I was testing out libspotify library (version 12.1.51 x86 for linux) and the application keeps crashing when I call sp_session_create() with a segmentation fault.
I don't have application key, nor a Premium Spotify account (yet), but that shouldn't be the reason for the crash, since if I remember correctly, there is an error code for invalid application key.
My code is as follows:
static uint_8_t g_appkey[] = {1, 2, 3};
static const char *username = "MyUsername";
static const char *password = "MyPassword";
static int logged_in;
static sp_session_callbacks session_callbacks;
static sp_session_config spconfig;
static void on_login(sp_session *session, sp_error error) {
printf("Callback: on_login");
if (error != SP_ERROR_OK) {
printf("Error: Unable to login: %d\n", (int) error);
exit(-1);
}
logged_in = 1;
}
static void on_main_thread_notified(sp_session *session) {
printf("callback: on_main_thread_notified");
}
static void on_log_message(sp_session *session, const char *data) {
printf("callback: on_log_message");
}
int main(int argc, char **argv) {
sp_error error;
sp_session *session;
int next_timeout;
/* struct fill */
memset(&session_callbacks, 0, sizeof(session_callbacks));
memset(&spconfig, 0, sizeof(spconfig));
session_callbacks.logged_in = &on_login;
session_callbacks.notify_main_thread = &on_main_thread_notified;
session_callbacks.log_message = &on_log_message;
spconfig.api_version = SPOTIFY_API_VERSION;
spconfig.cache_location = "tmp";
spconfig.settings_location = "tmp";
spconfig.application_key = g_appkey;
spconfig.application_key_size = sizeof(g_appkey);
spconfig.user_agent = "spot";
spconfig.callbacks = &session_callbacks;
/* session creation */
error = sp_session_create(&spconfig, &session);
if (error != SP_ERROR_OK) {
printf("ERROR: Unable to create spotify session: %s\n", sp_error_message(error));
exit(-1);
}
/* log in */
logged_in = 0;
sp_session_login(session, username, password, 0, NULL);
while(!logged_in) {
sp_session_process_events(session, &next_timeout);
sleep(next_timeout);
}
printf("Sucess!!");
exit(0);
}
Any tips for where could be the problem?
Appreciated for any help given.
backtrace from gdb:
[Thread debugging using libthread_db enabled]
[New Thread 0xb7fe6b70 (LWP 1839)]
[New Thread 0xb7f65b70 (LWP 1840)]
Program received signal SIGSEGV, Segmentation fault.
0x002b9b36 in sp_session_create () from /usr/local/lib/libspotify.so.12
(gdb) thread apply all backtrace
Thread 3 (Thread 0xb7f65b70 (LWP 1840)):
#0 0x0012d422 in __kernel_vsyscall ()
#1 0x003e6ce6 in nanosleep () at ../sysdeps/unix/syscall-template.S:82
#2 0x0041644c in usleep (useconds=10000) at ../sysdeps/unix/sysv/linux/usleep.c:33
#3 0x00293581 in ?? () from /usr/local/lib/libspotify.so.12
#4 0x00293990 in ?? () from /usr/local/lib/libspotify.so.12
#5 0x001d42b7 in ?? () from /usr/local/lib/libspotify.so.12
#6 0x004ae96e in start_thread (arg=0xb7f65b70) at pthread_create.c:300
#7 0x0041ca4e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Thread 2 (Thread 0xb7fe6b70 (LWP 1839)):
#0 0x0012d422 in __kernel_vsyscall ()
#1 0x004b5245 in sem_wait@@GLIBC_2.1 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/sem_wait.S:80
#2 0x002178fa in ?? () from /usr/local/lib/libspotify.so.12
#3 0x001d42b7 in ?? () from /usr/local/lib/libspotify.so.12
#4 0x004ae96e in start_thread (arg=0xb7fe6b70) at pthread_create.c:300
#5 0x0041ca4e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Thread 1 (Thread 0xb7fe78d0 (LWP 1836)):
#0 0x002b9b36 in sp_session_create () from /usr/local/lib/libspotify.so.12
#1 0x080487d5 in main ()
(gdb)
Problem solved.
I got a valid application key from spotify, tested out my code and now it works.
It seems that the current live libspotify version has a bug when entering invalid application keys.