config module: check that memory is enough, allow more restarts

A later commit implements the "restart" of the L1. The L1 reads
configuration options. First, allow to re-read configurations by
increasing the amount of memory the config module might allocate. Then,
avoid an out-of-bound write by checking that we still have memory
available (and assert if not possible).

common/config/config_common.c

@@ -108,6 +108,7 @@ void *config_allocate_new(configmodule_interface_t *cfg, int sz, bool autoFree)
   // add the memory piece in the managed memory pieces list
   pthread_mutex_lock(&cfg->memBlocks_mutex);
   int newBlockIdx=cfg->numptrs++;
+  AssertFatal(newBlockIdx < sizeofArray(cfg->oneBlock), "reached maximum number of dynamically allocatable blocks\n");
   oneBlock_t* tmp=&cfg->oneBlock[newBlockIdx];
   tmp->ptrs = (char *)ptr;
   tmp->ptrsAllocated = true;

common/config/config_load_configmodule.h

@@ -41,7 +41,7 @@
 #include "common/config/config_paramdesc.h"
 #include "common/utils/T/T.h"
 #define CONFIG_MAX_OOPT_PARAMS    10     // maximum number of parameters in the -O option (-O <cfgmode>:P1:P2...
-#define CONFIG_MAX_ALLOCATEDPTRS  2048   // maximum number of parameters that can be dynamicaly allocated in the config module
+#define CONFIG_MAX_ALLOCATEDPTRS  32768   // maximum number of parameters that can be dynamicaly allocated in the config module
 
 /* default values for configuration module parameters */
 #define CONFIG_LIBCONFIGFILE        "libconfig"  // use libconfig file