s390/test_unwind: convert to KUnit
Modified stack unwinder self tests to use kunit framework. The functionality stayed the same but the output format is now in tap13 format. Reviewed-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Mete Durlu <meted@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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4a667ba873
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25d36a85c6
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@ -938,6 +938,8 @@ menu "Selftests"
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config S390_UNWIND_SELFTEST
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def_tristate n
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depends on KUNIT
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default KUNIT_ALL_TESTS
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prompt "Test unwind functions"
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help
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This option enables s390 specific stack unwinder testing kernel
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@ -3,7 +3,7 @@
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* Test module for unwind_for_each_frame
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*/
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#define pr_fmt(fmt) "test_unwind: " fmt
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#include <kunit/test.h>
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#include <asm/unwind.h>
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#include <linux/completion.h>
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#include <linux/kallsyms.h>
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@ -16,6 +16,8 @@
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#include <linux/wait.h>
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#include <asm/irq.h>
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struct kunit *current_test;
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#define BT_BUF_SIZE (PAGE_SIZE * 4)
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/*
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@ -29,7 +31,7 @@ static void print_backtrace(char *bt)
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p = strsep(&bt, "\n");
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if (!p)
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break;
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pr_err("%s\n", p);
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kunit_err(current_test, "%s\n", p);
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}
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}
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@ -49,7 +51,7 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs,
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bt = kmalloc(BT_BUF_SIZE, GFP_ATOMIC);
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if (!bt) {
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pr_err("failed to allocate backtrace buffer\n");
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kunit_err(current_test, "failed to allocate backtrace buffer\n");
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return -ENOMEM;
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}
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/* Unwind. */
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@ -63,7 +65,7 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs,
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if (frame_count++ == max_frames)
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break;
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if (state.reliable && !addr) {
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pr_err("unwind state reliable but addr is 0\n");
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kunit_err(current_test, "unwind state reliable but addr is 0\n");
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ret = -EINVAL;
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break;
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}
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@ -75,7 +77,7 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs,
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stack_type_name(state.stack_info.type),
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(void *)state.sp, (void *)state.ip);
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if (bt_pos >= BT_BUF_SIZE)
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pr_err("backtrace buffer is too small\n");
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kunit_err(current_test, "backtrace buffer is too small\n");
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}
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frame_count += 1;
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if (prev_is_func2 && str_has_prefix(sym, "unwindme_func1"))
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@ -85,15 +87,15 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs,
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/* Check the results. */
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if (unwind_error(&state)) {
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pr_err("unwind error\n");
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kunit_err(current_test, "unwind error\n");
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ret = -EINVAL;
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}
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if (!seen_func2_func1) {
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pr_err("unwindme_func2 and unwindme_func1 not found\n");
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kunit_err(current_test, "unwindme_func2 and unwindme_func1 not found\n");
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ret = -EINVAL;
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}
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if (frame_count == max_frames) {
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pr_err("Maximum number of frames exceeded\n");
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kunit_err(current_test, "Maximum number of frames exceeded\n");
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ret = -EINVAL;
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}
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if (ret)
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@ -166,7 +168,7 @@ static noinline int unwindme_func4(struct unwindme *u)
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kp.pre_handler = pgm_pre_handler;
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ret = register_kprobe(&kp);
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if (ret < 0) {
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pr_err("register_kprobe failed %d\n", ret);
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kunit_err(current_test, "register_kprobe failed %d\n", ret);
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return -EINVAL;
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}
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@ -252,7 +254,7 @@ static int test_unwind_irq(struct unwindme *u)
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}
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/* Spawns a task and passes it to test_unwind(). */
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static int test_unwind_task(struct unwindme *u)
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static int test_unwind_task(struct kunit *test, struct unwindme *u)
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{
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struct task_struct *task;
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int ret;
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@ -267,7 +269,7 @@ static int test_unwind_task(struct unwindme *u)
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*/
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task = kthread_run(unwindme_func1, u, "%s", __func__);
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if (IS_ERR(task)) {
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pr_err("kthread_run() failed\n");
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kunit_err(test, "kthread_run() failed\n");
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return PTR_ERR(task);
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}
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/*
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@ -282,77 +284,98 @@ static int test_unwind_task(struct unwindme *u)
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return ret;
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}
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static int test_unwind_flags(int flags)
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struct test_params {
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int flags;
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char *name;
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};
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/*
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* Create required parameter list for tests
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*/
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static const struct test_params param_list[] = {
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{.flags = UWM_DEFAULT, .name = "UWM_DEFAULT"},
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{.flags = UWM_SP, .name = "UWM_SP"},
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{.flags = UWM_REGS, .name = "UWM_REGS"},
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{.flags = UWM_SWITCH_STACK,
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.name = "UWM_SWITCH_STACK"},
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{.flags = UWM_SP | UWM_REGS,
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.name = "UWM_SP | UWM_REGS"},
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{.flags = UWM_CALLER | UWM_SP,
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.name = "WM_CALLER | UWM_SP"},
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{.flags = UWM_CALLER | UWM_SP | UWM_REGS,
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.name = "UWM_CALLER | UWM_SP | UWM_REGS"},
