+/*
+ * Copyright (C) 2009 Pierre-Marc Fournier
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/shm.h>
#include <fcntl.h>
#include <unistd.h>
+#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
struct buffer_info {
char *name;
pid_t pid;
+ struct ustcomm_connection conn;
int shmid;
void *mem;
long consumed_old;
};
-int add_buffer(pid_t pid, char *bufname)
-{
- struct buffer_info *buf;
- char *send_msg;
- char *received_msg;
- int result;
- char *tmp;
- int fd;
-
- buf = (struct buffer_info *) malloc(sizeof(struct buffer_info));
- if(buf == NULL) {
- ERR("add_buffer: insufficient memory");
- return -1;
- }
-
- buf->name = bufname;
- buf->pid = pid;
-
- /* get shmid */
- asprintf(&send_msg, "get_shmid %s", buf->name);
- send_message(pid, send_msg, &received_msg);
- free(send_msg);
- DBG("got buffer name %s", buf->name);
-
- result = sscanf(received_msg, "%d", &buf->shmid);
- if(result != 1) {
- ERR("unable to parse response to get_shmid");
- return -1;
- }
- free(received_msg);
- DBG("got shmid %d", buf->shmid);
-
- /* get n_subbufs */
- asprintf(&send_msg, "get_n_subbufs %s", buf->name);
- send_message(pid, send_msg, &received_msg);
- free(send_msg);
-
- result = sscanf(received_msg, "%d", &buf->n_subbufs);
- if(result != 1) {
- ERR("unable to parse response to get_n_subbufs");
- return -1;
- }
- free(received_msg);
- DBG("got n_subbufs %d", buf->n_subbufs);
-
- /* get subbuf size */
- asprintf(&send_msg, "get_subbuf_size %s", buf->name);
- send_message(pid, send_msg, &received_msg);
- free(send_msg);
-
- result = sscanf(received_msg, "%d", &buf->subbuf_size);
- if(result != 1) {
- ERR("unable to parse response to get_subbuf_size");
- return -1;
- }
- free(received_msg);
- DBG("got subbuf_size %d", buf->subbuf_size);
-
- /* attach memory */
- buf->mem = shmat(buf->shmid, NULL, 0);
- if(buf->mem == (void *) 0) {
- perror("shmat");
- return -1;
- }
- DBG("successfully attached memory");
-
- /* open file for output */
- asprintf(&tmp, "/tmp/trace/%s_0", buf->name);
- result = fd = open(tmp, O_WRONLY | O_CREAT | O_TRUNC, 00600);
- if(result == -1) {
- PERROR("open");
- return -1;
- }
- buf->file_fd = fd;
- free(tmp);
-
- list_add(&buf->list, &buffers);
-
- return 0;
-}
+/* return value: 0 = subbuffer is finished, it won't produce data anymore
+ * 1 = got subbuffer successfully
+ * <0 = error
+ */
int get_subbuffer(struct buffer_info *buf)
{
int result;
asprintf(&send_msg, "get_subbuffer %s", buf->name);
- result = send_message(buf->pid, send_msg, &received_msg);
+ result = ustcomm_send_request(&buf->conn, send_msg, &received_msg);
if(result < 0) {
- ERR("get_subbuffer: send_message failed");
+ ERR("get_subbuffer: ustcomm_send_request failed");
return -1;
}
free(send_msg);
result = sscanf(received_msg, "%as %ld", &rep_code, &buf->consumed_old);
- if(result != 2) {
+ if(result != 2 && result != 1) {
ERR("unable to parse response to get_subbuffer");
return -1;
}
- free(received_msg);
+
+ DBG("received msg is %s", received_msg);
if(!strcmp(rep_code, "OK")) {
DBG("got subbuffer %s", buf->name);
retval = 1;
}
+ else if(nth_token_is(received_msg, "END", 0) == 1) {
+ return 0;
+ }
else {
- DBG("did not get subbuffer %s", buf->name);
- retval = 0;
+ DBG("error getting subbuffer %s", buf->name);
+ retval = -1;
}
+ /* FIMXE: free correctly the stuff */
+ free(received_msg);
free(rep_code);
return retval;
}
int result;
asprintf(&send_msg, "put_subbuffer %s %ld", buf->name, buf->consumed_old);
- result = send_message(buf->pid, send_msg, &received_msg);
+ result = ustcomm_send_request(&buf->conn, send_msg, &received_msg);
if(result < 0) {
ERR("put_subbuffer: send_message failed");
return -1;
return bufc-(const char *)buf;
}
+void *consumer_thread(void *arg)
+{
+ struct buffer_info *buf = (struct buffer_info *) arg;
