#include "ust/ustcmd.h"
#include "usterr.h"
+static int do_cmd(const pid_t pid,
+ const struct ustcomm_header *req_header,
+ const char *req_data,
+ struct ustcomm_header *res_header,
+ char **res_data)
+{
+ int app_fd, result, saved_errno = 0;
+ char *recv_buf;
+
+ if (ustcomm_connect_app(pid, &app_fd)) {
+ ERR("could not connect to PID %u", (unsigned int) pid);
+ errno = ENOTCONN;
+ return -1;
+ }
+
+ recv_buf = zmalloc(USTCOMM_BUFFER_SIZE);
+ if (!recv_buf) {
+ saved_errno = ENOMEM;
+ goto close_app_fd;
+ }
+
+ result = ustcomm_req(app_fd, req_header, req_data, res_header, recv_buf);
+ if (result > 0) {
+ saved_errno = -res_header->result;
+ if (res_header->size == 0 || saved_errno > 0) {
+ free(recv_buf);
+ } else {
+ if (res_data) {
+ *res_data = recv_buf;
+ } else {
+ free(recv_buf);
+ }
+ }
+ } else {
+ ERR("ustcomm req failed");
+ if (result == 0) {
+ saved_errno = ENOTCONN;
+ } else {
+ saved_errno = -result;
+ }
+ free(recv_buf);
+ }
+
+close_app_fd:
+ close(app_fd);
+
+ errno = saved_errno;
+
+ if (errno) {
+ return -1;
+ }
+
+ return 0;
+}
+
pid_t *ustcmd_get_online_pids(void)
{
struct dirent *dirent;
while ((dirent = readdir(dir))) {
if (!strcmp(dirent->d_name, ".") ||
- !strcmp(dirent->d_name, "..")) {
+ !strcmp(dirent->d_name, "..")) {
continue;
}
if (dirent->d_type != DT_DIR &&
- !!strcmp(dirent->d_name, "ustd")) {
+ !!strcmp(dirent->d_name, "ustd")) {
sscanf(dirent->d_name, "%u", (unsigned int *) &ret[i]);
/* FIXME: Here we previously called pid_is_online, which
ret[i] = 0; /* Array end */
if (ret[0] == 0) {
- /* No PID at all */
+ /* No PID at all */
free(ret);
return NULL;
}
* @param pid Traced process ID
* @return 0 if successful, or errors {USTCMD_ERR_GEN, USTCMD_ERR_ARG}
*/
-int ustcmd_set_marker_state(const char *mn, int state, pid_t pid)
+int ustcmd_set_marker_state(const char *channel, const char *marker,
+ int state, pid_t pid)
{
- char *cmd_str [] = {"disable_marker", "enable_marker"};
- char *cmd;
+ struct ustcomm_header req_header, res_header;
+ struct ustcomm_marker_info marker_inf;
int result;
- if (mn == NULL) {
- return USTCMD_ERR_ARG;
- }
-
- if (asprintf(&cmd, "%s %s", cmd_str[state], mn) < 0) {
- ERR("ustcmd_set_marker_state : asprintf failed (%s %s)",
- cmd_str[state], mn);
- return USTCMD_ERR_GEN;
+ result = ustcomm_pack_marker_info(&req_header,
+ &marker_inf,
+ channel,
+ marker);
+ if (result < 0) {
+ errno = -result;
+ return -1;
}
- result = ustcmd_send_cmd(cmd, pid, NULL);
- if (result != 1) {
- free(cmd);
- return USTCMD_ERR_GEN;
- }
+ req_header.command = state ? ENABLE_MARKER : DISABLE_MARKER;
- free(cmd);
- return 0;
+ return do_cmd(pid, &req_header, (char *)&marker_inf,
+ &res_header, NULL);
}
/**
* @param pid Traced process ID
* @return 0 if successful, or error
*/
-int ustcmd_set_subbuf_size(const char *channel_size, pid_t pid)
+int ustcmd_set_subbuf_size(const char *channel, unsigned int subbuf_size,
+ pid_t pid)
{
- char *cmd;
+ struct ustcomm_header req_header, res_header;
+ struct ustcomm_channel_info ch_inf;
int result;
- if (asprintf(&cmd, "%s %s", "set_subbuf_size", channel_size) < 0) {
