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platform_bionic/tests/system_properties_test.cpp
The Android Open Source Project f00c938c7f Merge commit '811b0cdb2d6e4a697dbc63a678712759dd0db242' into HEAD 
Change-Id: I786944f80fb1a2d502fed51dc2c391ed5db66761
2013-11-22 13:38:33 -08:00

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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <sys/wait.h>
#include <errno.h>
#include <unistd.h>
#include <string>
#if __BIONIC__
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
extern void *__system_property_area__;
struct LocalPropertyTestState {
LocalPropertyTestState() : valid(false) {
const char* ANDROID_DATA = getenv("ANDROID_DATA");
char dir_template[PATH_MAX];
snprintf(dir_template, sizeof(dir_template), "%s/local/tmp/prop-XXXXXX", ANDROID_DATA);
char* dirname = mkdtemp(dir_template);
if (!dirname) {
fprintf(stderr, "making temp file for test state failed (is %s writable?): %s",
dir_template, strerror(errno));
return;
}
old_pa = __system_property_area__;
__system_property_area__ = NULL;
pa_dirname = dirname;
pa_filename = pa_dirname + "/__properties__";
__system_property_set_filename(pa_filename.c_str());
__system_property_area_init();
valid = true;
}
~LocalPropertyTestState() {
if (!valid) {
return;
}
__system_property_area__ = old_pa;
__system_property_set_filename(PROP_FILENAME);
unlink(pa_filename.c_str());
rmdir(pa_dirname.c_str());
}
public:
bool valid;
private:
std::string pa_dirname;
std::string pa_filename;
void *old_pa;
};
TEST(properties, add) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
char propvalue[PROP_VALUE_MAX];
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
ASSERT_EQ(6, __system_property_get("property", propvalue));
ASSERT_STREQ(propvalue, "value1");
ASSERT_EQ(6, __system_property_get("other_property", propvalue));
ASSERT_STREQ(propvalue, "value2");
ASSERT_EQ(6, __system_property_get("property_other", propvalue));
ASSERT_STREQ(propvalue, "value3");
}
TEST(properties, update) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
char propvalue[PROP_VALUE_MAX];
prop_info *pi;
ASSERT_EQ(0, __system_property_add("property", 8, "oldvalue1", 9));
ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
pi = (prop_info *)__system_property_find("property");
ASSERT_NE((prop_info *)NULL, pi);
__system_property_update(pi, "value4", 6);
pi = (prop_info *)__system_property_find("other_property");
ASSERT_NE((prop_info *)NULL, pi);
__system_property_update(pi, "newvalue5", 9);
pi = (prop_info *)__system_property_find("property_other");
ASSERT_NE((prop_info *)NULL, pi);
__system_property_update(pi, "value6", 6);
ASSERT_EQ(6, __system_property_get("property", propvalue));
ASSERT_STREQ(propvalue, "value4");
ASSERT_EQ(9, __system_property_get("other_property", propvalue));
ASSERT_STREQ(propvalue, "newvalue5");
ASSERT_EQ(6, __system_property_get("property_other", propvalue));
ASSERT_STREQ(propvalue, "value6");
}
TEST(properties, fill) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
char prop_name[PROP_NAME_MAX];
char prop_value[PROP_VALUE_MAX];
char prop_value_ret[PROP_VALUE_MAX];
int count = 0;
int ret;
while (true) {
ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", count);
memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", count);
memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
prop_name[PROP_NAME_MAX - 1] = 0;
prop_value[PROP_VALUE_MAX - 1] = 0;
ret = __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1);
if (ret < 0)
break;
count++;
}
// For historical reasons at least 247 properties must be supported
ASSERT_GE(count, 247);
for (int i = 0; i < count; i++) {
ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", i);
memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", i);
memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
prop_name[PROP_NAME_MAX - 1] = 0;
prop_value[PROP_VALUE_MAX - 1] = 0;
memset(prop_value_ret, '\0', PROP_VALUE_MAX);
ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
}
}
static void foreach_test_callback(const prop_info *pi, void* cookie) {
size_t *count = static_cast<size_t *>(cookie);
ASSERT_NE((prop_info *)NULL, pi);
(*count)++;
}
TEST(properties, foreach) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
size_t count = 0;
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
ASSERT_EQ(0, __system_property_foreach(foreach_test_callback, &count));
ASSERT_EQ(3U, count);
}
TEST(properties, find_nth) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(0));
ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(1));
ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(2));
ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(3));
ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(4));
ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(5));
ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(100));
ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(200));
ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(247));
}
static void hierarchical_test_callback(const prop_info *pi, void *cookie) {
bool (*ok)[8][8] = static_cast<bool (*)[8][8]>(cookie);
char name[PROP_NAME_MAX];
char value[PROP_VALUE_MAX];
__system_property_read(pi, name, value);
int name_i, name_j, name_k;
int value_i, value_j, value_k;
ASSERT_EQ(3, sscanf(name, "property_%d.%d.%d", &name_i, &name_j, &name_k));
ASSERT_EQ(3, sscanf(value, "value_%d.%d.%d", &value_i, &value_j, &value_k));
ASSERT_EQ(name_i, value_i);
ASSERT_GE(name_i, 0);
ASSERT_LT(name_i, 8);
ASSERT_EQ(name_j, value_j);
ASSERT_GE(name_j, 0);
ASSERT_LT(name_j, 8);
ASSERT_EQ(name_k, value_k);
ASSERT_GE(name_k, 0);
ASSERT_LT(name_k, 8);
ok[name_i][name_j][name_k] = true;
}
TEST(properties, fill_hierarchical) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
char prop_name[PROP_NAME_MAX];
char prop_value[PROP_VALUE_MAX];
char prop_value_ret[PROP_VALUE_MAX];
int ret;
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
for (int k = 0; k < 8; k++) {
ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d.%d.%d", i, j, k);
memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d.%d.%d", i, j, k);
memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
prop_name[PROP_NAME_MAX - 1] = 0;
prop_value[PROP_VALUE_MAX - 1] = 0;
ASSERT_EQ(0, __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1));
}
}
}
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
for (int k = 0; k < 8; k++) {
ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d.%d.%d", i, j, k);
memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d.%d.%d", i, j, k);
memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
prop_name[PROP_NAME_MAX - 1] = 0;
prop_value[PROP_VALUE_MAX - 1] = 0;
memset(prop_value_ret, '\0', PROP_VALUE_MAX);
ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
}
}
}
bool ok[8][8][8];
memset(ok, 0, sizeof(ok));
__system_property_foreach(hierarchical_test_callback, ok);
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
for (int k = 0; k < 8; k++) {
ASSERT_TRUE(ok[i][j][k]);
}
}
}
}
TEST(properties, errors) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
char prop_value[PROP_NAME_MAX];
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
ASSERT_EQ(0, __system_property_find("property1"));
ASSERT_EQ(0, __system_property_get("property1", prop_value));
ASSERT_EQ(-1, __system_property_add("name", PROP_NAME_MAX, "value", 5));
ASSERT_EQ(-1, __system_property_add("name", 4, "value", PROP_VALUE_MAX));
ASSERT_EQ(-1, __system_property_update(NULL, "value", PROP_VALUE_MAX));
}
TEST(properties, serial) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
const prop_info *pi;
unsigned int serial;
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
ASSERT_NE((const prop_info *)NULL, pi = __system_property_find("property"));
serial = __system_property_serial(pi);
ASSERT_EQ(0, __system_property_update((prop_info *)pi, "value2", 6));
ASSERT_NE(serial, __system_property_serial(pi));
}
static void *PropertyWaitHelperFn(void *arg)
{
int *flag = (int *)arg;
prop_info *pi;
pi = (prop_info *)__system_property_find("property");
usleep(100000);
*flag = 1;
__system_property_update(pi, "value3", 6);
return NULL;
}
TEST(properties, wait) {
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
unsigned int serial;
prop_info *pi;
pthread_t t;
int flag = 0;
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
serial = __system_property_wait_any(0);
pi = (prop_info *)__system_property_find("property");
ASSERT_NE((prop_info *)NULL, pi);
__system_property_update(pi, "value2", 6);
serial = __system_property_wait_any(serial);
ASSERT_EQ(0, pthread_create(&t, NULL, PropertyWaitHelperFn, &flag));
ASSERT_EQ(flag, 0);
serial = __system_property_wait_any(serial);
ASSERT_EQ(flag, 1);
void* result;
ASSERT_EQ(0, pthread_join(t, &result));
}
class KilledByFault {
public:
explicit KilledByFault() {};
bool operator()(int exit_status) const;
};
bool KilledByFault::operator()(int exit_status) const {
return WIFSIGNALED(exit_status) &&
(WTERMSIG(exit_status) == SIGSEGV ||
WTERMSIG(exit_status) == SIGBUS ||
WTERMSIG(exit_status) == SIGABRT);
}
TEST(properties_DeathTest, read_only) {
::testing::FLAGS_gtest_death_test_style = "threadsafe";
// This test only makes sense if we're talking to the real system property service.
struct stat sb;
if (stat(PROP_FILENAME, &sb) == -1 && errno == ENOENT) {
return;
}
ASSERT_EXIT(__system_property_add("property", 8, "value", 5), KilledByFault(), "");
}
#endif
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