curl_easy_perform_ev: debug/test function
This function is meant to work *exactly* as curl_easy_perform() but will use the event-based libcurl API internally instead of curl_multi_perform(). To avoid relying on an actual event-based library and to not use non-portable functions (like epoll or similar), there's a rather inefficient emulation layer implemented on top of Curl_poll() instead. There's currently some convenience logging done in curl_easy_perform_ev which helps when tracking down problems. They may be suitable to remove or change once things seem to be fine enough. curl has a new --test-event option when built with debug enabled that then uses curl_easy_perform_ev() instead of curl_easy_perform(). If built without debug, using --test-event will only output a warning message. NOTE: curl_easy_perform_ev() is not part if the public API on purpose. It is only present in debug builds of libcurl and MUST NOT be considered stable even then. Use it for libcurl-testing purposes only. runtests.pl now features an -e command line option that makes it use --test-event for all curl command line tests. The man page is updated.
This commit is contained in:
Daniel Stenberg
parent
062e5bfd9c
commit
6cf8413e31
414
lib/easy.c
414
lib/easy.c
@ -453,70 +453,275 @@ CURLcode curl_easy_setopt(CURL *curl, CURLoption tag, ...)
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return ret;
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}
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/*
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* curl_easy_perform() is the external interface that performs a blocking
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* transfer as previously setup.
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#ifdef CURLDEBUG
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struct monitor {
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struct monitor *next; /* the next node in the list or NULL */
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struct pollfd socket; /* socket info of what to monitor */
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};
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struct events {
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long ms; /* timeout, run the timeout function when reached */
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bool msbump; /* set TRUE when timeout is set by callback */
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int num_sockets; /* number of nodes in the monitor list */
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struct monitor *list; /* list of sockets to monitor */
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int running_handles; /* store the returned number */
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};
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/* events_timer
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*
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* CONCEPT: This function creates a multi handle, adds the easy handle to it,
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* runs curl_multi_perform() until the transfer is done, then detaches the
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* easy handle, destroys the multi handle and returns the easy handle's return
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* code.
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*
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* REALITY: it can't just create and destroy the multi handle that easily. It
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* needs to keep it around since if this easy handle is used again by this
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* function, the same multi handle must be re-used so that the same pools and
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* caches can be used.
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* Callback that gets called with a new value when the timeout should be
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* updated.
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*/
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CURLcode curl_easy_perform(CURL *easy)
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static int events_timer(CURLM *multi, /* multi handle */
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long timeout_ms, /* see above */
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void *userp) /* private callback pointer */
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{
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struct events *ev = userp;
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(void)multi;
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if(timeout_ms == -1)
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/* timeout removed */
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timeout_ms = 0;
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else if(timeout_ms == 0)
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/* timeout is already reached! */
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timeout_ms = 1; /* trigger asap */
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ev->ms = timeout_ms;
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ev->msbump = TRUE;
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/* fprintf(stderr, "%s: timeout %ld\n", __func__, timeout_ms); */
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return 0;
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}
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/* poll2cselect
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*
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* convert from poll() bit definitions to libcurl's CURL_CSELECT_* ones
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*/
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static int poll2cselect(int pollmask)
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{
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int omask=0;
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if(pollmask & POLLIN)
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omask |= CURL_CSELECT_IN;
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if(pollmask & POLLOUT)
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omask |= CURL_CSELECT_OUT;
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if(pollmask & POLLERR)
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omask |= CURL_CSELECT_ERR;
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return omask;
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}
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/* socketcb2poll
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*
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* convert from libcurl' CURL_POLL_* bit definitions to poll()'s
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*/
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static short socketcb2poll(int pollmask)
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{
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short omask=0;
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if(pollmask & CURL_POLL_IN)
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omask |= POLLIN;
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if(pollmask & CURL_POLL_OUT)
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omask |= POLLOUT;
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return omask;
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}
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/* events_socket
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*
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* Callback that gets called with information about socket activity to
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* monitor.
