#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
+#include <sched.h>
+#include <fcntl.h>
+
+#include "marker.h"
+#include "tracer.h"
+#include "localerr.h"
+#include "ustcomm.h"
+
#define UNIX_PATH_MAX 108
-//#define SOCKETDIR "/var/run/ust/socks"
#define SOCKETDIR "/tmp/socks"
#define SOCKETDIRLEN sizeof(SOCKETDIR)
#define USTSIGNAL SIGIO
-#define DBG(fmt, args...) fprintf(stderr, fmt "\n", ## args)
-#define WARN(fmt, args...) fprintf(stderr, "usertrace: WARNING: " fmt "\n", ## args)
-#define ERR(fmt, args...) fprintf(stderr, "usertrace: ERROR: " fmt "\n", ## args)
-#define PERROR(call) perror("usertrace: ERROR: " call)
+#define MAX_MSG_SIZE (100)
+#define MSG_NOTIF 1
+#define MSG_REGISTER_NOTIF 2
+
+char consumer_stack[10000];
+
+static struct ustcomm_app ustcomm_app;
struct tracecmd { /* no padding */
uint32_t size;
uint16_t command;
};
+//struct listener_arg {
+// int pipe_fd;
+//};
+
+struct trctl_msg {
+ /* size: the size of all the fields except size itself */
+ uint32_t size;
+ uint16_t type;
+ /* Only the necessary part of the payload is transferred. It
+ * may even be none of it.
+ */
+ char payload[94];
+};
pid_t mypid;
char mysocketfile[UNIX_PATH_MAX] = "";
+//int pfd = -1;
-void do_command(struct tracecmd *cmd)
+struct consumer_channel {
+ int fd;
+ struct ltt_channel_struct *chan;
+};
+
+int consumer(void *arg)
{
+ int result;
+ int fd;
+ char str[] = "Hello, this is the consumer.\n";
+ struct ltt_trace_struct *trace;
+ struct consumer_channel *consumer_channels;
+ int i;
+ char trace_name[] = "auto";
+
+ ltt_lock_traces();
+ trace = _ltt_trace_find(trace_name);
+ ltt_unlock_traces();
+
+ if(trace == NULL) {
+ CPRINTF("cannot find trace!");
+ return 1;
+ }
+
+ consumer_channels = (struct consumer_channel *) malloc(trace->nr_channels * sizeof(struct consumer_channel));
+ if(consumer_channels == NULL) {
+ ERR("malloc returned NULL");
+ return 1;
+ }
+
+ CPRINTF("opening trace files");
+ for(i=0; i<trace->nr_channels; i++) {
+ char tmp[100];
+ struct ltt_channel_struct *chan = &trace->channels[i];
+
+ consumer_channels[i].chan = chan;
+
+ snprintf(tmp, sizeof(tmp), "trace/%s_0", chan->channel_name);
+ result = consumer_channels[i].fd = open(tmp, O_WRONLY | O_CREAT | O_TRUNC, 00644);
+ if(result == -1) {
+ perror("open");
+ return -1;
+ }
+ CPRINTF("\topened trace file %s", tmp);
+
+ }
+ CPRINTF("done opening trace files");
+
+ for(;;) {
+ /*wait*/
+
+ for(i=0; i<trace->nr_channels; i++) {
+ struct rchan *rchan = consumer_channels[i].chan->trans_channel_data;
+ struct rchan_buf *rbuf = rchan->buf;
+ struct ltt_channel_buf_struct *lttbuf = consumer_channels[i].chan->buf;
+ long consumed_old;
+
+ result = ltt_do_get_subbuf(rbuf, lttbuf, &consumed_old);
+ if(result < 0) {
+ DBG("ltt_do_get_subbuf: error: %s", strerror(-result));
+ }
+ else {
+ DBG("success!");
+
+ result = write(consumer_channels[i].fd, rbuf->buf_data + (consumed_old & (2 * 4096-1)), 4096);
+ ltt_do_put_subbuf(rbuf, lttbuf, consumed_old);
+ }
+ }
+
+ sleep(1);
+ }
+
+// CPRINTF("consumer: got a trace: %s with %d channels\n", trace_name, trace->nr_channels);
+//
+// struct ltt_channel_struct *chan = &trace->channels[0];
+//
+// CPRINTF("channel 1 (%s) active=%u", chan->channel_name, chan->active & 1);
+
+// struct rchan *rchan = chan->trans_channel_data;
+// struct rchan_buf *rbuf = rchan->buf;
+// struct ltt_channel_buf_struct *lttbuf = chan->buf;
+// long consumed_old;
+//
+// result = fd = open("trace.out", O_WRONLY | O_CREAT | O_TRUNC, 00644);
+// if(result == -1) {
+// perror("open");
+// return -1;
+// }
+
+// for(;;) {
+// write(STDOUT_FILENO, str, sizeof(str));
+//
+// result = ltt_do_get_subbuf(rbuf, lttbuf, &consumed_old);
+// if(result < 0) {
+// CPRINTF("ltt_do_get_subbuf: error: %s", strerror(-result));
