ptrace_context_t* load_ptrace_context(pid_t pid) {
ptrace_context_t* context =
(ptrace_context_t*)calloc(1, sizeof(ptrace_context_t));
if (context) {
context->map_info_list = load_map_info_list(pid);
for (map_info_t* mi = context->map_info_list; mi; mi = mi->next) {
load_ptrace_map_info_data(pid, mi);
}
}
return context;
}
map_info_t* acquire_my_map_info_list() {
pthread_mutex_lock(&g_my_map_info_list_mutex);
int64_t time = now();
if (g_my_map_info_list) {
my_map_info_data_t* data = (my_map_info_data_t*)g_my_map_info_list->data;
int64_t age = time - data->timestamp;
if (age >= MAX_CACHE_AGE) {
ALOGV("Invalidated my_map_info_list %p, age=%lld.", g_my_map_info_list, age);
dec_ref(g_my_map_info_list, data);
g_my_map_info_list = NULL;
} else {
ALOGV("Reusing my_map_info_list %p, age=%lld.", g_my_map_info_list, age);
}
}
if (!g_my_map_info_list) {
my_map_info_data_t* data = (my_map_info_data_t*)malloc(sizeof(my_map_info_data_t));
g_my_map_info_list = load_map_info_list(getpid());
if (g_my_map_info_list) {
ALOGV("Loaded my_map_info_list %p.", g_my_map_info_list);
g_my_map_info_list->data = data;
data->refs = 1;
data->timestamp = time;
} else {
free(data);
}
}
map_info_t* milist = g_my_map_info_list;
if (milist) {
my_map_info_data_t* data = (my_map_info_data_t*)g_my_map_info_list->data;
data->refs += 1;
}
pthread_mutex_unlock(&g_my_map_info_list_mutex);
return milist;
}