From: compudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Date: Sat, 16 Sep 2006 17:54:33 +0000 (+0000)
Subject: update tests
X-Git-Tag: v0.12.20~1372
X-Git-Url: https://git.lttng.org/?a=commitdiff_plain;h=ad32d9aa2904b1d6a04303e39fb755b4cfb620c9;p=lttv.git

update tests

git-svn-id: http://ltt.polymtl.ca/svn@2117 04897980-b3bd-0310-b5e0-8ef037075253
---

diff --git a/tests/kernel/Makefile b/tests/kernel/Makefile
index c3b79bce..bd2ddc49 100644
--- a/tests/kernel/Makefile
+++ b/tests/kernel/Makefile
@@ -8,13 +8,15 @@ ifneq ($(CONFIG_LTT),)
 #	obj-m += test-instrument-size-big.o
 #	obj-m += test-printk-effect.o
 endif
-	obj-m += test-cmpxchg.o
-	obj-m += test-cmpxchg-nolock.o
-	obj-m += test-spinlock.o
-	obj-m += test-inc.o
-	obj-m += test-inc-nolock.o
-	obj-m += test-kmalloc.o
-	obj-m += test-irqdis.o
+#	obj-m += test-cmpxchg.o
+#	obj-m += test-cmpxchg-nolock.o
+#	obj-m += test-spinlock.o
+#	obj-m += test-inc.o
+#	obj-m += test-inc-nolock.o
+#	obj-m += test-kmalloc.o
+#	obj-m += test-irqdis.o
+#	obj-m += test-int3.o
+	obj-m += test-kprobes.o
 else
 	KERNELDIR ?= /lib/modules/$(shell uname -r)/build
 	PWD := $(shell pwd)
diff --git a/tests/kernel/test-kprobes.c b/tests/kernel/test-kprobes.c
new file mode 100644
index 00000000..d1b00ef1
--- /dev/null
+++ b/tests/kernel/test-kprobes.c
@@ -0,0 +1,73 @@
+/* test-kprobes.c
+ *
+ * kprobe timing test.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/kprobes.h>
+#include <linux/kallsyms.h>
+#include <linux/sched.h>
+
+
+/*For each probe you need to allocate a kprobe structure*/
+static struct kprobe kp;
+
+/*kprobe pre_handler: called just before the probed instruction is executed*/
+int handler_pre(struct kprobe *p, struct pt_regs *regs)
+{
+	//printk("pre_handler: p->addr=0x%p, eip=%lx, eflags=0x%lx\n",
+	//	p->addr, regs->eip, regs->eflags);
+	//dump_stack();
+	return 0;
+}
+
+/*kprobe post_handler: called after the probed instruction is executed*/
+void handler_post(struct kprobe *p, struct pt_regs *regs, unsigned long flags)
+{
+	//printk("post_handler: p->addr=0x%p, eflags=0x%lx\n",
+	//	p->addr, regs->eflags);
+}
+
+/* fault_handler: this is called if an exception is generated for any
+ * instruction within the pre- or post-handler, or when Kprobes
+ * single-steps the probed instruction.
+ */
+int handler_fault(struct kprobe *p, struct pt_regs *regs, int trapnr)
+{
+	//printk("fault_handler: p->addr=0x%p, trap #%dn",
+	//	p->addr, trapnr);
+	/* Return 0 because we don't handle the fault. */
+	return 0;
+}
+
+int init_module(void)
+{
+	int ret;
+	kp.pre_handler = handler_pre;
+	kp.post_handler = handler_post;
+	kp.fault_handler = handler_fault;
+	kp.addr = (kprobe_opcode_t*) kallsyms_lookup_name("ltt_relay_reserve_slot");
+	/* register the kprobe now */
+	if (!kp.addr) {
+		printk("Couldn't find %s to plant kprobe\n", "ltt_relay_reserve_slot");
+		return -1;
+	}
+	if ((ret = register_kprobe(&kp) < 0)) {
+		printk("register_kprobe failed, returned %d\n", ret);
+		return -1;
+	}
+	printk("kprobe registered\n");
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	unregister_kprobe(&kp);
+	printk("kprobe unregistered\n");
+}
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mathieu Desnoyers");
+MODULE_DESCRIPTION("Linux Trace Toolkit Test");
+