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authorMasami Hiramatsu <mhiramat@redhat.com>2009-01-06 17:41:48 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 18:59:20 -0500
commit12da3b888b2035bb0f106122f1cc1b6d357fad53 (patch)
tree2cc785f3b06eaed3d007c1a075540197b93b6cab /kernel
parent8e1144050e49dd4ef19c117dc5626f212cfe73cf (diff)
kprobes: add tests for register_kprobes
Add testcases for *probe batch registration (register_kprobes) to kprobes sanity tests. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: David Miller <davem@davemloft.net> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/test_kprobes.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c
index 9c0127ead6ab..4f104515a19b 100644
--- a/kernel/test_kprobes.c
+++ b/kernel/test_kprobes.c
@@ -23,6 +23,7 @@
23static u32 rand1, preh_val, posth_val, jph_val; 23static u32 rand1, preh_val, posth_val, jph_val;
24static int errors, handler_errors, num_tests; 24static int errors, handler_errors, num_tests;
25static u32 (*target)(u32 value); 25static u32 (*target)(u32 value);
26static u32 (*target2)(u32 value);
26 27
27static noinline u32 kprobe_target(u32 value) 28static noinline u32 kprobe_target(u32 value)
28{ 29{
@@ -81,6 +82,84 @@ static int test_kprobe(void)
81 return 0; 82 return 0;
82} 83}
83 84
85static noinline u32 kprobe_target2(u32 value)
86{
87 return (value / div_factor) + 1;
88}
89
90static int kp_pre_handler2(struct kprobe *p, struct pt_regs *regs)
91{
92 preh_val = (rand1 / div_factor) + 1;
93 return 0;
94}
95
96static void kp_post_handler2(struct kprobe *p, struct pt_regs *regs,
97 unsigned long flags)
98{
99 if (preh_val != (rand1 / div_factor) + 1) {
100 handler_errors++;
101 printk(KERN_ERR "Kprobe smoke test failed: "
102 "incorrect value in post_handler2\n");
103 }
104 posth_val = preh_val + div_factor;
105}
106
107static struct kprobe kp2 = {
108 .symbol_name = "kprobe_target2",
109 .pre_handler = kp_pre_handler2,
110 .post_handler = kp_post_handler2
111};
112
113static int test_kprobes(void)
114{
115 int ret;
116 struct kprobe *kps[2] = {&kp, &kp2};
117
118 kp.addr = 0; /* addr should be cleard for reusing kprobe. */
119 ret = register_kprobes(kps, 2);
120 if (ret < 0) {
121 printk(KERN_ERR "Kprobe smoke test failed: "
122 "register_kprobes returned %d\n", ret);
123 return ret;
124 }
125
126 preh_val = 0;
127 posth_val = 0;
128 ret = target(rand1);
129
130 if (preh_val == 0) {
131 printk(KERN_ERR "Kprobe smoke test failed: "
132 "kprobe pre_handler not called\n");
133 handler_errors++;
134 }
135
136 if (posth_val == 0) {
137 printk(KERN_ERR "Kprobe smoke test failed: "
138 "kprobe post_handler not called\n");
139 handler_errors++;
140 }
141
142 preh_val = 0;
143 posth_val = 0;
144 ret = target2(rand1);
145
146 if (preh_val == 0) {
147 printk(KERN_ERR "Kprobe smoke test failed: "
148 "kprobe pre_handler2 not called\n");
149 handler_errors++;
150 }
151
152 if (posth_val == 0) {
153 printk(KERN_ERR "Kprobe smoke test failed: "
154 "kprobe post_handler2 not called\n");
155 handler_errors++;
156 }
157
158 unregister_kprobes(kps, 2);
159 return 0;
160
161}
162
84static u32 j_kprobe_target(u32 value) 163static u32 j_kprobe_target(u32 value)
85{ 164{
86 if (value != rand1) { 165 if (value != rand1) {
@@ -121,6 +200,43 @@ static int test_jprobe(void)
121 return 0; 200 return 0;
122} 201}
123 202
203static struct jprobe jp2 = {
204 .entry = j_kprobe_target,
205 .kp.symbol_name = "kprobe_target2"
206};
207
208static int test_jprobes(void)
209{
210 int ret;
