system_properties_test.cpp revision 5f05348c18286a2cea46eae8acf94ed5b7932fac 
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_area__;
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        old_pa = __system_property_area__;
39        __system_property_area__ = NULL;
40
41        pa_dirname = dirname;
42        pa_filename = pa_dirname + "/__properties__";
43
44        __system_property_set_filename(pa_filename.c_str());
45        __system_property_area_init();
46        valid = true;
47    }
48
49    ~LocalPropertyTestState() {
50        if (!valid)
51            return;
52
53        __system_property_area__ = old_pa;
54
55        __system_property_set_filename(PROP_FILENAME);
56        unlink(pa_filename.c_str());
57        rmdir(pa_dirname.c_str());
58    }
59public:
60    bool valid;
61private:
62    std::string pa_dirname;
63    std::string pa_filename;
64    void *old_pa;
65};
66
67TEST(properties, add) {
68    LocalPropertyTestState pa;
69    ASSERT_TRUE(pa.valid);
70
71    char propvalue[PROP_VALUE_MAX];
72
73    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
74    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
75    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
76
77    ASSERT_EQ(6, __system_property_get("property", propvalue));
78    ASSERT_STREQ(propvalue, "value1");
79
80    ASSERT_EQ(6, __system_property_get("other_property", propvalue));
81    ASSERT_STREQ(propvalue, "value2");
82
83    ASSERT_EQ(6, __system_property_get("property_other", propvalue));
84    ASSERT_STREQ(propvalue, "value3");
85}
86
87TEST(properties, update) {
88    LocalPropertyTestState pa;
89    ASSERT_TRUE(pa.valid);
90
91    char propvalue[PROP_VALUE_MAX];
92    prop_info *pi;
93
94    ASSERT_EQ(0, __system_property_add("property", 8, "oldvalue1", 9));
95    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
96    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
97
98    pi = (prop_info *)__system_property_find("property");
99    ASSERT_NE((prop_info *)NULL, pi);
100    __system_property_update(pi, "value4", 6);
101
102    pi = (prop_info *)__system_property_find("other_property");
103    ASSERT_NE((prop_info *)NULL, pi);
104    __system_property_update(pi, "newvalue5", 9);
105
106    pi = (prop_info *)__system_property_find("property_other");
107    ASSERT_NE((prop_info *)NULL, pi);
108    __system_property_update(pi, "value6", 6);
109
110    ASSERT_EQ(6, __system_property_get("property", propvalue));
111    ASSERT_STREQ(propvalue, "value4");
112
113    ASSERT_EQ(9, __system_property_get("other_property", propvalue));
114    ASSERT_STREQ(propvalue, "newvalue5");
115
116    ASSERT_EQ(6, __system_property_get("property_other", propvalue));
117    ASSERT_STREQ(propvalue, "value6");
118}
119
120TEST(properties, fill) {
121    LocalPropertyTestState pa;
122    ASSERT_TRUE(pa.valid);
123    char prop_name[PROP_NAME_MAX];
124    char prop_value[PROP_VALUE_MAX];
125    char prop_value_ret[PROP_VALUE_MAX];
126    int count = 0;
127    int ret;
128
129    while (true) {
130        ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", count);
131        memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
132        ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", count);
133        memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
134        prop_name[PROP_NAME_MAX - 1] = 0;
135        prop_value[PROP_VALUE_MAX - 1] = 0;
136
137        ret = __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1);
138        if (ret < 0)
139            break;
140
141        count++;
142    }
143
144    // For historical reasons at least 247 properties must be supported
145    ASSERT_GE(count, 247);
146
147    for (int i = 0; i < count; i++) {
148        ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", i);
149        memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
150        ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", i);
151        memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
152        prop_name[PROP_NAME_MAX - 1] = 0;
153        prop_value[PROP_VALUE_MAX - 1] = 0;
154        memset(prop_value_ret, '\0', PROP_VALUE_MAX);
155
156        ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
157        ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
158    }
159}
160
161static void foreach_test_callback(const prop_info *pi, void* cookie) {
162    size_t *count = static_cast<size_t *>(cookie);
163
164    ASSERT_NE((prop_info *)NULL, pi);
165    (*count)++;
166}
167
168TEST(properties, foreach) {
169    LocalPropertyTestState pa;
170    ASSERT_TRUE(pa.valid);
171    size_t count = 0;
172
173    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
174    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
175    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
176
177    ASSERT_EQ(0, __system_property_foreach(foreach_test_callback, &count));
178    ASSERT_EQ(3U, count);
179}
180
181TEST(properties, find_nth) {
182    LocalPropertyTestState pa;
183    ASSERT_TRUE(pa.valid);
184
185    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
186    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
187    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
188
189    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(0));
190    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(1));
191    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(2));
192
193    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(3));
194    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(4));
195    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(5));
196    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(100));
197    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(200));
198    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(247));
199}
200
