system_properties_test.cpp revision 0f76e2340ca53ce458a01f91627651dfe0112969 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <gtest/gtest.h>
18#include <sys/wait.h>
19#include <unistd.h>
20#include <string>
21
22#if __BIONIC__
23
24#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
25#include <sys/_system_properties.h>
26
27extern void *__system_property_regions__[PA_REGION_COUNT];
28
29struct LocalPropertyTestState {
30    LocalPropertyTestState() : valid(false) {
31        char dir_template[] = "/data/nativetest/prop-XXXXXX";
32        char *dirname = mkdtemp(dir_template);
33        if (!dirname) {
34            perror("making temp file for test state failed (is /data/nativetest writable?)");
35            return;
36        }
37
38        for (size_t i = 0; i < PA_REGION_COUNT; i++) {
39            old_pa[i] = __system_property_regions__[i];
40            __system_property_regions__[i] = NULL;
41        }
42
43        pa_dirname = dirname;
44        pa_filename = pa_dirname + "/__properties__";
45
46        __system_property_set_filename(pa_filename.c_str());
47        __system_property_area_init();
48        valid = true;
49    }
50
51    ~LocalPropertyTestState() {
52        if (!valid)
53            return;
54
55        for (size_t i = 0; i < PA_REGION_COUNT; i++) {
56            __system_property_regions__[i] = old_pa[i];
57        }
58
59        __system_property_set_filename(PROP_FILENAME);
60        unlink(pa_filename.c_str());
61        rmdir(pa_dirname.c_str());
62    }
63public:
64    bool valid;
65private:
66    std::string pa_dirname;
67    std::string pa_filename;
68    void *old_pa[PA_REGION_COUNT];
69};
70
71TEST(properties, add) {
72    LocalPropertyTestState pa;
73    ASSERT_TRUE(pa.valid);
74
75    char propvalue[PROP_VALUE_MAX];
76
77    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
78    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
79    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
80
81    ASSERT_EQ(6, __system_property_get("property", propvalue));
82    ASSERT_STREQ(propvalue, "value1");
83
84    ASSERT_EQ(6, __system_property_get("other_property", propvalue));
85    ASSERT_STREQ(propvalue, "value2");
86
87    ASSERT_EQ(6, __system_property_get("property_other", propvalue));
88    ASSERT_STREQ(propvalue, "value3");
89}
90
91TEST(properties, update) {
92    LocalPropertyTestState pa;
93    ASSERT_TRUE(pa.valid);
94
95    char propvalue[PROP_VALUE_MAX];
96    prop_info *pi;
97
98    ASSERT_EQ(0, __system_property_add("property", 8, "oldvalue1", 9));
99    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
100    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
101
102    pi = (prop_info *)__system_property_find("property");
103    ASSERT_NE((prop_info *)NULL, pi);
104    __system_property_update(pi, "value4", 6);
105
106    pi = (prop_info *)__system_property_find("other_property");
107    ASSERT_NE((prop_info *)NULL, pi);
108    __system_property_update(pi, "newvalue5", 9);
109
110    pi = (prop_info *)__system_property_find("property_other");
111    ASSERT_NE((prop_info *)NULL, pi);
112    __system_property_update(pi, "value6", 6);
113
114    ASSERT_EQ(6, __system_property_get("property", propvalue));
115    ASSERT_STREQ(propvalue, "value4");
116
117    ASSERT_EQ(9, __system_property_get("other_property", propvalue));
118    ASSERT_STREQ(propvalue, "newvalue5");
119
120    ASSERT_EQ(6, __system_property_get("property_other", propvalue));
121    ASSERT_STREQ(propvalue, "value6");
122}
123
124TEST(properties, fill) {
125    LocalPropertyTestState pa;
126    ASSERT_TRUE(pa.valid);
127    char prop_name[PROP_NAME_MAX];
128    char prop_value[PROP_VALUE_MAX];
129    char prop_value_ret[PROP_VALUE_MAX];
130    int count = 0;
131    int ret;
132
133    while (true) {
134        ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", count);
135        memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
136        ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", count);
137        memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
138        prop_name[PROP_NAME_MAX - 1] = 0;
