replace "assert" with "return" if FILE pointer is NULL in memlogging.c

runtime/include/sandbox_functions.h

@@ -203,6 +203,9 @@ sandbox_mem_print_perf(struct sandbox *sandbox)
 #ifndef LOG_RUNTIME_MEM_LOG
 	return;
 #endif
+	/* If the log was not defined by an environment variable, early out */
+        if (runtime_sandbox_perf_log == NULL) return;
+
 	uint32_t total_time_us = sandbox->total_time / runtime_processor_speed_MHz;
         uint32_t queued_us     = (sandbox->allocation_timestamp - sandbox->enqueue_timestamp)
                              / runtime_processor_speed_MHz;

runtime/src/memlogging.c

@@ -26,10 +26,6 @@ mem_log_init2(uint32_t log_size, FILE* file)
 
         log_obj.offset          = 0;
         log_obj.fout            = file;
-        if (!log_obj.fout) {
-                panic("failed to open log file:%s\n", strerror(errno));
-        }
-
 }
 
 /**
@@ -51,11 +47,7 @@ mem_log_init(uint32_t log_size, char const* file)
 	}
 
 	log_obj.offset		= 0;
-	log_obj.fout		= fopen(file, "a+");
+	log_obj.fout		= fopen(file, "w");
-	if (!log_obj.fout) {
-		panic("failed to open log file:%s\n", strerror(errno));
-	}
-
 }
 
 /**
@@ -68,7 +60,9 @@ mem_log(char const * fmt, ...)
 	return;
 #endif
 	assert(log_obj.logger);
-	assert(log_obj.fout);
+	if (!log_obj.fout) {
+		return;
+	}
 
 	va_list va;
 	va_start(va, fmt);
@@ -112,8 +106,11 @@ dump_log_to_file()
 #ifndef LOG_RUNTIME_MEM_LOG
 	return;
 #endif
+	if (!log_obj.fout) {
+                return;
+        }
+
         assert(log_obj.logger);
-	assert(log_obj.fout);
 
 	uint32_t write_bytes = 0;
 	while(write_bytes != log_obj.offset) {

runtime/tests/debug.sh

@@ -8,11 +8,13 @@ declare project_path="$(
 	cd "$(dirname "$1")/../.."
 	pwd
 )"
+path=`pwd`
 echo $project_path
 cd $project_path/runtime/bin
+export SLEDGE_DISABLE_PREEMPTION=true
 export LD_LIBRARY_PATH="$(pwd):$LD_LIBRARY_PATH"
 gdb --eval-command="handle SIGUSR1 nostop" \
 	--eval-command="set pagination off" \
 	--eval-command="set substitute-path /sledge/runtime $project_path/runtime" \
-	--eval-command="run ../tests/my_fibonacci.json" \
+#	--eval-command="run ../tests/test_armcifar10.json" \
 	./sledgert