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*/
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static int events_socket(CURL *easy, /* easy handle */
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curl_socket_t s, /* socket */
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int what, /* see above */
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void *userp, /* private callback
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pointer */
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void *socketp) /* private socket
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pointer */
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{
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struct events *ev = userp;
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struct monitor *m;
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struct monitor *prev=NULL;
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(void)socketp;
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m = ev->list;
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while(m) {
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if(m->socket.fd == s) {
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if(what == CURL_POLL_REMOVE) {
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struct monitor *nxt = m->next;
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/* remove this node from the list of monitored sockets */
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if(prev)
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prev->next = nxt;
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else
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ev->list = nxt;
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free(m);
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m = nxt;
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infof(easy, "socket cb: socket %d REMOVED\n", s);
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}
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else {
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/* The socket 's' is already being monitored, update the activity
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mask. Convert from libcurl bitmask to the poll one. */
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m->socket.events = socketcb2poll(what);
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infof(easy, "socket cb: socket %d UPDATED as %s%s\n", s,
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what&CURL_POLL_IN?"IN":"",
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what&CURL_POLL_OUT?"OUT":"");
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}
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break;
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}
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prev = m;
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m = m->next; /* move to next node */
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}
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if(!m) {
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if(what == CURL_POLL_REMOVE) {
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/* this happens a bit too often, libcurl fix perhaps? */
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/* fprintf(stderr,
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"%s: socket %d asked to be REMOVED but not present!\n",
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__func__, s); */
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}
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else {
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m = malloc(sizeof(struct monitor));
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m->next = ev->list;
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m->socket.fd = s;
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m->socket.events = socketcb2poll(what);
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m->socket.revents = 0;
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ev->list = m;
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infof(easy, "socket cb: socket %d ADDED as %s%s\n", s,
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what&CURL_POLL_IN?"IN":"",
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what&CURL_POLL_OUT?"OUT":"");
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}
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}
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return 0;
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}
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/*
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* events_setup()
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*
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* Do the multi handle setups that only event-based transfers need.
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*/
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static void events_setup(CURLM *multi, struct events *ev)
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{
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/* timer callback */
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curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, events_timer);
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curl_multi_setopt(multi, CURLMOPT_TIMERDATA, ev);
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/* socket callback */
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curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, events_socket);
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curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, ev);
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}
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/* wait_or_timeout()
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*
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* waits for activity on any of the given sockets, or the timeout to trigger.
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*/
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static CURLcode wait_or_timeout(struct Curl_multi *multi, struct events *ev)
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{
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CURLM *multi;
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CURLMcode mcode;
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CURLcode code = CURLE_OK;
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CURLMsg *msg;
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bool done = FALSE;
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int rc;
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struct SessionHandle *data = easy;
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CURLMcode mcode;
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CURLcode rc = CURLE_OK;
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while(!done) {
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CURLMsg *msg;
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struct monitor *m;
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struct pollfd *f;
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struct pollfd fds[4];
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int numfds=0;
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int pollrc;
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int i;
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struct timeval before;
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struct timeval after;
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/* populate the fds[] array */
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for(m = ev->list, f=&fds[0]; m; m = m->next) {
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f->fd = m->socket.fd;
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f->events = m->socket.events;
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f->revents = 0;
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/* fprintf(stderr, "poll() %d check socket %d\n", numfds, f->fd); */
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f++;
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numfds++;
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}
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/* get the time stamp to use to figure out how long poll takes */
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before = curlx_tvnow();
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/* fprintf(stderr, "poll(), %d numfds\n", numfds); */
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/* wait for activity or timeout */
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pollrc = Curl_poll(fds, numfds, (int)ev->ms);
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after = curlx_tvnow();
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ev->msbump = FALSE; /* reset here */
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if(0 == pollrc) {
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/* timeout! */
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ev->ms = 0;
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/* fprintf(stderr, "call curl_multi_socket_action( TIMEOUT )\n"); */
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mcode = curl_multi_socket_action(multi, CURL_SOCKET_TIMEOUT, 0,
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&ev->running_handles);
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}
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else if(pollrc > 0) {
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/* loop over the monitored sockets to see which ones had activity */
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for(i = 0; i< numfds; i++) {
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if(fds[i].revents) {
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/* socket activity, tell libcurl */
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int act = poll2cselect(fds[i].revents); /* convert */
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infof(multi->easyp, "call curl_multi_socket_action( socket %d )\n",
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fds[i].fd);
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mcode = curl_multi_socket_action(multi, fds[i].fd, act,
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&ev->running_handles);
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}
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}
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if(!ev->msbump)
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/* If nothing updated the timeout, we decrease it by the spent time.
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* If it was updated, it has the new timeout time stored already.
