hugetlbfs: fix mmap failure in unaligned size request
[linux-2.6.git] / kernel / test_kprobes.c
index 06b6395..f8b11a2 100644 (file)
 
 static u32 rand1, preh_val, posth_val, jph_val;
 static int errors, handler_errors, num_tests;
+static u32 (*target)(u32 value);
+static u32 (*target2)(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 +64,7 @@ static int test_kprobe(void)
                return ret;
        }
 
-       ret = kprobe_target(rand1);
+       ret = target(rand1);
        unregister_kprobe(&kp);
 
        if (preh_val == 0) {
@@ -92,6 +82,86 @@ static int test_kprobe(void)
        return 0;
 }
 
+static noinline u32 kprobe_target2(u32 value)
+{
+       return (value / div_factor) + 1;
+}
+
+static int kp_pre_handler2(struct kprobe *p, struct pt_regs *regs)
+{
+       preh_val = (rand1 / div_factor) + 1;
+       return 0;
+}
+
+static void kp_post_handler2(struct kprobe *p, struct pt_regs *regs,
+               unsigned long flags)
+{
+       if (preh_val != (rand1 / div_factor) + 1) {
+               handler_errors++;
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "incorrect value in post_handler2\n");
+       }
+       posth_val = preh_val + div_factor;
+}
+
+static struct kprobe kp2 = {
+       .symbol_name = "kprobe_target2",
+       .pre_handler = kp_pre_handler2,
+       .post_handler = kp_post_handler2
+};
+
+static int test_kprobes(void)
+{
+       int ret;
+       struct kprobe *kps[2] = {&kp, &kp2};
+
+       /* addr and flags should be cleard for reusing kprobe. */
+       kp.addr = NULL;
+       kp.flags = 0;
+       ret = register_kprobes(kps, 2);
+       if (ret < 0) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "register_kprobes returned %d\n", ret);
+               return ret;
+       }
+
+       preh_val = 0;
+       posth_val = 0;
+       ret = target(rand1);
+
+       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++;
+       }
+
+       preh_val = 0;
+       posth_val = 0;
+       ret = target2(rand1);
+
+       if (preh_val == 0) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "kprobe pre_handler2 not called\n");
+               handler_errors++;
+       }
+
+       if (posth_val == 0) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "kprobe post_handler2 not called\n");
+               handler_errors++;
+       }
+
+       unregister_kprobes(kps, 2);
+       return 0;
+
+}
+
 static u32 j_kprobe_target(u32 value)
 {
        if (value != rand1) {
@@ -121,7 +191,7 @@ 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: "
@@ -132,6 +202,45 @@ static int test_jprobe(void)
        return 0;
 }
 
+static struct jprobe jp2 = {
+       .entry          = j_kprobe_target,
+       .kp.symbol_name = "kprobe_target2"
+};
+
+static int test_jprobes(void)
+{
+       int ret;
+       struct jprobe *jps[2] = {&jp, &jp2};
+
+       /* addr and flags should be cleard for reusing kprobe. */
+       jp.kp.addr = NULL;
+       jp.kp.flags = 0;
+       ret = register_jprobes(jps, 2);
+       if (ret < 0) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "register_jprobes returned %d\n", ret);
+               return ret;
+       }
+
+       jph_val = 0;
+       ret = target(rand1);
+       if (jph_val == 0) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "jprobe handler not called\n");
+               handler_errors++;
+       }
+
+       jph_val = 0;
+       ret = target2(rand1);
+       if (jph_val == 0) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "jprobe handler2 not called\n");
+               handler_errors++;
+       }
+       unregister_jprobes(jps, 2);
+
+       return 0;
+}
 #ifdef CONFIG_KRETPROBES
 static u32 krph_val;
 
@@ -177,7 +286,7 @@ 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: "
@@ -187,12 +296,74 @@ static int test_kretprobe(void)
 
        return 0;
 }
+
+static int return_handler2(struct kretprobe_instance *ri, struct pt_regs *regs)
+{
+       unsigned long ret = regs_return_value(regs);
+
+       if (ret != (rand1 / div_factor) + 1) {
+               handler_errors++;
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "incorrect value in kretprobe handler2\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 rp2 = {
+       .handler        = return_handler2,
+       .entry_handler  = entry_handler,
+       .kp.symbol_name = "kprobe_target2"
+};
+
+static int test_kretprobes(void)
+{
+       int ret;
+       struct kretprobe *rps[2] = {&rp, &rp2};
+
+       /* addr and flags should be cleard for reusing kprobe. */
+       rp.kp.addr = NULL;
+       rp.kp.flags = 0;
+       ret = register_kretprobes(rps, 2);
+       if (ret < 0) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "register_kretprobe returned %d\n", ret);
+               return ret;
+       }
+
+       krph_val = 0;
+       ret = target(rand1);
+       if (krph_val != rand1) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "kretprobe handler not called\n");
+               handler_errors++;
+       }
+
+       krph_val = 0;
+       ret = target2(rand1);
+       if (krph_val != rand1) {
+               printk(KERN_ERR "Kprobe smoke test failed: "
+                               "kretprobe handler2 not called\n");
+               handler_errors++;
+       }
+       unregister_kretprobes(rps, 2);
+       return 0;
+}
 #endif /* CONFIG_KRETPROBES */
 
 int init_test_probes(void)
 {
        int ret;
 
+       target = kprobe_target;
+       target2 = kprobe_target2;
+
        do {
                rand1 = random32();
        } while (rand1 <= div_factor);
@@ -204,15 +375,30 @@ int init_test_probes(void)
                errors++;
 
        num_tests++;
+       ret = test_kprobes();
+       if (ret < 0)
+               errors++;
+
+       num_tests++;
        ret = test_jprobe();
        if (ret < 0)
                errors++;
 
+       num_tests++;
+       ret = test_jprobes();
+       if (ret < 0)
+               errors++;
+
 #ifdef CONFIG_KRETPROBES
        num_tests++;
        ret = test_kretprobe();
        if (ret < 0)
                errors++;
+
+       num_tests++;
+       ret = test_kretprobes();
+       if (ret < 0)
+               errors++;
 #endif /* CONFIG_KRETPROBES */
 
        if (errors)