT_GT(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, >, 0)
/**
* EXPECT_GE()
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_GE(expected, measured): expected >= measured
*/
#define EXPECT_GE(expected, seen) \
__EXPECT(expected, #expected, seen, #seen, >=, 0)
/**
* EXPECT_NULL()
*
* @seen: measured value
*
* EXPECT_NULL(measured): NULL == measured
*/
#define EXPECT_NULL(seen) \
__EXPECT(NULL, "NULL", seen, #seen, ==, 0)
/**
* EXPECT_TRUE()
*
* @seen: measured value
*
* EXPECT_TRUE(measured): 0 != measured
*/
#define EXPECT_TRUE(seen) \
__EXPECT(0, "0", seen, #seen, !=, 0)
/**
* EXPECT_FALSE()
*
* @seen: measured value
*
* EXPECT_FALSE(measured): 0 == measured
*/
#define EXPECT_FALSE(seen) \
__EXPECT(0, "0", seen, #seen, ==, 0)
/**
* EXPECT_STREQ()
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_STREQ(expected, measured): !strcmp(expected, measured)
*/
#define EXPECT_STREQ(expected, seen) \
__EXPECT_STR(expected, seen, ==, 0)
/**
* EXPECT_STRNE()
*
* @expected: expected value
* @seen: measured value
*
* EXPECT_STRNE(expected, measured): strcmp(expected, measured)
*/
#define EXPECT_STRNE(expected, seen) \
__EXPECT_STR(expected, seen, !=, 0)
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
#endif
/* Support an optional handler after and ASSERT_* or EXPECT_*. The approach is
* not thread-safe, but it should be fine in most sane test scenarios.
*
* Using __bail(), which optionally abort()s, is the easiest way to early
* return while still providing an optional block to the API consumer.
*/
#define OPTIONAL_HANDLER(_assert) \
for (; _metadata->trigger; _metadata->trigger = \
__bail(_assert, _metadata->no_print, _metadata->step))
#define __INC_STEP(_metadata) \
/* Keep "step" below 255 (which is used for "SKIP" reporting). */ \
if (_metadata->passed && _metadata->step < 253) \
_metadata->step++;
#define is_signed_type(var) (!!(((__typeof__(var))(-1)) < (__typeof__(var))1))
#define __EXPECT(_expected, _expected_str, _seen, _seen_str, _t, _assert) do { \
/* Avoid multiple evaluation of the cases */ \
__typeof__(_expected) __exp = (_expected); \
__typeof__(_seen) __seen = (_seen); \
if (_assert) __INC_STEP(_metadata); \
if (!(__exp _t __seen)) { \
/* Report with actual signedness to avoid weird output. */ \
switch (is_signed_type(__exp) * 2 + is_signed_type(__seen)) { \
case 0: { \
unsigned long long __exp_print = (uintptr_t)__exp; \
unsigned long long __seen_print = (uintptr_t)__seen; \
__TH_LOG("Expected %s (%llu) %s %s (%llu)", \
_expected_str, __exp_print, #_t, \
_seen_str, __seen_print); \
break; \
} \
case 1: { \
unsigned long long __exp_print = (uintptr_t)__exp; \
long long __seen_print = (intptr_t)__seen; \
__TH_LOG("Expected %s (%llu) %s %s (%lld)", \
_expected_str, __exp_print, #_t, \
_seen_str, __seen_print); \
break; \
} \
case 2: { \
long long __exp_print = (intptr_t)__exp; \
unsigned long long __seen_print = (uintptr_t)__seen; \
__TH_LOG("Expected %s (%lld) %s %s (%llu)", \
_expected_str, __exp_print, #_t, \
_seen_str, __seen_print); \
break; \
} \
case 3: { \
long long __exp_print = (intptr_t)__exp; \
long long __seen_print = (intptr_t)__seen; \
__TH_LOG("Expected %s (%lld) %s %s (%lld)", \
_expected_str, __exp_print, #_t, \
_seen_str, __seen_print); \
break; \
} \
} \
_metadata->passed = 0; \
/* Ensure the optional handler is triggered */ \
_metadata->trigger = 1; \
} \
} while (0); OPTIONAL_HANDLER(_assert)
#define __EXPECT_STR(_expected, _seen, _t, _assert) do { \
const char *__exp = (_expected); \
const char *__seen = (_seen); \
if (_assert) __INC_STEP(_metadata); \
if (!(strcmp(__exp, __seen) _t 0)) { \
__TH_LOG("Expected '%s' %s '%s'.", __exp, #_t, __seen); \
_metadata->passed = 0; \
_metadata->trigger = 1; \
} \
} while (0); OPTIONAL_HANDLER(_assert)