+// }
+// else {
+// CPRINTF("success!");
+//
+// result = write(fd, rbuf->buf_data + (consumed_old & (2 * 4096-1)), 4096);
+// ltt_do_put_subbuf(rbuf, lttbuf, consumed_old);
+// }
+//
+// //CPRINTF("There seems to be %ld bytes available", SUBBUF_TRUNC(local_read(<tbuf->offset), rbuf->chan) - consumed_old);
+// CPRINTF("Commit count %ld", local_read(<tbuf->commit_count[0]));
+//
+//
+// sleep(1);
+// }
}
-void receive_commands()
+void start_consumer(void)
{
-}
+ int result;
-/* The signal handler itself. */
+ result = clone(consumer, consumer_stack+sizeof(consumer_stack)-1, CLONE_FS | CLONE_FILES | CLONE_VM | CLONE_SIGHAND | CLONE_THREAD, NULL);
+ if(result == -1) {
+ perror("clone");
+ }
+}
-void sighandler(int sig)
+static void print_markers(void)
{
- DBG("sighandler");
- receive_commands();
+ struct marker_iter iter;
+
+ lock_markers();
+ marker_iter_reset(&iter);
+ marker_iter_start(&iter);
+
+ while(iter.marker) {
+ fprintf(stderr, "marker: %s_%s \"%s\"\n", iter.marker->channel, iter.marker->name, iter.marker->format);
+ marker_iter_next(&iter);
+ }
+ unlock_markers();
}
-/* Called by the app signal handler to chain it to us. */
+void do_command(struct tracecmd *cmd)
+{
+}
-void chain_signal()
+void receive_commands()
{
- sighandler(USTSIGNAL);
}
-int init_socket()
+int fd_notif = -1;
+void notif_cb(void)
{
int result;
- int fd;
- char pidstr[6];
- int pidlen;
+ struct trctl_msg msg;
+
+ /* FIXME: fd_notif should probably be protected by a spinlock */
+
+ if(fd_notif == -1)
+ return;
+
+ msg.type = MSG_NOTIF;
+ msg.size = sizeof(msg.type);
- struct sockaddr_un addr;
-
- result = fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
+ /* FIXME: don't block here */
+ result = write(fd_notif, &msg, msg.size+sizeof(msg.size));
if(result == -1) {
- PERROR("socket");
- return -1;
+ PERROR("write");
+ return;
}
+}
+
+#define CONSUMER_DAEMON_SOCK SOCKETDIR "/ustd"
+
+static int inform_consumer_daemon(void)
+{
+}
- addr.sun_family = AF_UNIX;
+int listener_main(void *p)
+{
+ int result;
- result = snprintf(addr.sun_path, UNIX_PATH_MAX, "%s/%d", SOCKETDIR, mypid);
- if(result >= UNIX_PATH_MAX) {
- ERR("string overflow allocating socket name");
- goto close_sock;
+ for(;;) {
+ uint32_t size;
+ struct sockaddr_un addr;
+ socklen_t addrlen = sizeof(addr);
+ char trace_name[] = "auto";
+ char trace_type[] = "ustrelay";
+ char *recvbuf;
+ int len;
+
+ result = ustcomm_app_recv_message(&ustcomm_app, &recvbuf);
+ if(result) {
+ WARN("error in ustcomm_app_recv_message");
+ continue;
+ }
+
+ DBG("received a message! it's: %s\n", recvbuf);
+ len = strlen(recvbuf);
+ if(len && recvbuf[len-1] == '\n') {
+ recvbuf[len-1] = '\0';
+ }
+
+ if(!strcmp(recvbuf, "print_markers")) {
+ print_markers();
+ }
+ else if(!strcmp(recvbuf, "trace_setup")) {
+ DBG("trace setup");
+
+ result = ltt_trace_setup(trace_name);
+ if(result < 0) {
+ ERR("ltt_trace_setup failed");
+ return;
+ }
+
+ result = ltt_trace_set_type(trace_name, trace_type);
+ if(result < 0) {
+ ERR("ltt_trace_set_type failed");
+ return;
+ }
+ }
+ else if(!strcmp(recvbuf, "trace_alloc")) {
+ DBG("trace alloc");
+
+ result = ltt_trace_alloc(trace_name);
+ if(result < 0) {
+ ERR("ltt_trace_alloc failed");
+ return;
+ }
+ }
+ else if(!strcmp(recvbuf, "trace_start")) {
+ DBG("trace start");
+
+ result = ltt_trace_start(trace_name);
+ if(result < 0) {
+ ERR("ltt_trace_start failed");
+ continue;
+ }
+ }
+ else if(!strcmp(recvbuf, "trace_stop")) {
+ DBG("trace stop");
+
+ result = ltt_trace_stop(trace_name);
+ if(result < 0) {
+ ERR("ltt_trace_stop failed");
+ return;
+ }
+ }
+ else if(!strcmp(recvbuf, "trace_destroy")) {
+
+ DBG("trace destroy");
+
+ result = ltt_trace_destroy(trace_name);
+ if(result < 0) {
+ ERR("ltt_trace_destroy failed");