201static void hierarchical_test_callback(const prop_info *pi, void *cookie) {
202    bool (*ok)[8][8] = static_cast<bool (*)[8][8]>(cookie);
203
204    char name[PROP_NAME_MAX];
205    char value[PROP_VALUE_MAX];
206
207    __system_property_read(pi, name, value);
208
209    int name_i, name_j, name_k;
210    int value_i, value_j, value_k;
211    ASSERT_EQ(3, sscanf(name, "property_%d.%d.%d", &name_i, &name_j, &name_k));
212    ASSERT_EQ(3, sscanf(value, "value_%d.%d.%d", &value_i, &value_j, &value_k));
213    ASSERT_EQ(name_i, value_i);
214    ASSERT_GE(name_i, 0);
215    ASSERT_LT(name_i, 8);
216    ASSERT_EQ(name_j, value_j);
217    ASSERT_GE(name_j, 0);
218    ASSERT_LT(name_j, 8);
219    ASSERT_EQ(name_k, value_k);
220    ASSERT_GE(name_k, 0);
221    ASSERT_LT(name_k, 8);
222
223    ok[name_i][name_j][name_k] = true;
224}
225
226TEST(properties, fill_hierarchical) {
227    LocalPropertyTestState pa;
228    ASSERT_TRUE(pa.valid);
229    char prop_name[PROP_NAME_MAX];
230    char prop_value[PROP_VALUE_MAX];
231    char prop_value_ret[PROP_VALUE_MAX];
232    int ret;
233
234    for (int i = 0; i < 8; i++) {
235        for (int j = 0; j < 8; j++) {
236            for (int k = 0; k < 8; k++) {
237                ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d.%d.%d", i, j, k);
238                memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
239                ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d.%d.%d", i, j, k);
240                memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
241                prop_name[PROP_NAME_MAX - 1] = 0;
242                prop_value[PROP_VALUE_MAX - 1] = 0;
243
244                ASSERT_EQ(0, __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1));
245            }
246        }
247    }
248
249    for (int i = 0; i < 8; i++) {
250        for (int j = 0; j < 8; j++) {
251            for (int k = 0; k < 8; k++) {
252                ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d.%d.%d", i, j, k);
253                memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
254                ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d.%d.%d", i, j, k);
255                memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
256                prop_name[PROP_NAME_MAX - 1] = 0;
257                prop_value[PROP_VALUE_MAX - 1] = 0;
258                memset(prop_value_ret, '\0', PROP_VALUE_MAX);
259
260                ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
261                ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
262            }
263        }
264    }
265
266    bool ok[8][8][8];
267    memset(ok, 0, sizeof(ok));
268    __system_property_foreach(hierarchical_test_callback, ok);
269
270    for (int i = 0; i < 8; i++) {
271        for (int j = 0; j < 8; j++) {
272            for (int k = 0; k < 8; k++) {
273                ASSERT_TRUE(ok[i][j][k]);
274            }
275        }
276    }
277}
278
279TEST(properties, errors) {
280    LocalPropertyTestState pa;
281    ASSERT_TRUE(pa.valid);
282    char prop_value[PROP_NAME_MAX];
283
284    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
285    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
286    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
287
288    ASSERT_EQ(0, __system_property_find("property1"));
289    ASSERT_EQ(0, __system_property_get("property1", prop_value));
290
291    ASSERT_EQ(-1, __system_property_add("name", PROP_NAME_MAX, "value", 5));
292    ASSERT_EQ(-1, __system_property_add("name", 4, "value", PROP_VALUE_MAX));
293    ASSERT_EQ(-1, __system_property_update(NULL, "value", PROP_VALUE_MAX));
294}
295
296TEST(properties, serial) {
297    LocalPropertyTestState pa;
298    ASSERT_TRUE(pa.valid);
299    const prop_info *pi;
300    unsigned int serial;
301
302    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
303    ASSERT_NE((const prop_info *)NULL, pi = __system_property_find("property"));
304    serial = __system_property_serial(pi);
305    ASSERT_EQ(0, __system_property_update((prop_info *)pi, "value2", 6));
306    ASSERT_NE(serial, __system_property_serial(pi));
307}
308
309static void *PropertyWaitHelperFn(void *arg)
310{
311    int *flag = (int *)arg;
312    prop_info *pi;
313    pi = (prop_info *)__system_property_find("property");
314    usleep(100000);
315
316    *flag = 1;
317    __system_property_update(pi, "value3", 6);
318
319    return NULL;
320}
321
322TEST(properties, wait) {
323    LocalPropertyTestState pa;
324    ASSERT_TRUE(pa.valid);
325    unsigned int serial;
326    prop_info *pi;
327    pthread_t t;
328    int flag = 0;
329
330    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
331    serial = __system_property_wait_any(0);
332    pi = (prop_info *)__system_property_find("property");
333    ASSERT_NE((prop_info *)NULL, pi);
334    __system_property_update(pi, "value2", 6);
335    serial = __system_property_wait_any(serial);
336
337    ASSERT_EQ(0, pthread_create(&t, NULL, PropertyWaitHelperFn, &flag));
338    ASSERT_EQ(flag, 0);
339    serial = __system_property_wait_any(serial);
340    ASSERT_EQ(flag, 1);
341
342    void* result;
343    ASSERT_EQ(0, pthread_join(t, &result));
344}
345
346class KilledByFault {
347    public:
348        explicit KilledByFault() {};
349        bool operator()(int exit_status) const;
350};
351
352bool KilledByFault::operator()(int exit_status) const {
353    return WIFSIGNALED(exit_status) &&
354        (WTERMSIG(exit_status) == SIGSEGV ||
355         WTERMSIG(exit_status) == SIGBUS ||
356         WTERMSIG(exit_status) == SIGABRT);
357}
358
359TEST(properties_DeathTest, read_only) {
360      ::testing::FLAGS_gtest_death_test_style = "threadsafe";
361      ASSERT_EXIT(__system_property_add("property", 8, "value", 5),
362                  KilledByFault(), "");
363}
364#endif
365