/* List helpers */
#define __LIST_APPEND(head, item) \
{ \
/* Circular linked list where only prev is circular. */ \
if (head == NULL) { \
head = item; \
item->next = NULL; \
item->prev = item; \
return; \
} \
if (__constructor_order == _CONSTRUCTOR_ORDER_FORWARD) { \
item->next = NULL; \
item->prev = head->prev; \
item->prev->next = item; \
head->prev = item; \
} else { \
item->next = head; \
item->next->prev = item; \
item->prev = item; \
head = item; \
} \
}
struct __test_results {
char reason[1024]; /* Reason for test result */
};
struct __test_metadata;
struct __fixture_variant_metadata;
/* Contains all the information about a fixture. */
struct __fixture_metadata {
const char *name;
struct __test_metadata *tests;
struct __fixture_variant_metadata *variant;
struct __fixture_metadata *prev, *next;
} _fixture_global __attribute__((unused)) = {
.name = "global",
.prev = &_fixture_global,
};
static struct __fixture_metadata *__fixture_list = &_fixture_global;
static int __constructor_order;
#define _CONSTRUCTOR_ORDER_FORWARD 1
#define _CONSTRUCTOR_ORDER_BACKWARD -1
static inline void __register_fixture(struct __fixture_metadata *f)
{
__LIST_APPEND(__fixture_list, f);
}
struct __fixture_variant_metadata {
const char *name;
const void *data;
struct __fixture_variant_metadata *prev, *next;
};
static inline void
__register_fixture_variant(struct __fixture_metadata *f,
struct __fixture_variant_metadata *variant)
{
__LIST_APPEND(f->variant, variant);
}
/* Contains all the information for test execution and status checking. */
struct __test_metadata {
const char *name;
void (*fn)(struct __test_metadata *,
struct __fixture_variant_metadata *);
pid_t pid; /* pid of test when being run */
struct __fixture_metadata *fixture;
int termsig;
int passed;
int skip; /* did SKIP get used? */
int trigger; /* extra handler after the evaluation */
int timeout; /* seconds to wait for test timeout */
bool timed_out; /* did this test timeout instead of exiting? */
__u8 step;
bool no_print; /* manual trigger when TH_LOG_STREAM is not available */
struct __test_results *results;
struct __test_metadata *prev, *next;
};
/*
* Since constructors are called in reverse order, reverse the test
* list so tests are run in source declaration order.
* https://gcc.gnu.org/onlinedocs/gccint/Initialization.html
* However, it seems not all toolchains do this correctly, so use
* __constructor_order to detect which direction is called first
* and adjust list building logic to get things running in the right
* direction.
*/
static inline void __register_test(struct __test_metadata *t)
{
__LIST_APPEND(t->fixture->tests, t);
}
static inline int __bail(int for_realz, bool no_print, __u8 step)
{
if (for_realz) {
if (no_print)
_exit(step);
abort();
}
return 0;
}
struct __test_metadata *__active_test;
static void __timeout_handler(int sig, siginfo_t *info, void *ucontext)
{
struct __test_metadata *t = __active_test;
/* Sanity check handler execution environment. */
if (!t) {
fprintf(TH_LOG_STREAM,
"# no active test in SIGALRM handler!?\n");
abort();
}
if (sig != SIGALRM || sig != info->si_signo) {
fprintf(TH_LOG_STREAM,
"# %s: SIGALRM handler caught signal %d!?\n",
t->name, sig != SIGALRM ? sig : info->si_signo);
abort();
}
t->timed_out = true;
// signal process group
kill(-(t->pid), SIGKILL);
}
void __wait_for_test(struct __test_metadata *t)
{
struct sigaction action = {
.sa_sigaction = __timeout_handler,
.sa_flags = SA_SIGINFO,
};
struct sigaction saved_action;
int status;
if (sigaction(SIGALRM, &action, &saved_action)) {
t->passed = 0;
fprintf(TH_LOG_STREAM,
"# %s: unable to install SIGALRM handler\n",
t->name);
return;
}
__active_test = t;
t->timed_out = false;
alarm(t->timeout);
waitpid(t->pid, &status, 0);