+ return;
+ }
+ }
+
+ free(recvbuf);
}
- //DBG("opening socket at %s", addr.sun_path);
+}
- result = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
+void create_listener(void)
+{
+ int result;
+ static char listener_stack[16384];
+
+ result = clone(listener_main, listener_stack+sizeof(listener_stack)-1, CLONE_FS | CLONE_FILES | CLONE_VM | CLONE_SIGHAND | CLONE_THREAD, NULL);
if(result == -1) {
- PERROR("bind");
- goto close_sock;
+ perror("clone");
}
+}
- strcpy(mysocketfile, addr.sun_path);
+/* The signal handler itself. Signals must be setup so there cannot be
+ nested signals. */
- close_sock:
- close(fd);
+void sighandler(int sig)
+{
+ static char have_listener = 0;
+ DBG("sighandler");
+
+ if(!have_listener) {
+ create_listener();
+ have_listener = 1;
+ }
+}
+
+/* Called by the app signal handler to chain it to us. */
- return -1;
+void chain_signal(void)
+{
+ sighandler(USTSIGNAL);
}
-void destroy_socket()
+static int init_socket(void)
+{
+ return ustcomm_init_app(getpid(), &ustcomm_app);
+}
+
+static void destroy_socket(void)
{
int result;
}
}
-int init_signal_handler(void)
+static int init_signal_handler(void)
{
/* Attempt to handler SIGIO. If the main program wants to
* handle it, fine, it'll override us. They it'll have to
return 0;
}
-void __attribute__((constructor)) init()
+static void auto_probe_connect(struct marker *m)
+{
+ int result;
+
+ result = ltt_marker_connect(m->channel, m->name, "default");
+ if(result)
+ ERR("ltt_marker_connect");
+
+ DBG("just auto connected marker %s %s to probe default", m->channel, m->name);
+}
+
+static void __attribute__((constructor(101))) init0()
+{
+ DBG("UST_AUTOPROBE constructor");
+ if(getenv("UST_AUTOPROBE")) {
+ marker_set_new_marker_cb(auto_probe_connect);
+ }
+}
+
+static void fini(void);
+
+static void __attribute__((constructor(1000))) init()
{
int result;
+ DBG("UST_TRACE constructor");
+
mypid = getpid();
- /* if using instead seperate thread, then should create thread */
- result = init_signal_handler();
+ if(getenv("UST_TRACE")) {
+ char trace_name[] = "auto";
+ char trace_type[] = "ustrelay";
+
+ DBG("starting early tracing");
+
+ /* Ensure marker control is initialized */
+ init_marker_control();
+
+ /* Ensure relay is initialized */
+ init_ustrelay_transport();
+
+ /* Ensure markers are initialized */
+ init_markers();
+
+ /* In case. */
+ ltt_channels_register("ust");
+
+ result = ltt_trace_setup(trace_name);
+ if(result < 0) {
+ ERR("ltt_trace_setup failed");
+ return;
+ }
+
+ result = ltt_trace_set_type(trace_name, trace_type);
+ if(result < 0) {
+ ERR("ltt_trace_set_type failed");
+ return;
+ }
+
+ result = ltt_trace_alloc(trace_name);
+ if(result < 0) {
+ ERR("ltt_trace_alloc failed");
+ return;
+ }
+
+ result = ltt_trace_start(trace_name);
+ if(result < 0) {
+ ERR("ltt_trace_start failed");
+ return;
+ }
+ start_consumer();
+ }
+
+ /* Must create socket before signal handler to prevent races
+ * on pfd variable.
+ */
result = init_socket();
+ if(result == -1) {
+ ERR("init_socket error");
+ return;
+ }
+ result = init_signal_handler();
+ if(result == -1) {
+ ERR("init_signal_handler error");
+ return;
+ }
return;
/* This is only called if we terminate normally, not with an unhandled signal,
* so we cannot rely on it. */
-void __attribute__((destructor)) fini()
+static void __attribute__((destructor)) fini()
{
+ int result;
+
+ /* if trace running, finish it */
+
+ DBG("destructor stopping traces");
+
+ result = ltt_trace_stop("auto");
+ if(result == -1) {
+ ERR("ltt_trace_stop error");
+ }
+
+ result = ltt_trace_destroy("auto");
+ if(result == -1) {
+ ERR("ltt_trace_destroy error");
+ }
+
+ /* FIXME: wait for the consumer to be done */
+ sleep(1);
+
destroy_socket();
}
projects / ust.git / blobdiff