kprobes: indirectly call kprobe_target (8e114405) · Commits · 戴 / test

kernel/test_kprobes.c

+6 −15

Original line number	Diff line number	Diff line
		@@ -22,21 +22,10 @@

		static u32 rand1, preh_val, posth_val, jph_val;
		static int errors, handler_errors, num_tests;
		static u32 (*target)(u32 value);

		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);
		}

		@@ -74,7 +63,7 @@ static int test_kprobe(void)
		return ret;
		}

		ret = kprobe_target(rand1);
		ret = target(rand1);
		unregister_kprobe(&kp);

		if (preh_val == 0) {
		@@ -121,7 +110,7 @@ static int test_jprobe(void)
		return ret;
		}

		ret = kprobe_target(rand1);
		ret = target(rand1);
		unregister_jprobe(&jp);
		if (jph_val == 0) {
		printk(KERN_ERR "Kprobe smoke test failed: "
		@@ -177,7 +166,7 @@ static int test_kretprobe(void)
		return ret;
		}

		ret = kprobe_target(rand1);
		ret = target(rand1);
		unregister_kretprobe(&rp);
		if (krph_val != rand1) {
		printk(KERN_ERR "Kprobe smoke test failed: "
		@@ -193,6 +182,8 @@ int init_test_probes(void)
		{
		int ret;

		target = kprobe_target;

		do {
		rand1 = random32();
		} while (rand1 <= div_factor);