- ERR("ustcmd_set_subbuf_size : asprintf failed (set_subbuf_size %s)",
- channel_size);
+ result = ustcomm_pack_channel_info(&req_header,
+ &ch_inf,
+ channel);
+ if (result < 0) {
+ errno = -result;
return -1;
}
- result = ustcmd_send_cmd(cmd, pid, NULL);
- if (result != 1) {
- free(cmd);
- return 1;
- }
+ req_header.command = SET_SUBBUF_SIZE;
+ ch_inf.subbuf_size = subbuf_size;
- free(cmd);
- return 0;
+ return do_cmd(pid, &req_header, (char *)&ch_inf,
+ &res_header, NULL);
}
/**
* @param pid Traced process ID
* @return 0 if successful, or error
*/
-int ustcmd_set_subbuf_num(const char *channel_size, pid_t pid)
+int ustcmd_set_subbuf_num(const char *channel, unsigned int num,
+ pid_t pid)
{
- char *cmd;
+ struct ustcomm_header req_header, res_header;
+ struct ustcomm_channel_info ch_inf;
int result;
- if (asprintf(&cmd, "%s %s", "set_subbuf_num", channel_size) < 0) {
- ERR("ustcmd_set_subbuf_num : asprintf failed (set_subbuf_num %s",
- channel_size);
+ result = ustcomm_pack_channel_info(&req_header,
+ &ch_inf,
+ channel);
+ if (result < 0) {
+ errno = -result;
return -1;
}
- result = ustcmd_send_cmd(cmd, pid, NULL);
- if (result != 1) {
- free(cmd);
- return 1;
- }
+ req_header.command = SET_SUBBUF_NUM;
+ ch_inf.subbuf_num = num;
+
+ return do_cmd(pid, &req_header, (char *)&ch_inf,
+ &res_header, NULL);
- free(cmd);
- return 0;
}
-/**
- * Get subbuffer size.
- *
- * @param channel Channel name
- * @param pid Traced process ID
- * @return subbuf size if successful, or error
- */
-int ustcmd_get_subbuf_size(const char *channel, pid_t pid)
+static int ustcmd_get_subbuf_num_size(const char *channel, pid_t pid,
+ int *num, int *size)
{
- char *cmd, *reply;
+ struct ustcomm_header req_header, res_header;
+ struct ustcomm_channel_info ch_inf, *ch_inf_res;
int result;
- /* format: channel_cpu */
- if (asprintf(&cmd, "%s %s_0", "get_subbuf_size", channel) < 0) {
- ERR("ustcmd_get_subbuf_size : asprintf failed (get_subbuf_size, %s_0",
- channel);
+
+ result = ustcomm_pack_channel_info(&req_header,
+ &ch_inf,
+ channel);
+ if (result < 0) {
+ errno = -result;
return -1;
}
- result = ustcmd_send_cmd(cmd, pid, &reply);
- if (result != 1) {
- free(cmd);
+ req_header.command = GET_SUBBUF_NUM_SIZE;
+
+ result = do_cmd(pid, &req_header, (char *)&ch_inf,
+ &res_header, (char **)&ch_inf_res);
+ if (result < 0) {
return -1;
}
- result = atoi(reply);
- free(cmd);
- free(reply);
- return result;
+ *num = ch_inf_res->subbuf_num;
+ *size = ch_inf_res->subbuf_size;
+
+ free(ch_inf_res);
+
+ return 0;
}
/**
*/
int ustcmd_get_subbuf_num(const char *channel, pid_t pid)
{
- char *cmd, *reply;
- int result;
+ int num, size, result;
- /* format: channel_cpu */
- if (asprintf(&cmd, "%s %s_0", "get_n_subbufs", channel) < 0) {
- ERR("ustcmd_get_subbuf_num : asprintf failed (get_n_subbufs, %s_0",
- channel);
+ result = ustcmd_get_subbuf_num_size(channel, pid,
+ &num, &size);
+ if (result < 0) {
+ errno = -result;
return -1;
}
- result = ustcmd_send_cmd(cmd, pid, &reply);
- if (result != 1) {
- free(cmd);
+ return num;
+}
+
+/**
+ * Get subbuffer size.
