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Subject[PATCH 6/8] Move kprobes smoke tests to tests/
From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>

Move kprobe smoke tests to tests/

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
---
kernel/test_kprobes.c | 228 --------------------------------------------------
kernel/Makefile | 1
lib/Kconfig.debug | 12 --
tests/Kconfig | 12 ++
tests/Makefile | 1
tests/test_kprobes.c | 228 ++++++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 241 insertions(+), 241 deletions(-)
Index: linux-2.6.25-rc1/kernel/Makefile
===================================================================
--- linux-2.6.25-rc1.orig/kernel/Makefile
+++ linux-2.6.25-rc1/kernel/Makefile
@@ -47,7 +47,6 @@ obj-$(CONFIG_PID_NS) += pid_namespace.o
obj-$(CONFIG_IKCONFIG) += configs.o
obj-$(CONFIG_RESOURCE_COUNTERS) += res_counter.o
obj-$(CONFIG_STOP_MACHINE) += stop_machine.o
-obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
Index: linux-2.6.25-rc1/kernel/test_kprobes.c
===================================================================
--- linux-2.6.25-rc1.orig/kernel/test_kprobes.c
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
- * test_kprobes.c - simple sanity test for *probes
- *
- * Copyright IBM Corp. 2008
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/kprobes.h>
-#include <linux/random.h>
-
-#define div_factor 3
-
-static u32 rand1, preh_val, posth_val, jph_val;
-static int errors, handler_errors, num_tests;
-
-static noinline u32 kprobe_target(u32 value)
-{
- /*
- * gcc ignores noinline on some architectures unless we stuff
- * sufficient lard into the function. The get_kprobe() here is
- * just for that.
- *
- * NOTE: We aren't concerned about the correctness of get_kprobe()
- * here; hence, this call is neither under !preempt nor with the
- * kprobe_mutex held. This is fine(tm)
- */
- if (get_kprobe((void *)0xdeadbeef))
- printk(KERN_INFO "Kprobe smoke test: probe on 0xdeadbeef!\n");
-
- return (value / div_factor);
-}
-
-static int kp_pre_handler(struct kprobe *p, struct pt_regs *regs)
-{
- preh_val = (rand1 / div_factor);
- return 0;
-}
-
-static void kp_post_handler(struct kprobe *p, struct pt_regs *regs,
- unsigned long flags)
-{
- if (preh_val != (rand1 / div_factor)) {
- handler_errors++;
- printk(KERN_ERR "Kprobe smoke test failed: "
- "incorrect value in post_handler\n");
- }
- posth_val = preh_val + div_factor;
-}
-
-static struct kprobe kp = {
- .symbol_name = "kprobe_target",
- .pre_handler = kp_pre_handler,
- .post_handler = kp_post_handler
-};
-
-static int test_kprobe(void)
-{
- int ret;
-
- ret = register_kprobe(&kp);
- if (ret < 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "register_kprobe returned %d\n", ret);
- return ret;
- }
-
- ret = kprobe_target(rand1);
- unregister_kprobe(&kp);
-
- if (preh_val == 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "kprobe pre_handler not called\n");
- handler_errors++;
- }
-
- if (posth_val == 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "kprobe post_handler not called\n");
- handler_errors++;
- }
-
- return 0;
-}
-
-static u32 j_kprobe_target(u32 value)
-{
- if (value != rand1) {
- handler_errors++;
- printk(KERN_ERR "Kprobe smoke test failed: "
- "incorrect value in jprobe handler\n");
- }
-
- jph_val = rand1;
- jprobe_return();
- return 0;
-}
-
-static struct jprobe jp = {
- .entry = j_kprobe_target,
- .kp.symbol_name = "kprobe_target"
-};
-
-static int test_jprobe(void)
-{
- int ret;
-
- ret = register_jprobe(&jp);
- if (ret < 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "register_jprobe returned %d\n", ret);
- return ret;
- }
-
- ret = kprobe_target(rand1);
- unregister_jprobe(&jp);
- if (jph_val == 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "jprobe handler not called\n");
- handler_errors++;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_KRETPROBES
-static u32 krph_val;
-
-static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
-{
- krph_val = (rand1 / div_factor);
- return 0;
-}
-
-static int return_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
-{
- unsigned long ret = regs_return_value(regs);
-
- if (ret != (rand1 / div_factor)) {
- handler_errors++;
- printk(KERN_ERR "Kprobe smoke test failed: "
- "incorrect value in kretprobe handler\n");
- }
- if (krph_val == 0) {
- handler_errors++;
- printk(KERN_ERR "Kprobe smoke test failed: "
- "call to kretprobe entry handler failed\n");
- }
-
- krph_val = rand1;
- return 0;
-}
-
-static struct kretprobe rp = {
- .handler = return_handler,
- .entry_handler = entry_handler,
- .kp.symbol_name = "kprobe_target"
-};
-
-static int test_kretprobe(void)
-{
- int ret;
-
- ret = register_kretprobe(&rp);
- if (ret < 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "register_kretprobe returned %d\n", ret);
- return ret;
- }
-
- ret = kprobe_target(rand1);
- unregister_kretprobe(&rp);
- if (krph_val != rand1) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "kretprobe handler not called\n");
- handler_errors++;
- }
-
- return 0;
-}
-#endif /* CONFIG_KRETPROBES */
-
-int init_test_probes(void)
-{
- int ret;
-
- do {
- rand1 = random32();
- } while (rand1 <= div_factor);
-
- printk(KERN_INFO "Kprobe smoke test started\n");
- num_tests++;
- ret = test_kprobe();
- if (ret < 0)
- errors++;
-
- num_tests++;
- ret = test_jprobe();
- if (ret < 0)
- errors++;
-
-#ifdef CONFIG_KRETPROBES
- num_tests++;
- ret = test_kretprobe();
- if (ret < 0)
- errors++;
-#endif /* CONFIG_KRETPROBES */
-
- if (errors)
- printk(KERN_ERR "BUG: Kprobe smoke test: %d out of "
- "%d tests failed\n", errors, num_tests);
- else if (handler_errors)
- printk(KERN_ERR "BUG: Kprobe smoke test: %d error(s) "
- "running handlers\n", handler_errors);
- else
- printk(KERN_INFO "Kprobe smoke test passed successfully\n");
-
- return 0;
-}
Index: linux-2.6.25-rc1/lib/Kconfig.debug
===================================================================
--- linux-2.6.25-rc1.orig/lib/Kconfig.debug
+++ linux-2.6.25-rc1/lib/Kconfig.debug
@@ -466,18 +466,6 @@ config BOOT_PRINTK_DELAY
BOOT_PRINTK_DELAY also may cause DETECT_SOFTLOCKUP to detect
what it believes to be lockup conditions.