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*/
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ev->ms += curlx_tvdiff(after, before);
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}
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if(mcode)
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return CURLE_URL_MALFORMAT; /* TODO: return a proper error! */
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/* we don't really care about the "msgs_in_queue" value returned in the
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second argument */
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msg = curl_multi_info_read(multi, &pollrc);
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if(msg) {
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rc = msg->data.result;
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done = TRUE;
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}
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}
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return rc;
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}
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/* easy_events()
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*
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* Runs a transfer in a blocking manner using the events-based API
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*/
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static CURLcode easy_events(CURLM *multi)
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{
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struct events evs= {2, FALSE, 0, NULL, 0};
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/* if running event-based, do some further multi inits */
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events_setup(multi, &evs);
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return wait_or_timeout(multi, &evs);
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}
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#endif
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static CURLcode easy_transfer(CURLM *multi)
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{
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bool done = FALSE;
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CURLMcode mcode = CURLM_OK;
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CURLcode code;
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struct timeval before;
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int without_fds = 0; /* count number of consecutive returns from
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curl_multi_wait() without any filedescriptors */
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struct timeval before;
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SIGPIPE_VARIABLE(pipe_st);
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if(!easy)
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return CURLE_BAD_FUNCTION_ARGUMENT;
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if(data->multi) {
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failf(data, "easy handled already used in multi handle");
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return CURLE_FAILED_INIT;
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}
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if(data->multi_easy)
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multi = data->multi_easy;
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else {
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/* this multi handle will only ever have a single easy handled attached
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to it, so make it use minimal hashes */
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multi = Curl_multi_handle(1, 3);
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if(!multi)
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return CURLE_OUT_OF_MEMORY;
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data->multi_easy = multi;
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}
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/* Copy the MAXCONNECTS option to the multi handle */
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curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, data->set.maxconnects);
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mcode = curl_multi_add_handle(multi, easy);
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if(mcode) {
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curl_multi_cleanup(multi);
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if(mcode == CURLM_OUT_OF_MEMORY)
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return CURLE_OUT_OF_MEMORY;
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else
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return CURLE_FAILED_INIT;
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}
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sigpipe_ignore(data, &pipe_st);
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/* assign this after curl_multi_add_handle() since that function checks for
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it and rejects this handle otherwise */
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data->multi = multi;
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while(!done && !mcode) {
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int still_running;
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@ -556,13 +761,82 @@ CURLcode curl_easy_perform(CURL *easy)
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/* only read 'still_running' if curl_multi_perform() return OK */
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if((mcode == CURLM_OK) && !still_running) {
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msg = curl_multi_info_read(multi, &rc);
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int rc;
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CURLMsg *msg = curl_multi_info_read(multi, &rc);
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if(msg) {
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code = msg->data.result;
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done = TRUE;
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}
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}
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}
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return code;
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}
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/*
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* easy_perform() is the external interface that performs a blocking
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* transfer as previously setup.
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*
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* CONCEPT: This function creates a multi handle, adds the easy handle to it,
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* runs curl_multi_perform() until the transfer is done, then detaches the
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* easy handle, destroys the multi handle and returns the easy handle's return
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* code.
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*
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* REALITY: it can't just create and destroy the multi handle that easily. It
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* needs to keep it around since if this easy handle is used again by this
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* function, the same multi handle must be re-used so that the same pools and
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* caches can be used.
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*
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* DEBUG: if 'events' is set TRUE, this function will use a replacement engine
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* instead of curl_multi_perform() and use curl_multi_socket_action().
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*/
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static CURLcode easy_perform(CURL *easy, bool events)
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{
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CURLM *multi;
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CURLMcode mcode;
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CURLcode code = CURLE_OK;
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struct SessionHandle *data = easy;
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SIGPIPE_VARIABLE(pipe_st);
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if(!easy)
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return CURLE_BAD_FUNCTION_ARGUMENT;
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if(data->multi) {
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failf(data, "easy handled already used in multi handle");
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return CURLE_FAILED_INIT;
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}
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if(data->multi_easy)
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multi = data->multi_easy;
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else {
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/* this multi handle will only ever have a single easy handled attached
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to it, so make it use minimal hashes */
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multi = Curl_multi_handle(1, 3);
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if(!multi)
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return CURLE_OUT_OF_MEMORY;
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data->multi_easy = multi;
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}
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/* Copy the MAXCONNECTS option to the multi handle */
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curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, data->set.maxconnects);
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mcode = curl_multi_add_handle(multi, easy);
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if(mcode) {
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curl_multi_cleanup(multi);
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if(mcode == CURLM_OUT_OF_MEMORY)
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return CURLE_OUT_OF_MEMORY;
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else
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return CURLE_FAILED_INIT;
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}
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sigpipe_ignore(data, &pipe_st);
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/* assign this after curl_multi_add_handle() since that function checks for
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it and rejects this handle otherwise */
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data->multi = multi;
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/* run the transfer */
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code = events ? easy_events(multi) : easy_transfer(multi);
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/* ignoring the return code isn't nice, but atm we can't really handle
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a failure here, room for future improvement! */
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@ -574,6 +848,28 @@ CURLcode curl_easy_perform(CURL *easy)
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return code;
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}
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/*
|
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* curl_easy_perform() is the external interface that performs a blocking
|
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* transfer as previously setup.
