freetdm: allocate channels in their own memory page when debugging

diff --git a/libs/freetdm/src/ftdm_io.c b/libs/freetdm/src/ftdm_io.c
index 9914796597c62601750f28d71130b5a8251a6358..4d9b5226205a84b22fb05769230c36af2ad25fed 100644 (file)
--- a/libs/freetdm/src/ftdm_io.c
+++ b/libs/freetdm/src/ftdm_io.c
@@ -750,9 +750,26 @@ FT_DECLARE(ftdm_status_t) ftdm_span_add_channel(ftdm_span_t *span, ftdm_socket_t
                ftdm_channel_t *new_chan = span->channels[++span->chan_count];
 
                if (!new_chan) {
+#ifdef FTDM_DEBUG_CHAN_MEMORY
+                       void *chanmem = NULL;
+                       int pages = 1;
+                       int pagesize = sysconf(_SC_PAGE_SIZE);
+                       if (sizeof(*new_chan) > pagesize) {
+                               pages = sizeof(*new_chan)/pagesize;
+                               pages++;
+                       }
+                       ftdm_log(FTDM_LOG_DEBUG, "Allocating %d pages of %d bytes for channel of size %d\n", pages, pagesize, sizeof(*new_chan));
+                       if (posix_memalign(&chanmem, pagesize, pagesize*pages)) {
+                               return FTDM_FAIL;
+                       }
+                       ftdm_log(FTDM_LOG_DEBUG, "Channel pages allocated start at mem %p\n", chanmem);
+                       memset(chanmem, 0, sizeof(*new_chan));
+                       new_chan = chanmem;
+#else
                        if (!(new_chan = ftdm_calloc(1, sizeof(*new_chan)))) {
                                return FTDM_FAIL;
                        }
+#endif
                        span->channels[span->chan_count] = new_chan;
                }