+ int result;
+
+ for(;;) {
+ result = get_subbuffer(buf);
+ if(result == -1) {
+ ERR("error getting subbuffer");
+ continue;
+ }
+ if(result == 0) {
+ /* this is done */
+ break;
+ }
+
+ /* write data to file */
+ result = patient_write(buf->file_fd, buf->mem + (buf->consumed_old & (buf->n_subbufs * buf->subbuf_size-1)), buf->subbuf_size);
+ if(result == -1) {
+ PERROR("write");
+ /* FIXME: maybe drop this trace */
+ }
+
+ result = put_subbuffer(buf);
+ if(result == -1) {
+ ERR("error putting subbuffer");
+ break;
+ }
+ }
+
+ DBG("thread for buffer %s is stopping", buf->name);
+
+ return NULL;
+}
+
+int add_buffer(pid_t pid, char *bufname)
+{
+ struct buffer_info *buf;
+ char *send_msg;
+ char *received_msg;
+ int result;
+ char *tmp;
+ int fd;
+ pthread_t thr;
+
+ buf = (struct buffer_info *) malloc(sizeof(struct buffer_info));
+ if(buf == NULL) {
+ ERR("add_buffer: insufficient memory");
+ return -1;
+ }
+
+ buf->name = bufname;
+ buf->pid = pid;
+
+ /* connect to app */
+ result = ustcomm_connect_app(buf->pid, &buf->conn);
+ if(result) {
+ ERR("unable to connect to process");
+ return -1;
+ }
+
+ /* get shmid */
+ asprintf(&send_msg, "get_shmid %s", buf->name);
+ ustcomm_send_request(&buf->conn, send_msg, &received_msg);
+ free(send_msg);
+ DBG("got buffer name %s", buf->name);
+
+ result = sscanf(received_msg, "%d", &buf->shmid);
+ if(result != 1) {
+ ERR("unable to parse response to get_shmid");
+ return -1;
+ }
+ free(received_msg);
+ DBG("got shmid %d", buf->shmid);
+
+ /* get n_subbufs */
+ asprintf(&send_msg, "get_n_subbufs %s", buf->name);
+ ustcomm_send_request(&buf->conn, send_msg, &received_msg);
+ free(send_msg);
+
+ result = sscanf(received_msg, "%d", &buf->n_subbufs);
+ if(result != 1) {
+ ERR("unable to parse response to get_n_subbufs");
+ return -1;
+ }
+ free(received_msg);
+ DBG("got n_subbufs %d", buf->n_subbufs);
+
+ /* get subbuf size */
+ asprintf(&send_msg, "get_subbuf_size %s", buf->name);
+ ustcomm_send_request(&buf->conn, send_msg, &received_msg);
+ free(send_msg);
+
+ result = sscanf(received_msg, "%d", &buf->subbuf_size);
+ if(result != 1) {
+ ERR("unable to parse response to get_subbuf_size");
+ return -1;
+ }
+ free(received_msg);
+ DBG("got subbuf_size %d", buf->subbuf_size);
+
+ /* attach memory */
+ buf->mem = shmat(buf->shmid, NULL, 0);
+ if(buf->mem == (void *) 0) {
+ perror("shmat");
+ return -1;
+ }
+ DBG("successfully attached memory");
+
+ /* open file for output */
+ asprintf(&tmp, "/tmp/trace/%s_0", buf->name);
+ result = fd = open(tmp, O_WRONLY | O_CREAT | O_TRUNC, 00600);
+ if(result == -1) {
+ PERROR("open");
+ return -1;
+ }
+ buf->file_fd = fd;
+ free(tmp);
+
+ //list_add(&buf->list, &buffers);
+
+ pthread_create(&thr, NULL, consumer_thread, buf);
+
+ return 0;
+}
+
int main(int argc, char **argv)
{
struct ustcomm_ustd ustd;
/* app loop */
for(;;) {
char *recvbuf;
- struct buffer_info *buf;
- /* 1. check for requests on our public socket */
+ /* check for requests on our public socket */
result = ustcomm_ustd_recv_message(&ustd, &recvbuf, NULL, 100);
if(result == -1) {
ERR("error in ustcomm_ustd_recv_message");
free(recvbuf);
}
-
- /* 2. try to consume data from tracing apps */
- list_for_each_entry(buf, &buffers, list) {
- result = get_subbuffer(buf);
- if(result == -1) {
- ERR("error getting subbuffer");
- continue;
- }
- if(result == 0)
- continue;
-
- /* write data to file */
- //result = write(buf->file_fd, buf->, );
- result = patient_write(buf->file_fd, buf->mem + (buf->consumed_old & (buf->n_subbufs * buf->subbuf_size-1)), buf->subbuf_size);
- if(result == -1) {
- PERROR("write");
- /* FIXME: maybe drop this trace */
- }
-
- result = put_subbuffer(buf);
- if(result == -1) {
- ERR("error putting subbuffer");
- }
- }
}
return 0;
projects / ust.git / blobdiff