-config KPROBES_SANITY_TEST
- bool "Kprobes sanity tests"
- depends on DEBUG_KERNEL
- depends on KPROBES
- default n
- help
- This option provides for testing basic kprobes functionality on
- boot. A sample kprobe, jprobe and kretprobe are inserted and
- verified for functionality.
-
- Say N if you are unsure.
-
config BACKTRACE_SELF_TEST
tristate "Self test for the backtrace code"
depends on DEBUG_KERNEL
Index: linux-2.6.25-rc1/tests/Kconfig
===================================================================
--- linux-2.6.25-rc1.orig/tests/Kconfig
+++ linux-2.6.25-rc1/tests/Kconfig
@@ -52,4 +52,16 @@ config LKDTM
Documentation on how to use the module can be found in
tests/lkdtm.c

+config KPROBES_SANITY_TEST
+ bool "Kprobes sanity tests"
+ depends on DEBUG_KERNEL
+ depends on KPROBES
+ default n
+ help
+ This option provides for testing basic kprobes functionality on
+ boot. A sample kprobe, jprobe and kretprobe are inserted and
+ verified for functionality.
+
+ Say N if you are unsure.
+
endif # KERNEL_TESTS
Index: linux-2.6.25-rc1/tests/Makefile
===================================================================
--- linux-2.6.25-rc1.orig/tests/Makefile
+++ linux-2.6.25-rc1/tests/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS
obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
obj-$(CONFIG_LKDTM) += lkdtm.o
+obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
Index: linux-2.6.25-rc1/tests/test_kprobes.c
===================================================================
--- /dev/null
+++ linux-2.6.25-rc1/tests/test_kprobes.c
@@ -0,0 +1,228 @@
+/*
+ * test_kprobes.c - simple sanity test for *probes
+ *
+ * Copyright IBM Corp. 2008
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/kprobes.h>
+#include <linux/random.h>
+
+#define div_factor 3
+
+static u32 rand1, preh_val, posth_val, jph_val;
+static int errors, handler_errors, num_tests;
+
+static noinline u32 kprobe_target(u32 value)
+{
+ /*
+ * gcc ignores noinline on some architectures unless we stuff
+ * sufficient lard into the function. The get_kprobe() here is
+ * just for that.
+ *
+ * NOTE: We aren't concerned about the correctness of get_kprobe()
+ * here; hence, this call is neither under !preempt nor with the
+ * kprobe_mutex held. This is fine(tm)
+ */
+ if (get_kprobe((void *)0xdeadbeef))
+ printk(KERN_INFO "Kprobe smoke test: probe on 0xdeadbeef!\n");
+
+ return (value / div_factor);
+}
+
+static int kp_pre_handler(struct kprobe *p, struct pt_regs *regs)
+{
+ preh_val = (rand1 / div_factor);
+ return 0;
+}
+
+static void kp_post_handler(struct kprobe *p, struct pt_regs *regs,
+ unsigned long flags)
+{
+ if (preh_val != (rand1 / div_factor)) {
+ handler_errors++;
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "incorrect value in post_handler\n");
+ }
+ posth_val = preh_val + div_factor;
+}
+
+static struct kprobe kp = {
+ .symbol_name = "kprobe_target",
+ .pre_handler = kp_pre_handler,
+ .post_handler = kp_post_handler
+};
+
+static int test_kprobe(void)
+{
+ int ret;
+
+ ret = register_kprobe(&kp);
+ if (ret < 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "register_kprobe returned %d\n", ret);
