system_properties_test.cpp revision b27e200ad6170ba3163f5ae6ba581bdaabb2e696 
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
20#if __BIONIC__
21
22#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
23#include <sys/_system_properties.h>
24
25extern void *__system_property_area__;
26
27struct LocalPropertyTestState {
28    LocalPropertyTestState() {
29        old_pa = __system_property_area__;
30        pa = malloc(PA_SIZE);
31        __system_property_area_init(pa);
32    }
33
34    ~LocalPropertyTestState() {
35        __system_property_area__ = old_pa;
36        free(pa);
37    }
38private:
39    void *pa;
40    void *old_pa;
41};
42
43TEST(properties, add) {
44    LocalPropertyTestState pa;
45
46    char propvalue[PROP_VALUE_MAX];
47
48    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
49    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
50    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
51
52    ASSERT_EQ(6, __system_property_get("property", propvalue));
53    ASSERT_STREQ(propvalue, "value1");
54
55    ASSERT_EQ(6, __system_property_get("other_property", propvalue));
56    ASSERT_STREQ(propvalue, "value2");
57
58    ASSERT_EQ(6, __system_property_get("property_other", propvalue));
59    ASSERT_STREQ(propvalue, "value3");
60}
61
62TEST(properties, update) {
63    LocalPropertyTestState pa;
64
65    char propvalue[PROP_VALUE_MAX];
66    prop_info *pi;
67
68    ASSERT_EQ(0, __system_property_add("property", 8, "oldvalue1", 9));
69    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
70    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
71
72    pi = (prop_info *)__system_property_find("property");
73    ASSERT_NE((prop_info *)NULL, pi);
74    __system_property_update(pi, "value4", 6);
75
76    pi = (prop_info *)__system_property_find("other_property");
77    ASSERT_NE((prop_info *)NULL, pi);
78    __system_property_update(pi, "newvalue5", 9);
79
80    pi = (prop_info *)__system_property_find("property_other");
81    ASSERT_NE((prop_info *)NULL, pi);
82    __system_property_update(pi, "value6", 6);
83
84    ASSERT_EQ(6, __system_property_get("property", propvalue));
85    ASSERT_STREQ(propvalue, "value4");
86
87    ASSERT_EQ(9, __system_property_get("other_property", propvalue));
88    ASSERT_STREQ(propvalue, "newvalue5");
89
90    ASSERT_EQ(6, __system_property_get("property_other", propvalue));
91    ASSERT_STREQ(propvalue, "value6");
92}
93
94// 247 = max # of properties supported by current implementation
95// (this should never go down)
96TEST(properties, fill_247) {
97    LocalPropertyTestState pa;
98    char prop_name[PROP_NAME_MAX];
99    char prop_value[PROP_VALUE_MAX];
100    char prop_value_ret[PROP_VALUE_MAX];
101    int ret;
102
103    for (int i = 0; i < 247; i++) {
104        ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", i);
105        memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
106        ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", i);
107        memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
108        prop_name[PROP_NAME_MAX - 1] = 0;
109        prop_value[PROP_VALUE_MAX - 1] = 0;
110
111        ASSERT_EQ(0, __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1));
112    }
113
114    for (int i = 0; i < 247; i++) {
115        ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", i);
116        memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
117        ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", i);
118        memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
119        prop_name[PROP_NAME_MAX - 1] = 0;
120        prop_value[PROP_VALUE_MAX - 1] = 0;
121        memset(prop_value_ret, '\0', PROP_VALUE_MAX);
122
123        ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
124        ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
125    }
126}
127
128TEST(properties, find_nth) {
129    LocalPropertyTestState pa;
130
131    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
132    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
133    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
134
135    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(0));
136    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(1));
137    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(2));
138
139    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(3));
140    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(4));
141    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(5));
142    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(100));
143    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(200));
144    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(247));
145}
146
147TEST(properties, errors) {
148    LocalPropertyTestState pa;
149    char prop_value[PROP_NAME_MAX];
150
151    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
152    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
153    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
154
155    ASSERT_EQ(0, __system_property_find("property1"));
156    ASSERT_EQ(0, __system_property_get("property1", prop_value));
157
158    ASSERT_EQ(-1, __system_property_add("name", PROP_NAME_MAX, "value", 5));
159    ASSERT_EQ(-1, __system_property_add("name", 4, "value", PROP_VALUE_MAX));
160    ASSERT_EQ(-1, __system_property_update(NULL, "value", PROP_VALUE_MAX));
161}
162
163TEST(properties, serial) {
164    LocalPropertyTestState pa;
165    const prop_info *pi;
166    unsigned int serial;
167
168    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
169    ASSERT_NE((const prop_info *)NULL, pi = __system_property_find("property"));
170    serial = __system_property_serial(pi);
171    ASSERT_EQ(0, __system_property_update((prop_info *)pi, "value2", 6));
172    ASSERT_NE(serial, __system_property_serial(pi));
173}
174
175static void *PropertyWaitHelperFn(void *arg)
176{
177    int *flag = (int *)arg;
178    prop_info *pi;
179    pi = (prop_info *)__system_property_find("property");
180    usleep(100000);
181
182    *flag = 1;
183    __system_property_update(pi, "value3", 6);
184
185    return NULL;
186}
187
188TEST(properties, wait) {
189    LocalPropertyTestState pa;
190    unsigned int serial;
191    prop_info *pi;
192    pthread_t t;
193    int flag = 0;
194
195    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
196    serial = __system_property_wait_any(0);
197    pi = (prop_info *)__system_property_find("property");
198    ASSERT_NE((prop_info *)NULL, pi);
199    __system_property_update(pi, "value2", 6);
200    serial = __system_property_wait_any(serial);
201
202    ASSERT_EQ(0, pthread_create(&t, NULL, PropertyWaitHelperFn, &flag));
203    ASSERT_EQ(flag, 0);
204    serial = __system_property_wait_any(serial);
205    ASSERT_EQ(flag, 1);
206
207    void* result;
208    ASSERT_EQ(0, pthread_join(t, &result));
209}
210
211class KilledByFault {
212    public:
213        explicit KilledByFault() {};
214        bool operator()(int exit_status) const;
215};
216
217bool KilledByFault::operator()(int exit_status) const {
218    return WIFSIGNALED(exit_status) &&
219        (WTERMSIG(exit_status) == SIGSEGV ||
220         WTERMSIG(exit_status) == SIGBUS ||
221         WTERMSIG(exit_status) == SIGABRT);
222}
223
224TEST(properties_DeathTest, read_only) {
225      ::testing::FLAGS_gtest_death_test_style = "threadsafe";
226      ASSERT_EXIT(__system_property_add("property", 8, "value", 5),
227                  KilledByFault(), "");
228}
229#endif
230