|
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*/
|
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CURLcode curl_easy_perform(CURL *easy)
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{
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return easy_perform(easy, FALSE);
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}
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#ifdef CURLDEBUG
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/*
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* curl_easy_perform_ev() is the external interface that performs a blocking
|
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* transfer using the event-based API internally.
|
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*/
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CURLcode curl_easy_perform_ev(CURL *easy)
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{
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return easy_perform(easy, TRUE);
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}
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#endif
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/*
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* curl_easy_cleanup() is the external interface to cleaning/freeing the given
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* easy handle.
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@ -25,6 +25,9 @@
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/*
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* Prototypes for library-wide functions provided by easy.c
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*/
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#ifdef CURLDEBUG
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CURLcode curl_easy_perform_ev(CURL *easy);
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#endif
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#endif /* HEADER_CURL_EASYIF_H */
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@ -7,7 +7,7 @@
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
|
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* Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
|
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*
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||||
* This software is licensed as described in the file COPYING, which
|
||||
* you should have received as part of this distribution. The terms
|
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@ -205,6 +205,9 @@ struct Configurable {
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bool use_metalink; /* process given URLs as metalink XML file */
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metalinkfile *metalinkfile_list; /* point to the first node */
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metalinkfile *metalinkfile_last; /* point to the last/current node */
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#ifdef CURLDEBUG
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bool test_event_based;
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#endif
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}; /* struct Configurable */
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void free_config_fields(struct Configurable *config);
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|
||||
@ -174,6 +174,7 @@ static const struct LongShort aliases[]= {
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||||
{"$I", "post303", FALSE},
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{"$J", "metalink", FALSE},
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||||
{"$K", "sasl-ir", FALSE},
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||||
{"$L", "test-event", FALSE},
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||||
{"0", "http1.0", FALSE},
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||||
{"1", "tlsv1", FALSE},
|
||||
{"2", "sslv2", FALSE},
|
||||
@ -961,6 +962,13 @@ ParameterError getparameter(char *flag, /* f or -long-flag */
|
||||
case 'K': /* --sasl-ir */
|
||||
config->sasl_ir = toggle;
|
||||
break;
|
||||
case 'L': /* --test-event */
|
||||
#ifdef CURLDEBUG
|
||||
config->test_event_based = toggle;
|
||||
#else
|
||||
warnf(config, "--test-event is ignored unless a debug build!\n");
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case '#': /* --progress-bar */
|
||||
|
||||
@ -81,6 +81,11 @@
|
||||
|
||||
#include "memdebug.h" /* keep this as LAST include */
|
||||
|
||||
#ifdef CURLDEBUG
|
||||
/* libcurl's debug builds provide an extra function */
|
||||
CURLcode curl_easy_perform_ev(CURL *easy);
|
||||
#endif
|
||||
|
||||
#define CURLseparator "--_curl_--"
|
||||
|
||||
#ifndef O_BINARY
|
||||
@ -1450,6 +1455,11 @@ int operate(struct Configurable *config, int argc, argv_item_t argv[])
|
||||
mlfile->filename, this_url);
|
||||
#endif /* USE_METALINK */
|
||||
|
||||
#ifdef CURLDEBUG
|
||||
if(config->test_event_based)
|
||||
res = curl_easy_perform_ev(curl);
|
||||
else
|
||||
#endif
|
||||
res = curl_easy_perform(curl);
|
||||
|
||||
if(outs.is_cd_filename && outs.stream && !config->mute &&
|
||||
|
||||
@ -5,7 +5,7 @@
|
||||
.\" * | (__| |_| | _ <| |___
|
||||
.\" * \___|\___/|_| \_\_____|
|
||||
.\" *
|
||||
.\" * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
|
||||
.\" * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
|
||||
.\" *
|
||||
.\" * This software is licensed as described in the file COPYING, which
|
||||
.\" * you should have received as part of this distribution. The terms
|
||||
@ -53,6 +53,10 @@ Provide a custom curl binary to run the tests with. Default is the curl
|
||||
executable in the build tree.
|
||||
.IP "-d"
|
||||
Enable protocol debug: have the servers display protocol output.
|
||||
.IP "-e"
|
||||
Run the test event-based (if possible). This will make runtests invoke curl
|
||||
with --test-event option. This option only works if both curl and libcurl were
|
||||
built debug-enabled.
