support getrusage (work in progress)

kernel/include/process.h

@@ -439,6 +439,9 @@ struct process {
 	// cpu time (children)
 	struct timespec stime_children;
 	struct timespec utime_children;
+
+	long maxrss;
+	long maxrss_children;
 };
 
 void hold_thread(struct thread *ftn);
@@ -560,6 +563,8 @@ struct process_vm {
 
 	ihk_atomic_t refcount;
 	int exiting;
+
+	long currss;
 };
 
 

kernel/include/syscall.h

@@ -326,6 +326,29 @@ struct procfs_file {
 	char fname[PROCFS_NAME_MAX];	/* procfs filename (request) */
 };
 
+#define RUSAGE_SELF 0
+#define RUSAGE_CHILDREN -1
+#define RUSAGE_THREAD 1
+
+struct rusage {
+	struct timeval ru_utime;
+	struct timeval ru_stime;
+	long   ru_maxrss;
+	long   ru_ixrss;
+	long   ru_idrss;
+	long   ru_isrss;
+	long   ru_minflt;
+	long   ru_majflt;
+	long   ru_nswap;
+	long   ru_inblock;
+	long   ru_oublock;
+	long   ru_msgsnd;
+	long   ru_msgrcv;
+	long   ru_nsignals;
+	long   ru_nvcsw;
+	long   ru_nivcsw;
+};
+
 extern void terminate(int, int);
 
 struct tod_data_s {