From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- lib/kunit/try-catch.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 lib/kunit/try-catch.c (limited to 'lib/kunit/try-catch.c') diff --git a/lib/kunit/try-catch.c b/lib/kunit/try-catch.c new file mode 100644 index 000000000..f7825991d --- /dev/null +++ b/lib/kunit/try-catch.c @@ -0,0 +1,98 @@ +// 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 + */ + +#include +#include +#include +#include + +#include "try-catch-impl.h" + +void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch) +{ + try_catch->try_result = -EFAULT; + kthread_complete_and_exit(try_catch->try_completion, -EFAULT); +} +EXPORT_SYMBOL_GPL(kunit_try_catch_throw); + +static int kunit_generic_run_threadfn_adapter(void *data) +{ + struct kunit_try_catch *try_catch = data; + + try_catch->try(try_catch->context); + + kthread_complete_and_exit(try_catch->try_completion, 0); +} + +static unsigned long kunit_test_timeout(void) +{ + /* + * 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.size + * 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 tests timeout due to exceeding sysctl_hung_task_timeout_secs, + * the task will be killed and an oops generated. + */ + return 300 * msecs_to_jiffies(MSEC_PER_SEC); /* 5 min */ +} + +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; + kthread_stop(task_struct); + } + + 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); +} +EXPORT_SYMBOL_GPL(kunit_try_catch_run); -- cgit v1.2.3