211 struct jprobe *jps[2] = {&jp, &jp2};
212
213 jp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */
214 ret = register_jprobes(jps, 2);
215 if (ret < 0) {
216 printk(KERN_ERR "Kprobe smoke test failed: "
217 "register_jprobes returned %d\n", ret);
218 return ret;
219 }
220
221 jph_val = 0;
222 ret = target(rand1);
223 if (jph_val == 0) {
224 printk(KERN_ERR "Kprobe smoke test failed: "
225 "jprobe handler not called\n");
226 handler_errors++;
227 }
228
229 jph_val = 0;
230 ret = target2(rand1);
231 if (jph_val == 0) {
232 printk(KERN_ERR "Kprobe smoke test failed: "
233 "jprobe handler2 not called\n");
234 handler_errors++;
235 }
236 unregister_jprobes(jps, 2);
237
238 return 0;
239}
124#ifdef CONFIG_KRETPROBES 240#ifdef CONFIG_KRETPROBES
125static u32 krph_val; 241static u32 krph_val;
126 242
@@ -176,6 +292,63 @@ static int test_kretprobe(void)
176 292
177 return 0; 293 return 0;
178} 294}
295
296static int return_handler2(struct kretprobe_instance *ri, struct pt_regs *regs)
297{
298 unsigned long ret = regs_return_value(regs);
299
300 if (ret != (rand1 / div_factor) + 1) {
301 handler_errors++;
302 printk(KERN_ERR "Kprobe smoke test failed: "
303 "incorrect value in kretprobe handler2\n");
304 }
305 if (krph_val == 0) {
306 handler_errors++;
307 printk(KERN_ERR "Kprobe smoke test failed: "
308 "call to kretprobe entry handler failed\n");
309 }
310
311 krph_val = rand1;
312 return 0;
313}
314
315static struct kretprobe rp2 = {
316 .handler = return_handler2,
317 .entry_handler = entry_handler,
318 .kp.symbol_name = "kprobe_target2"
319};
320
321static int test_kretprobes(void)
322{
323 int ret;
324 struct kretprobe *rps[2] = {&rp, &rp2};
325
326 rp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */
327 ret = register_kretprobes(rps, 2);
328 if (ret < 0) {
329 printk(KERN_ERR "Kprobe smoke test failed: "
330 "register_kretprobe returned %d\n", ret);
331 return ret;
332 }
333
334 krph_val = 0;
335 ret = target(rand1);
336 if (krph_val != rand1) {
337 printk(KERN_ERR "Kprobe smoke test failed: "
338 "kretprobe handler not called\n");
339 handler_errors++;
340 }
341
342 krph_val = 0;
343 ret = target2(rand1);
344 if (krph_val != rand1) {
345 printk(KERN_ERR "Kprobe smoke test failed: "
346 "kretprobe handler2 not called\n");
347 handler_errors++;
348 }
349 unregister_kretprobes(rps, 2);
350 return 0;
351}
179#endif /* CONFIG_KRETPROBES */ 352#endif /* CONFIG_KRETPROBES */
180 353
181int init_test_probes(void) 354int init_test_probes(void)
@@ -183,6 +356,7 @@ int init_test_probes(void)
183 int ret; 356 int ret;
184 357
185 target = kprobe_target; 358 target = kprobe_target;
359 target2 = kprobe_target2;
186 360
187 do { 361 do {
188 rand1 = random32(); 362 rand1 = random32();
@@ -195,15 +369,30 @@ int init_test_probes(void)
195 errors++; 369 errors++;
196 370
197 num_tests++; 371 num_tests++;
372 ret = test_kprobes();
373 if (ret < 0)
374 errors++;
375
376 num_tests++;
198 ret = test_jprobe(); 377 ret = test_jprobe();
199 if (ret < 0) 378 if (ret < 0)
200 errors++; 379 errors++;
201 380
381 num_tests++;
382 ret = test_jprobes();
383 if (ret < 0)
384 errors++;
385
202#ifdef CONFIG_KRETPROBES 386#ifdef CONFIG_KRETPROBES
203 num_tests++; 387 num_tests++;
204 ret = test_kretprobe(); 388 ret = test_kretprobe();
205 if (ret < 0) 389 if (ret < 0)
206 errors++; 390 errors++;
391
392 num_tests++;
393 ret = test_kretprobes();
394 if (ret < 0)
395 errors++;
207#endif /* CONFIG_KRETPROBES */ 396#endif /* CONFIG_KRETPROBES */
208 397
209 if (errors) 398 if (errors)