+ *
+ * @param channel Channel name
+ * @param pid Traced process ID
+ * @return subbuf size if successful, or error
+ */
+int ustcmd_get_subbuf_size(const char *channel, pid_t pid)
+{
+ int num, size, result;
+
+ result = ustcmd_get_subbuf_num_size(channel, pid,
+ &num, &size);
+ if (result < 0) {
+ errno = -result;
return -1;
}
- result = atoi(reply);
- free(cmd);
- free(reply);
- return result;
+ return size;
}
/**
*/
int ustcmd_destroy_trace(pid_t pid)
{
- int result;
+ struct ustcomm_header req_header, res_header;
- result = ustcmd_send_cmd("trace_destroy", pid, NULL);
- if (result != 1) {
- return USTCMD_ERR_GEN;
- }
+ req_header.command = DESTROY_TRACE;
+ req_header.size = 0;
- return 0;
+ return do_cmd(pid, &req_header, NULL, &res_header, NULL);
}
/**
*/
int ustcmd_setup_and_start(pid_t pid)
{
- int result;
+ struct ustcomm_header req_header, res_header;
- result = ustcmd_send_cmd("start", pid, NULL);
- if (result != 1) {
- return USTCMD_ERR_GEN;
- }
+ req_header.command = START;
+ req_header.size = 0;
- return 0;
+ return do_cmd(pid, &req_header, NULL, &res_header, NULL);
}
/**
*/
int ustcmd_create_trace(pid_t pid)
{
- int result;
+ struct ustcomm_header req_header, res_header;
- result = ustcmd_send_cmd("trace_create", pid, NULL);
- if (result != 1) {
- return USTCMD_ERR_GEN;
- }
+ req_header.command = CREATE_TRACE;
+ req_header.size = 0;
- return 0;
+ return do_cmd(pid, &req_header, NULL, &res_header, NULL);
}
/**
*/
int ustcmd_start_trace(pid_t pid)
{
- int result;
+ struct ustcomm_header req_header, res_header;
- result = ustcmd_send_cmd("trace_start", pid, NULL);
- if (result != 1) {
- return USTCMD_ERR_GEN;
- }
+ req_header.command = START_TRACE;
+ req_header.size = 0;
- return 0;
+ return do_cmd(pid, &req_header, NULL, &res_header, NULL);
}
/**
*/
int ustcmd_alloc_trace(pid_t pid)
{
- int result;
+ struct ustcomm_header req_header, res_header;
- result = ustcmd_send_cmd("trace_alloc", pid, NULL);
- if (result != 1) {
- return USTCMD_ERR_GEN;
- }
+ req_header.command = ALLOC_TRACE;
+ req_header.size = 0;
- return 0;
+ return do_cmd(pid, &req_header, NULL, &res_header, NULL);
}
/**
*/
int ustcmd_stop_trace(pid_t pid)
{
- int result;
+ struct ustcomm_header req_header, res_header;
- result = ustcmd_send_cmd("trace_stop", pid, NULL);
- if (result != 1) {
- return USTCMD_ERR_GEN;
- }
+ req_header.command = STOP_TRACE;
+ req_header.size = 0;
- return 0;
+ return do_cmd(pid, &req_header, NULL, &res_header, NULL);
}
/**
*/
int ustcmd_get_cmsf(struct marker_status **cmsf, const pid_t pid)
{
+ struct ustcomm_header req_header, res_header;
char *big_str = NULL;
- int result;
+ int result, app_fd;
struct marker_status *tmp_cmsf = NULL;
unsigned int i = 0, cmsf_ind = 0;
if (cmsf == NULL) {
