Fix stack overflow (ARMmbed#1718)

-Do not trace in interrupt context
-Update buffer size trace in case of allocation failure

Author: Arto Kinnunen

source/Core/buffer_dyn.c

@@ -110,7 +110,7 @@ buffer_t *buffer_get_specific(uint16_t headroom, uint16_t size, uint16_t minspac
 #endif
         buf->size = total_size;
     } else {
-        tr_error("buffer_get failed: alloc(%zd)", sizeof(buffer_t) + total_size);
+        tr_error("buffer_get failed: alloc(%d)", sizeof(buffer_t) + total_size);
     }
 
     protocol_stats_update(STATS_BUFFER_ALLOC, 1);

source/MAC/IEEE802_15_4/mac_pd_sap.c

@@ -18,7 +18,6 @@
 #include "ns_types.h"
 #include "eventOS_event.h"
 #include "string.h"
-#include "ns_trace.h"
 #include "nsdynmemLIB.h"
 #include "randLIB.h"
 #include "ccmLIB.h"
@@ -36,9 +35,6 @@
 #include "MAC/IEEE802_15_4/mac_mcps_sap.h"
 #include "MAC/rf_driver_storage.h"
 
-
-#define TRACE_GROUP "mPDs"
-
 /* Define TX Timeot Period */
 // Hardcoded to 1200ms. Should be changed dynamic: (FHSS) channel retries needs longer timeout
 #define NWKTX_TIMEOUT_PERIOD (1200*20)
@@ -336,7 +332,6 @@ int8_t mac_pd_sap_data_cb(void *identifier, arm_phy_sap_msg_t *message)
         mac_pre_parsed_frame_t *buffer = mcps_sap_pre_parsed_frame_buffer_get(pd_data_ind->data_ptr, pd_data_ind->data_len);
 
         if (!buffer) {
-            tr_error("pd_ind buffer get fail %u", pd_data_ind->data_len);
             sw_mac_stats_update(rf_ptr, STAT_MAC_RX_DROP, 0);
             return -3;
         }