system_properties_test.cpp revision 890aa0d937ae72473c84cc773e77d45e9288b0bc 
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
205TEST(properties, errors) {
206    LocalPropertyTestState pa;
207    ASSERT_TRUE(pa.valid);
208    char prop_value[PROP_NAME_MAX];
209
210    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
211    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
212    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
213
214    ASSERT_EQ(0, __system_property_find("property1"));
215    ASSERT_EQ(0, __system_property_get("property1", prop_value));
216
217    ASSERT_EQ(-1, __system_property_add("name", PROP_NAME_MAX, "value", 5));
218    ASSERT_EQ(-1, __system_property_add("name", 4, "value", PROP_VALUE_MAX));
219    ASSERT_EQ(-1, __system_property_update(NULL, "value", PROP_VALUE_MAX));
220}
221
222TEST(properties, serial) {
223    LocalPropertyTestState pa;
224    ASSERT_TRUE(pa.valid);
225    const prop_info *pi;
226    unsigned int serial;
227
228    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
229    ASSERT_NE((const prop_info *)NULL, pi = __system_property_find("property"));
230    serial = __system_property_serial(pi);
231    ASSERT_EQ(0, __system_property_update((prop_info *)pi, "value2", 6));
232    ASSERT_NE(serial, __system_property_serial(pi));
233}
234
235static void *PropertyWaitHelperFn(void *arg)
236{
237    int *flag = (int *)arg;
238    prop_info *pi;
239    pi = (prop_info *)__system_property_find("property");
240    usleep(100000);
241
242    *flag = 1;
243    __system_property_update(pi, "value3", 6);
244
245    return NULL;
246}
247
248TEST(properties, wait) {
249    LocalPropertyTestState pa;
250    ASSERT_TRUE(pa.valid);
251    unsigned int serial;
252    prop_info *pi;
253    pthread_t t;
254    int flag = 0;
255
256    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
257    serial = __system_property_wait_any(0);
258    pi = (prop_info *)__system_property_find("property");
259    ASSERT_NE((prop_info *)NULL, pi);
260    __system_property_update(pi, "value2", 6);
261    serial = __system_property_wait_any(serial);
262
263    ASSERT_EQ(0, pthread_create(&t, NULL, PropertyWaitHelperFn, &flag));
264    ASSERT_EQ(flag, 0);
265    serial = __system_property_wait_any(serial);
266    ASSERT_EQ(flag, 1);
267
268    void* result;
269    ASSERT_EQ(0, pthread_join(t, &result));
270}
271
272class KilledByFault {
273    public:
274        explicit KilledByFault() {};
275        bool operator()(int exit_status) const;
276};
277
278bool KilledByFault::operator()(int exit_status) const {
279    return WIFSIGNALED(exit_status) &&
280        (WTERMSIG(exit_status) == SIGSEGV ||
281         WTERMSIG(exit_status) == SIGBUS ||
282         WTERMSIG(exit_status) == SIGABRT);
283}
284
285TEST(properties_DeathTest, read_only) {
286      ::testing::FLAGS_gtest_death_test_style = "threadsafe";
287      ASSERT_EXIT(__system_property_add("property", 8, "value", 5),
288                  KilledByFault(), "");
289}
290#endif
291