+ return ret;
+ }
+
+ ret = kprobe_target(rand1);
+ unregister_kprobe(&kp);
+
+ if (preh_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kprobe pre_handler not called\n");
+ handler_errors++;
+ }
+
+ if (posth_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kprobe post_handler not called\n");
+ handler_errors++;
+ }
+
+ return 0;
+}
+
+static u32 j_kprobe_target(u32 value)
+{
+ if (value != rand1) {
+ handler_errors++;
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "incorrect value in jprobe handler\n");
+ }
+
+ jph_val = rand1;
+ jprobe_return();
+ return 0;
+}
+
+static struct jprobe jp = {
+ .entry = j_kprobe_target,
+ .kp.symbol_name = "kprobe_target"
+};
+
+static int test_jprobe(void)
+{
+ int ret;
+
+ ret = register_jprobe(&jp);
+ if (ret < 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "register_jprobe returned %d\n", ret);
+ return ret;
+ }
+
+ ret = kprobe_target(rand1);
+ unregister_jprobe(&jp);
+ if (jph_val == 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "jprobe handler not called\n");
+ handler_errors++;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_KRETPROBES
+static u32 krph_val;
+
+static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
+{
+ krph_val = (rand1 / div_factor);
+ return 0;
+}
+
+static int return_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
+{
+ unsigned long ret = regs_return_value(regs);
+
+ if (ret != (rand1 / div_factor)) {
+ handler_errors++;
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "incorrect value in kretprobe handler\n");
+ }
+ if (krph_val == 0) {
+ handler_errors++;
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "call to kretprobe entry handler failed\n");
+ }
+
+ krph_val = rand1;
+ return 0;
+}
+
+static struct kretprobe rp = {
+ .handler = return_handler,
+ .entry_handler = entry_handler,
+ .kp.symbol_name = "kprobe_target"
+};
+
+static int test_kretprobe(void)
+{
+ int ret;
+
+ ret = register_kretprobe(&rp);
+ if (ret < 0) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "register_kretprobe returned %d\n", ret);
+ return ret;
+ }
+
+ ret = kprobe_target(rand1);
+ unregister_kretprobe(&rp);
+ if (krph_val != rand1) {
+ printk(KERN_ERR "Kprobe smoke test failed: "
+ "kretprobe handler not called\n");
+ handler_errors++;
+ }
+
+ return 0;
+}
+#endif /* CONFIG_KRETPROBES */
+
+int init_test_probes(void)
+{
+ int ret;
+
+ do {
+ rand1 = random32();
+ } while (rand1 <= div_factor);
+
+ printk(KERN_INFO "Kprobe smoke test started\n");
+ num_tests++;
+ ret = test_kprobe();
+ if (ret < 0)
+ errors++;
+
+ num_tests++;
+ ret = test_jprobe();
+ if (ret < 0)
+ errors++;
+
+#ifdef CONFIG_KRETPROBES
+ num_tests++;
+ ret = test_kretprobe();
+ if (ret < 0)
+ errors++;
+#endif /* CONFIG_KRETPROBES */
+
+ if (errors)
+ printk(KERN_ERR "BUG: Kprobe smoke test: %d out of "
+ "%d tests failed\n", errors, num_tests);
+ else if (handler_errors)
+ printk(KERN_ERR "BUG: Kprobe smoke test: %d error(s) "
+ "running handlers\n", handler_errors);
+ else
+ printk(KERN_INFO "Kprobe smoke test passed successfully\n");
+
+ return 0;
+}

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