139        prop_value[PROP_VALUE_MAX - 1] = 0;
140
141        ret = __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1);
142        if (ret < 0)
143            break;
144
145        count++;
146    }
147
148    // For historical reasons at least 247 properties must be supported
149    ASSERT_GE(count, 247);
150
151    for (int i = 0; i < count; i++) {
152        ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", i);
153        memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
154        ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", i);
155        memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
156        prop_name[PROP_NAME_MAX - 1] = 0;
157        prop_value[PROP_VALUE_MAX - 1] = 0;
158        memset(prop_value_ret, '\0', PROP_VALUE_MAX);
159
160        ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
161        ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
162    }
163}
164
165static void foreach_test_callback(const prop_info *pi, void* cookie) {
166    size_t *count = static_cast<size_t *>(cookie);
167
168    ASSERT_NE((prop_info *)NULL, pi);
169    (*count)++;
170}
171
172TEST(properties, foreach) {
173    LocalPropertyTestState pa;
174    ASSERT_TRUE(pa.valid);
175    size_t count = 0;
176
177    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
178    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
179    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
180
181    ASSERT_EQ(0, __system_property_foreach(foreach_test_callback, &count));
182    ASSERT_EQ(3U, count);
183}
184
185TEST(properties, find_nth) {
186    LocalPropertyTestState pa;
187    ASSERT_TRUE(pa.valid);
188
189    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
190    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
191    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
192
193    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(0));
194    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(1));
195    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(2));
196
197    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(3));
198    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(4));
199    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(5));
200    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(100));
201    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(200));
202    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(247));
203}
204
205static void hierarchical_test_callback(const prop_info *pi, void *cookie) {
206    bool (*ok)[8][8] = static_cast<bool (*)[8][8]>(cookie);
207
208    char name[PROP_NAME_MAX];
209    char value[PROP_VALUE_MAX];
210
211    __system_property_read(pi, name, value);
212
213    int name_i, name_j, name_k;
214    int value_i, value_j, value_k;
215    ASSERT_EQ(3, sscanf(name, "property_%d.%d.%d", &name_i, &name_j, &name_k));
216    ASSERT_EQ(3, sscanf(value, "value_%d.%d.%d", &value_i, &value_j, &value_k));
217    ASSERT_EQ(name_i, value_i);
218    ASSERT_GE(name_i, 0);
219    ASSERT_LT(name_i, 8);
220    ASSERT_EQ(name_j, value_j);
221    ASSERT_GE(name_j, 0);
222    ASSERT_LT(name_j, 8);
223    ASSERT_EQ(name_k, value_k);
224    ASSERT_GE(name_k, 0);
225    ASSERT_LT(name_k, 8);
226
227    ok[name_i][name_j][name_k] = true;
228}
229
230TEST(properties, fill_hierarchical) {
231    LocalPropertyTestState pa;
232    ASSERT_TRUE(pa.valid);
233    char prop_name[PROP_NAME_MAX];
234    char prop_value[PROP_VALUE_MAX];
235    char prop_value_ret[PROP_VALUE_MAX];
236    int ret;
237
238    for (int i = 0; i < 8; i++) {
239        for (int j = 0; j < 8; j++) {
240            for (int k = 0; k < 8; k++) {
241                ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d.%d.%d", i, j, k);
242                memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
243                ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d.%d.%d", i, j, k);
244                memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
245                prop_name[PROP_NAME_MAX - 1] = 0;
246                prop_value[PROP_VALUE_MAX - 1] = 0;
247