|
||||
.IP "-g"
|
||||
Run the given test(s) with gdb. This is best used on a single test case and
|
||||
curl built --disable-shared. This then fires up gdb with command line set to
|
||||
|
||||
@ -274,6 +274,7 @@ my $gdbxwin; # use windowed gdb when using gdb
|
||||
my $keepoutfiles; # keep stdout and stderr files after tests
|
||||
my $listonly; # only list the tests
|
||||
my $postmortem; # display detailed info about failed tests
|
||||
my $run_event_based; # run curl with --test-event to test the event API
|
||||
|
||||
my %run; # running server
|
||||
my %doesntrun; # servers that don't work, identified by pidfile
|
||||
@ -2710,7 +2711,11 @@ sub timestampskippedevents {
|
||||
# Run a single specified test case
|
||||
#
|
||||
sub singletest {
|
||||
my ($testnum, $count, $total)=@_;
|
||||
my ($evbased, # 1 means switch on if possible (and "curl" is tested)
|
||||
# returns "not a test" if it can't be used for this test
|
||||
$testnum,
|
||||
$count,
|
||||
$total)=@_;
|
||||
|
||||
my @what;
|
||||
my $why;
|
||||
@ -3127,6 +3132,7 @@ sub singletest {
|
||||
my $CMDLINE;
|
||||
my $cmdargs;
|
||||
my $cmdtype = $cmdhash{'type'} || "default";
|
||||
my $fail_due_event_based = $evbased;
|
||||
if($cmdtype eq "perl") {
|
||||
# run the command line prepended with "perl"
|
||||
$cmdargs ="$cmd";
|
||||
@ -3142,15 +3148,22 @@ sub singletest {
|
||||
$disablevalgrind=1;
|
||||
}
|
||||
elsif(!$tool) {
|
||||
# run curl, add --verbose for debug information output
|
||||
# run curl, add suitable command line options
|
||||
$cmd = "-1 ".$cmd if(exists $feature{"SSL"} && ($has_axtls));
|
||||
|
||||
my $inc="";
|
||||
if((!$cmdhash{'option'}) || ($cmdhash{'option'} !~ /no-include/)) {
|
||||
$inc = "--include ";
|
||||
$inc = " --include";
|
||||
}
|
||||
|
||||
$cmdargs ="$out $inc--trace-ascii log/trace$testnum --trace-time $cmd";
|
||||
$cmdargs = "$out$inc ";
|
||||
$cmdargs .= "--trace-ascii log/trace$testnum ";
|
||||
$cmdargs .= "--trace-time ";
|
||||
if($evbased) {
|
||||
$cmdargs .= "--test-event ";
|
||||
$fail_due_event_based--;
|
||||
}
|
||||
$cmdargs .= $cmd;
|
||||
}
|
||||
else {
|
||||
$cmdargs = " $cmd"; # $cmd is the command line for the test file
|
||||
@ -3171,6 +3184,11 @@ sub singletest {
|
||||
$DBGCURL=$CMDLINE;
|
||||
}
|
||||
|
||||
if($fail_due_event_based) {
|
||||
logmsg "This test cannot run event based\n";
|
||||
return -1;
|
||||
}
|
||||
|
||||
my @stdintest = getpart("client", "stdin");
|
||||
|
||||
if(@stdintest) {
|
||||
@ -3755,6 +3773,8 @@ sub singletest {
|
||||
else {
|
||||
$ok .= "-"; # valgrind not checked
|
||||
}
|
||||
# add 'E' for event-based
|
||||
$ok .= $evbased ? "E" : "-";
|
||||
|
||||
logmsg "$ok " if(!$short);
|
||||
|
||||
@ -4454,6 +4474,10 @@ while(@ARGV) {
|
||||
# continue anyway, even if a test fail
|
||||
$anyway=1;
|
||||
}
|
||||
elsif($ARGV[0] eq "-e") {
|
||||
# run the tests cases event based if possible
|
||||
$run_event_based=1;
|
||||
}
|
||||
elsif($ARGV[0] eq "-p") {
|
||||
$postmortem=1;
|
||||
}
|
||||
@ -4825,7 +4849,7 @@ foreach $testnum (@at) {
|
||||
$lasttest = $testnum if($testnum > $lasttest);
|
||||
$count++;
|
||||
|
||||
my $error = singletest($testnum, $count, scalar(@at));
|
||||
my $error = singletest($run_event_based, $testnum, $count, scalar(@at));
|
||||
if($error < 0) {
|
||||
# not a test we can run
|
||||
next;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user