return -1;
}
- result = ustcmd_send_cmd("list_markers", pid, &big_str);
- if (result != 1) {
- ERR("error while getting markers list");
+
+ if (ustcomm_connect_app(pid, &app_fd)) {
+ ERR("could not connect to PID %u", (unsigned int) pid);
+ return -1;
+ }
+
+ req_header.command = LIST_MARKERS;
+ req_header.size = 0;
+
+ result = ustcomm_send(app_fd, &req_header, NULL);
+ if (result <= 0) {
+ PERROR("error while requesting markers list for process %d", pid);
return -1;
}
- tmp_cmsf = (struct marker_status *) malloc(sizeof(struct marker_status) *
- (ustcmd_count_nl(big_str) + 1));
+ result = ustcomm_recv_alloc(app_fd, &res_header, &big_str);
+ if (result <= 0) {
+ ERR("error while receiving markers list");
+ return -1;
+ }
+
+ close(app_fd);
+
+ tmp_cmsf = (struct marker_status *) zmalloc(sizeof(struct marker_status) *
+ (ustcmd_count_nl(big_str) + 1));
if (tmp_cmsf == NULL) {
ERR("Failed to allocate CMSF array");
return -1;
char state;
sscanf(big_str + i, "marker: %a[^/]/%a[^ ] %c %a[^\n]",
- &tmp_cmsf[cmsf_ind].channel,
- &tmp_cmsf[cmsf_ind].marker,
- &state,
- &tmp_cmsf[cmsf_ind].fs);
+ &tmp_cmsf[cmsf_ind].channel,
+ &tmp_cmsf[cmsf_ind].marker,
+ &state,
+ &tmp_cmsf[cmsf_ind].fs);
tmp_cmsf[cmsf_ind].state = (state == USTCMD_MS_CHR_ON ?
- USTCMD_MS_ON : USTCMD_MS_OFF); /* Marker state */
+ USTCMD_MS_ON : USTCMD_MS_OFF); /* Marker state */
while (big_str[i] != '\n') {
++i; /* Go to next '\n' */
* @return 0 if successful, or -1 on error
*/
int ustcmd_get_tes(struct trace_event_status **tes,
- const pid_t pid)
+ const pid_t pid)
{
+ struct ustcomm_header req_header, res_header;
char *big_str = NULL;
- int result;
+ int result, app_fd;
struct trace_event_status *tmp_tes = NULL;
unsigned int i = 0, tes_ind = 0;
return -1;
}
- result = ustcmd_send_cmd("list_trace_events", pid, &big_str);
+ if (ustcomm_connect_app(pid, &app_fd)) {
+ ERR("could not connect to PID %u", (unsigned int) pid);
+ return -1;
+ }
+
+ req_header.command = LIST_TRACE_EVENTS;
+ req_header.size = 0;
+
+ result = ustcomm_send(app_fd, &req_header, NULL);
+ if (result != 1) {
+ ERR("error while requesting trace_event list");
+ return -1;
+ }
+
+ result = ustcomm_recv_alloc(app_fd, &res_header, &big_str);
if (result != 1) {
- ERR("error while getting trace_event list");
+ ERR("error while receiving markers list");
return -1;
}
+ close(app_fd);
+
tmp_tes = (struct trace_event_status *)
zmalloc(sizeof(struct trace_event_status) *
(ustcmd_count_nl(big_str) + 1));
/* Parse received reply string (format: "[name]"): */
while (big_str[i] != '\0') {
- char state;
-
sscanf(big_str + i, "trace_event: %a[^\n]",
- &tmp_tes[tes_ind].name);
+ &tmp_tes[tes_ind].name);
while (big_str[i] != '\n') {
++i; /* Go to next '\n' */
}
*/