248                ASSERT_EQ(0, __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1));
249            }
250        }
251    }
252
253    for (int i = 0; i < 8; i++) {
254        for (int j = 0; j < 8; j++) {
255            for (int k = 0; k < 8; k++) {
256                ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d.%d.%d", i, j, k);
257                memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
258                ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d.%d.%d", i, j, k);
259                memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
260                prop_name[PROP_NAME_MAX - 1] = 0;
261                prop_value[PROP_VALUE_MAX - 1] = 0;
262                memset(prop_value_ret, '\0', PROP_VALUE_MAX);
263
264                ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
265                ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
266            }
267        }
268    }
269
270    bool ok[8][8][8];
271    memset(ok, 0, sizeof(ok));
272    __system_property_foreach(hierarchical_test_callback, ok);
273
274    for (int i = 0; i < 8; i++) {
275        for (int j = 0; j < 8; j++) {
276            for (int k = 0; k < 8; k++) {
277                ASSERT_TRUE(ok[i][j][k]);
278            }
279        }
280    }
281}
282
283TEST(properties, errors) {
284    LocalPropertyTestState pa;
285    ASSERT_TRUE(pa.valid);
286    char prop_value[PROP_NAME_MAX];
287
288    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
289    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
290    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
291
292    ASSERT_EQ(0, __system_property_find("property1"));
293    ASSERT_EQ(0, __system_property_get("property1", prop_value));
294
295    ASSERT_EQ(-1, __system_property_add("name", PROP_NAME_MAX, "value", 5));
296    ASSERT_EQ(-1, __system_property_add("name", 4, "value", PROP_VALUE_MAX));
297    ASSERT_EQ(-1, __system_property_update(NULL, "value", PROP_VALUE_MAX));
298}
299
300TEST(properties, serial) {
301    LocalPropertyTestState pa;
302    ASSERT_TRUE(pa.valid);
303    const prop_info *pi;
304    unsigned int serial;
305
306    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
307    ASSERT_NE((const prop_info *)NULL, pi = __system_property_find("property"));
308    serial = __system_property_serial(pi);
309    ASSERT_EQ(0, __system_property_update((prop_info *)pi, "value2", 6));
310    ASSERT_NE(serial, __system_property_serial(pi));
311}
312
313static void *PropertyWaitHelperFn(void *arg)
314{
315    int *flag = (int *)arg;
316    prop_info *pi;
317    pi = (prop_info *)__system_property_find("property");
318    usleep(100000);
319
320    *flag = 1;
321    __system_property_update(pi, "value3", 6);
322
323    return NULL;
324}
325
326TEST(properties, wait) {
327    LocalPropertyTestState pa;
328    ASSERT_TRUE(pa.valid);
329    unsigned int serial;
330    prop_info *pi;
331    pthread_t t;
332    int flag = 0;
333
334    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
335    serial = __system_property_wait_any(0);
336    pi = (prop_info *)__system_property_find("property");
337    ASSERT_NE((prop_info *)NULL, pi);
338    __system_property_update(pi, "value2", 6);
339    serial = __system_property_wait_any(serial);
340
341    ASSERT_EQ(0, pthread_create(&t, NULL, PropertyWaitHelperFn, &flag));
342    ASSERT_EQ(flag, 0);
343    serial = __system_property_wait_any(serial);
344    ASSERT_EQ(flag, 1);
345
346    void* result;
347    ASSERT_EQ(0, pthread_join(t, &result));
348}
349
350class KilledByFault {
351    public:
352        explicit KilledByFault() {};
353        bool operator()(int exit_status) const;
354};
355
356bool KilledByFault::operator()(int exit_status) const {
357    return WIFSIGNALED(exit_status) &&
358        (WTERMSIG(exit_status) == SIGSEGV ||
359         WTERMSIG(exit_status) == SIGBUS ||
360         WTERMSIG(exit_status) == SIGABRT);
361}
362
363TEST(properties_DeathTest, read_only) {
364      ::testing::FLAGS_gtest_death_test_style = "threadsafe";
365      ASSERT_EXIT(__system_property_add("property", 8, "value", 5),
366                  KilledByFault(), "");
367}
368#endif
369