diff options
| -rw-r--r-- | kernel/test_kprobes.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c index 9c0127ead6a..4f104515a19 100644 --- a/kernel/test_kprobes.c +++ b/kernel/test_kprobes.c @@ -23,6 +23,7 @@ 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) { @@ -81,6 +82,84 @@ 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}; + + kp.addr = 0; /* addr should be cleard for reusing kprobe. */ + 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) { @@ -121,6 +200,43 @@ 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}; + + jp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */ + 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; @@ -176,6 +292,63 @@ 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}; + + rp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */ + 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) @@ -183,6 +356,7 @@ int init_test_probes(void) int ret; target = kprobe_target; + target2 = kprobe_target2; do { rand1 = random32(); @@ -195,15 +369,30 @@ 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) |