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{.flags = UWM_CALLER | UWM_SP | UWM_REGS | UWM_SWITCH_STACK,
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.name = "UWM_CALLER | UWM_SP | UWM_REGS | UWM_SWITCH_STACK"},
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{.flags = UWM_THREAD, .name = "UWM_THREAD"},
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{.flags = UWM_THREAD | UWM_SP,
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.name = "UWM_THREAD | UWM_SP"},
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{.flags = UWM_THREAD | UWM_CALLER | UWM_SP,
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.name = "UWM_THREAD | UWM_CALLER | UWM_SP"},
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{.flags = UWM_IRQ, .name = "UWM_IRQ"},
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{.flags = UWM_IRQ | UWM_SWITCH_STACK,
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.name = "UWM_IRQ | UWM_SWITCH_STACK"},
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{.flags = UWM_IRQ | UWM_SP,
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.name = "UWM_IRQ | UWM_SP"},
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{.flags = UWM_IRQ | UWM_REGS,
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.name = "UWM_IRQ | UWM_REGS"},
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{.flags = UWM_IRQ | UWM_SP | UWM_REGS,
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.name = "UWM_IRQ | UWM_SP | UWM_REGS"},
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{.flags = UWM_IRQ | UWM_CALLER | UWM_SP,
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.name = "UWM_IRQ | UWM_CALLER | UWM_SP"},
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{.flags = UWM_IRQ | UWM_CALLER | UWM_SP | UWM_REGS,
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.name = "UWM_IRQ | UWM_CALLER | UWM_SP | UWM_REGS"},
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{.flags = UWM_IRQ | UWM_CALLER | UWM_SP | UWM_REGS | UWM_SWITCH_STACK,
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.name = "UWM_IRQ | UWM_CALLER | UWM_SP | UWM_REGS | UWM_SWITCH_STACK"},
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#ifdef CONFIG_KPROBES
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{.flags = UWM_PGM, .name = "UWM_PGM"},
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{.flags = UWM_PGM | UWM_SP,
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.name = "UWM_PGM | UWM_SP"},
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{.flags = UWM_PGM | UWM_REGS,
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.name = "UWM_PGM | UWM_REGS"},
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{.flags = UWM_PGM | UWM_SP | UWM_REGS,
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.name = "UWM_PGM | UWM_SP | UWM_REGS"},
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#endif
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};
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/*
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* Parameter description generator: required for KUNIT_ARRAY_PARAM()
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*/
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static void get_desc(const struct test_params *params, char *desc)
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{
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strscpy(desc, params->name, KUNIT_PARAM_DESC_SIZE);
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}
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/*
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* Create test_unwind_gen_params
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*/
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KUNIT_ARRAY_PARAM(test_unwind, param_list, get_desc);
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static void test_unwind_flags(struct kunit *test)
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{
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struct unwindme u;
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const struct test_params *params;
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u.flags = flags;
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current_test = test;
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params = (const struct test_params *)test->param_value;
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u.flags = params->flags;
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if (u.flags & UWM_THREAD)
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return test_unwind_task(&u);
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KUNIT_EXPECT_EQ(test, 0, test_unwind_task(test, &u));
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else if (u.flags & UWM_IRQ)
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return test_unwind_irq(&u);
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KUNIT_EXPECT_EQ(test, 0, test_unwind_irq(&u));
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else
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return unwindme_func1(&u);
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KUNIT_EXPECT_EQ(test, 0, unwindme_func1(&u));
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}
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static int test_unwind_init(void)
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{
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int failed = 0;
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int total = 0;
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static struct kunit_case unwind_test_cases[] = {
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KUNIT_CASE_PARAM(test_unwind_flags, test_unwind_gen_params),
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{}
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};
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#define TEST(flags) \
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do { \
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pr_info("[ RUN ] " #flags "\n"); \
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total++; \
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if (!test_unwind_flags((flags))) { \
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pr_info("[ OK ] " #flags "\n"); \
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} else { \
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pr_err("[ FAILED ] " #flags "\n"); \
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failed++; \
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} \
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} while (0)
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static struct kunit_suite test_unwind_suite = {
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.name = "test_unwind",
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.test_cases = unwind_test_cases,
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};
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pr_info("running stack unwinder tests");
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TEST(UWM_DEFAULT);
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TEST(UWM_SP);
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TEST(UWM_REGS);
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TEST(UWM_SWITCH_STACK);
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TEST(UWM_SP | UWM_REGS);
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TEST(UWM_CALLER | UWM_SP);
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TEST(UWM_CALLER | UWM_SP | UWM_REGS);
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TEST(UWM_CALLER | UWM_SP | UWM_REGS | UWM_SWITCH_STACK);
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TEST(UWM_THREAD);
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TEST(UWM_THREAD | UWM_SP);
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TEST(UWM_THREAD | UWM_CALLER | UWM_SP);
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TEST(UWM_IRQ);
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TEST(UWM_IRQ | UWM_SWITCH_STACK);
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TEST(UWM_IRQ | UWM_SP);
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TEST(UWM_IRQ | UWM_REGS);
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TEST(UWM_IRQ | UWM_SP | UWM_REGS);
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TEST(UWM_IRQ | UWM_CALLER | UWM_SP);
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TEST(UWM_IRQ | UWM_CALLER | UWM_SP | UWM_REGS);
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TEST(UWM_IRQ | UWM_CALLER | UWM_SP | UWM_REGS | UWM_SWITCH_STACK);
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#ifdef CONFIG_KPROBES
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TEST(UWM_PGM);
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TEST(UWM_PGM | UWM_SP);
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TEST(UWM_PGM | UWM_REGS);
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TEST(UWM_PGM | UWM_SP | UWM_REGS);
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#endif
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#undef TEST
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if (failed) {
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pr_err("%d of %d stack unwinder tests failed", failed, total);
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WARN(1, "%d of %d stack unwinder tests failed", failed, total);
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} else {
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pr_info("all %d stack unwinder tests passed", total);
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}
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kunit_test_suites(&test_unwind_suite);
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return failed ? -EINVAL : 0;
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}
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static void test_unwind_exit(void)
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{
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}
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module_init(test_unwind_init);
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module_exit(test_unwind_exit);
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MODULE_LICENSE("GPL");
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