int ustcmd_set_sock_path(const char *sock_path, pid_t pid)
{
- char *cmd;
- int result;
-
- if (asprintf(&cmd, "%s %s", "set_sock_path", sock_path) < 0) {
- ERR("ustcmd_set_sock_path : asprintf failed (set_sock_path, %s",
- sock_path);
+ int offset = 0;
+ struct ustcomm_header req_header, res_header;
+ struct ustcomm_sock_path sock_path_msg;
+
+ sock_path_msg.sock_path = ustcomm_print_data(sock_path_msg.data,
+ sizeof(sock_path_msg.data),
+ &offset,
+ sock_path);
+ if (sock_path_msg.sock_path == USTCOMM_POISON_PTR) {
return -1;
}
- result = ustcmd_send_cmd(cmd, pid, NULL);
- if (result != 1) {
- free(cmd);
- return USTCMD_ERR_GEN;
- }
+ req_header.command = SET_SOCK_PATH;
+ req_header.size = COMPUTE_MSG_SIZE(&sock_path_msg, offset);
- free(cmd);
- return 0;
+ return do_cmd(pid, &req_header, (char *)&sock_path_msg,
+ &res_header, NULL);
}
/**
*/
int ustcmd_get_sock_path(char **sock_path, pid_t pid)
{
- char *cmd, *reply;
int result;
+ struct ustcomm_header req_header, res_header;
+ struct ustcomm_sock_path *sock_path_msg;
+
+ req_header.command = GET_SOCK_PATH;
+ req_header.size = 0;
- if (asprintf(&cmd, "%s", "get_sock_path") < 0) {
- ERR("ustcmd_get_sock_path : asprintf failed");
- return USTCMD_ERR_GEN;
+ result = do_cmd(pid, &req_header, NULL, &res_header,
+ (char **)&sock_path_msg);
+ if (result < 0) {
+ return -1;
}
- result = ustcmd_send_cmd(cmd, pid, &reply);
- if (result != 1) {
- free(cmd);
- return USTCMD_ERR_GEN;
+ result = ustcomm_unpack_sock_path(sock_path_msg);
+ if (result < 0) {
+ return result;
}
- free(cmd);
- *sock_path = reply;
- return 0;
-}
+ *sock_path = strdup(sock_path_msg->sock_path);
-int ustcmd_force_switch(pid_t pid)
-{
- int result;
-
- result = ustcmd_send_cmd("force_switch", pid, NULL);
- if (result != 1) {
- return USTCMD_ERR_GEN;
- }
+ free(sock_path_msg);
return 0;
}
-/**
- * Sends a given command to a traceable process
- *
- * @param cmd Null-terminated command to send
- * @param pid Targeted PID
- * @param reply Pointer to string to be filled with a reply string (must
- * be NULL if no reply is needed for the given command).
- * @return -1 if not successful, 0 on EOT, 1 on success
- */
-
-int ustcmd_send_cmd(const char *cmd, const pid_t pid, char **reply)
+int ustcmd_force_switch(pid_t pid)
{
- int app_fd;
- int retval;
+ struct ustcomm_header req_header, res_header;
- if (ustcomm_connect_app(pid, &app_fd)) {
- ERR("could not connect to PID %u", (unsigned int) pid);
- return -1;
- }
+ req_header.command = FORCE_SUBBUF_SWITCH;
+ req_header.size = 0;
- retval = ustcomm_send_request(app_fd, cmd, reply);
-
- close(app_fd);
-
- return retval;
+ return do_cmd(pid, &req_header, NULL, &res_header, NULL);
}
+
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