mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
a10c7949ad
kunit tool:
- Changes to kunit tool to use qboot on QEMU x86_64, and build GDB scripts.
- Fixes kunit tool bug in parsing test plan.
- Adds test to kunit tool to check parsing late test plan.
kunit:
- Clarifies kunit_skip() argument name.
- Adds Kunit check for the longest symbol length.
- Changes qemu_configs for sparc to use Zilog console.
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Merge tag 'linux_kselftest-kunit-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kunit updates from Shuah Khan:
"kunit tool:
- Changes to kunit tool to use qboot on QEMU x86_64, and build GDB
scripts
- Fixes kunit tool bug in parsing test plan
- Adds test to kunit tool to check parsing late test plan
kunit:
- Clarifies kunit_skip() argument name
- Adds Kunit check for the longest symbol length
- Changes qemu_configs for sparc to use Zilog console"
* tag 'linux_kselftest-kunit-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: tool: add test to check parsing late test plan
kunit: tool: Fix bug in parsing test plan
Kunit to check the longest symbol length
kunit: Clarify kunit_skip() argument name
kunit: tool: Build GDB scripts
kunit: qemu_configs: sparc: use Zilog console
kunit: tool: Use qboot on QEMU x86_64
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Test the longest symbol length. Execute with:
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* ./tools/testing/kunit/kunit.py run longest-symbol
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* --arch=x86_64 --kconfig_add CONFIG_KPROBES=y --kconfig_add CONFIG_MODULES=y
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* --kconfig_add CONFIG_RETPOLINE=n --kconfig_add CONFIG_CFI_CLANG=n
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* --kconfig_add CONFIG_MITIGATION_RETPOLINE=n
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <kunit/test.h>
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#include <linux/stringify.h>
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#include <linux/kprobes.h>
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#include <linux/kallsyms.h>
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#define DI(name) s##name##name
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#define DDI(name) DI(n##name##name)
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#define DDDI(name) DDI(n##name##name)
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#define DDDDI(name) DDDI(n##name##name)
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#define DDDDDI(name) DDDDI(n##name##name)
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/*Generate a symbol whose name length is 511 */
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#define LONGEST_SYM_NAME DDDDDI(g1h2i3j4k5l6m7n)
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#define RETURN_LONGEST_SYM 0xAAAAA
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noinline int LONGEST_SYM_NAME(void);
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noinline int LONGEST_SYM_NAME(void)
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{
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return RETURN_LONGEST_SYM;
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}
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_Static_assert(sizeof(__stringify(LONGEST_SYM_NAME)) == KSYM_NAME_LEN,
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"Incorrect symbol length found. Expected KSYM_NAME_LEN: "
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__stringify(KSYM_NAME_LEN) ", but found: "
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__stringify(sizeof(LONGEST_SYM_NAME)));
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static void test_longest_symbol(struct kunit *test)
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{
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KUNIT_EXPECT_EQ(test, RETURN_LONGEST_SYM, LONGEST_SYM_NAME());
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};
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static void test_longest_symbol_kallsyms(struct kunit *test)
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{
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unsigned long (*kallsyms_lookup_name)(const char *name);
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static int (*longest_sym)(void);
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struct kprobe kp = {
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.symbol_name = "kallsyms_lookup_name",
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};
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if (register_kprobe(&kp) < 0) {
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pr_info("%s: kprobe not registered", __func__);
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KUNIT_FAIL(test, "test_longest_symbol kallsyms: kprobe not registered\n");
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return;
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}
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kunit_warn(test, "test_longest_symbol kallsyms: kprobe registered\n");
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kallsyms_lookup_name = (unsigned long (*)(const char *name))kp.addr;
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unregister_kprobe(&kp);
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longest_sym =
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(void *) kallsyms_lookup_name(__stringify(LONGEST_SYM_NAME));
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KUNIT_EXPECT_EQ(test, RETURN_LONGEST_SYM, longest_sym());
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};
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static struct kunit_case longest_symbol_test_cases[] = {
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KUNIT_CASE(test_longest_symbol),
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KUNIT_CASE(test_longest_symbol_kallsyms),
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{}
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};
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static struct kunit_suite longest_symbol_test_suite = {
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.name = "longest-symbol",
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.test_cases = longest_symbol_test_cases,
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};
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kunit_test_suite(longest_symbol_test_suite);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Test the longest symbol length");
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MODULE_AUTHOR("Sergio González Collado");
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