alarm(0);
if (sigaction(SIGALRM, &saved_action, NULL)) {
t->passed = 0;
fprintf(TH_LOG_STREAM,
"# %s: unable to uninstall SIGALRM handler\n",
t->name);
return;
}
__active_test = NULL;
if (t->timed_out) {
t->passed = 0;
fprintf(TH_LOG_STREAM,
"# %s: Test terminated by timeout\n", t->name);
} else if (WIFEXITED(status)) {
if (t->termsig != -1) {
t->passed = 0;
fprintf(TH_LOG_STREAM,
"# %s: Test exited normally instead of by signal (code: %d)\n",
t->name,
WEXITSTATUS(status));
} else {
switch (WEXITSTATUS(status)) {
/* Success */
case 0:
t->passed = 1;
break;
/* SKIP */
case 255:
t->passed = 1;
t->skip = 1;
break;
/* Other failure, assume step report. */
default:
t->passed = 0;
fprintf(TH_LOG_STREAM,
"# %s: Test failed at step #%d\n",
t->name,
WEXITSTATUS(status));
}
}
} else if (WIFSIGNALED(status)) {
t->passed = 0;
if (WTERMSIG(status) == SIGABRT) {
fprintf(TH_LOG_STREAM,
"# %s: Test terminated by assertion\n",
t->name);
} else if (WTERMSIG(status) == t->termsig) {
t->passed = 1;
} else {
fprintf(TH_LOG_STREAM,
"# %s: Test terminated unexpectedly by signal %d\n",
t->name,
WTERMSIG(status));
}
} else {
fprintf(TH_LOG_STREAM,
"# %s: Test ended in some other way [%u]\n",
t->name,
status);
}
}
void __run_test(struct __fixture_metadata *f,
struct __fixture_variant_metadata *variant,
struct __test_metadata *t)
{
/* reset test struct */
t->passed = 1;
t->skip = 0;
t->trigger = 0;
t->step = 1;
t->no_print = 0;
memset(t->results->reason, 0, sizeof(t->results->reason));
ksft_print_msg(" RUN %s%s%s.%s ...\n",
f->name, variant->name[0] ? "." : "", variant->name, t->name);
/* Make sure output buffers are flushed before fork */
fflush(stdout);
fflush(stderr);
t->pid = fork();
if (t->pid < 0) {
ksft_print_msg("ERROR SPAWNING TEST CHILD\n");
t->passed = 0;
} else if (t->pid == 0) {
setpgrp();
t->fn(t, variant);
if (t->skip)
_exit(255);
/* Pass is exit 0 */
if (t->passed)
_exit(0);
/* Something else happened, report the step. */
_exit(t->step);
} else {
__wait_for_test(t);
}
ksft_print_msg(" %4s %s%s%s.%s\n", t->passed ? "OK" : "FAIL",
f->name, variant->name[0] ? "." : "", variant->name, t->name);
if (t->skip)
ksft_test_result_skip("%s\n", t->results->reason[0] ?
t->results->reason : "unknown");
else
ksft_test_result(t->passed, "%s%s%s.%s\n",
f->name, variant->name[0] ? "." : "", variant->name, t->name);
}
static int test_harness_run(int __attribute__((unused)) argc,
char __attribute__((unused)) **argv)
{
struct __fixture_variant_metadata no_variant = { .name = "", };
struct __fixture_variant_metadata *v;
struct __fixture_metadata *f;
struct __test_results *results;
struct __test_metadata *t;
int ret = 0;
unsigned int case_count = 0, test_count = 0;
unsigned int count = 0;
unsigned int pass_count = 0;
for (f = __fixture_list; f; f = f->next) {
for (v = f->variant ?: &no_variant; v; v = v->next) {
case_count++;
for (t = f->tests; t; t = t->next)
test_count++;
}
}
results = mmap(NULL, sizeof(*results), PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
ksft_print_header();
ksft_set_plan(test_count);
ksft_print_msg("Starting %u tests from %u test cases.\n",
test_count, case_count);
for (f = __fixture_list; f; f = f->next) {
for (v = f->variant ?: &no_variant; v; v = v->next) {
for (t = f->tests; t; t = t->next) {
count++;
t->results = results;
__run_test(f, v, t);
t->results = NULL;
if (t->passed)
pass_count++;
else
ret = 1;
}
}
}
munmap(results, sizeof(*results));
ksft_print_msg("%s: %u / %u tests passed.\n", ret ? "FAILED" : "PASSED",
pass_count, count);
ksft_exit(ret == 0);
/* unreachable */
return KSFT_FAIL;
}
static void __attribute__((constructor)) __constructor_order_first(void)
{
if (!__constructor_order)
__constructor_order = _CONSTRUCTOR_ORDER_FORWARD;
}
#endif /* __KSELFTEST_HARNESS_H */