From: Xiaoguang Sun <sun.xiaoguang@yoyosys.com>
Date: Tue, 25 Jun 2013 12:41:01 +0000 (+0800)
Subject: Implement getrusage
X-Git-Tag: v3.3.0~898
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=refs%2Fchanges%2F69%2F669%2F2;p=minix.git

Implement getrusage

Implement getrusage.
These fields of struct rusage are not supported and always set to zero at this time
long ru_nswap;           /* swaps */
long ru_inblock;         /* block input operations */
long ru_oublock;         /* block output operations */
long ru_msgsnd;          /* messages sent */
long ru_msgrcv;          /* messages received */
long ru_nvcsw;           /* voluntary context switches */
long ru_nivcsw;          /* involuntary context switches */

test75.c is the unit test for this new function

Change-Id: I3f1eb69de1fce90d087d76773b09021fc6106539
---

diff --git a/distrib/sets/lists/minix/mi b/distrib/sets/lists/minix/mi
index ce34f47dc..8701b038d 100644
--- a/distrib/sets/lists/minix/mi
+++ b/distrib/sets/lists/minix/mi
@@ -1508,6 +1508,7 @@
 ./usr/man/man2/getpeername.2		minix-sys
 ./usr/man/man2/getpid.2			minix-sys
 ./usr/man/man2/getpriority.2		minix-sys
+./usr/man/man2/getrusage.2		minix-sys
 ./usr/man/man2/getsockname.2		minix-sys
 ./usr/man/man2/getsockopt.2		minix-sys
 ./usr/man/man2/gettimeofday.2		minix-sys
@@ -4653,6 +4654,7 @@
 ./usr/tests/minix-posix/test72		minix-sys
 ./usr/tests/minix-posix/test73		minix-sys
 ./usr/tests/minix-posix/test74		minix-sys
+./usr/tests/minix-posix/test75		minix-sys
 ./usr/tests/minix-posix/test7		minix-sys
 ./usr/tests/minix-posix/test8		minix-sys
 ./usr/tests/minix-posix/test9		minix-sys
diff --git a/include/minix/callnr.h b/include/minix/callnr.h
index 0ec74931b..629f04ec2 100644
--- a/include/minix/callnr.h
+++ b/include/minix/callnr.h
@@ -1,4 +1,4 @@
-#define NCALLS		 118	/* number of system calls allowed */
+#define NCALLS		 124	/* number of system calls allowed */
 
 /* In case it isn't obvious enough: this list is sorted numerically. */
 #define EXIT		   1 
@@ -113,3 +113,4 @@
 				 * really a standalone call.
 				 */
 #define MAPDRIVER      122     /* to VFS, map a device */
+#define GETRUSAGE      123	/* to PM, VFS */
diff --git a/include/minix/com.h b/include/minix/com.h
index 08496d220..59bab8112 100644
--- a/include/minix/com.h
+++ b/include/minix/com.h
@@ -473,6 +473,7 @@
 #   define GET_IDLETSC	  21	/* get cumulative idle time stamp counter */
 #   define GET_CPUINFO    23    /* get information about cpus */
 #   define GET_REGS	  24	/* get general process registers */
+#   define GET_RUSAGE	  25	/* get resource usage */
 #define I_ENDPT        m7_i4	/* calling process (may only be SELF) */
 #define I_VAL_PTR      m7_p1	/* virtual address at caller */ 
 #define I_VAL_LEN      m7_i1	/* max length of value */
@@ -1078,8 +1079,10 @@
 
 #define VM_VFS_MMAP             (VM_RQ_BASE+46)
 
+#define VM_GETRUSAGE		(VM_RQ_BASE+47)
+
 /* Total. */
-#define NR_VM_CALLS				47
+#define NR_VM_CALLS				48
 #define VM_CALL_MASK_SIZE			BITMAP_CHUNKS(NR_VM_CALLS)
 
 /* not handled as a normal VM call, thus at the end of the reserved rage */
@@ -1294,4 +1297,9 @@
 #  define BDEV_NOFLAGS		0x00	/* no flags are set */
 #  define BDEV_FORCEWRITE	0x01	/* force write to disk immediately */
 
+/* Field names for GETRUSAGE related calls */
+#define RU_ENDPT	m1_i1	/* indicates a process for sys_getrusage */
+#define RU_WHO		m1_i1	/* who argument in getrusage call */
+#define RU_RUSAGE_ADDR	m1_p1	/* pointer to struct rusage */
+
 /* _MINIX_COM_H */
diff --git a/include/minix/syslib.h b/include/minix/syslib.h
index a5fcefc6f..863790091 100644
--- a/include/minix/syslib.h
+++ b/include/minix/syslib.h
@@ -17,6 +17,7 @@
 /* Forward declaration */
 struct reg86u;
 struct rs_pci;
+struct rusage;
 
 #define SYSTASK SYSTEM
 
@@ -178,6 +179,7 @@ int send_taskreply(endpoint_t who, endpoint_t endpoint, int status);
 #define sys_getpriv(dst, nr)	sys_getinfo(GET_PRIV, dst, 0,0, nr)
 #define sys_getidletsc(dst)	sys_getinfo(GET_IDLETSC, dst, 0,0,0)
 #define sys_getregs(dst,nr)	sys_getinfo(GET_REGS, dst, 0,0, nr)
+#define sys_getrusage(dst, nr)  sys_getinfo(GET_RUSAGE, dst, 0,0, nr)
 int sys_getinfo(int request, void *val_ptr, int val_len, void *val_ptr2,
 	int val_len2);
 int sys_whoami(endpoint_t *ep, char *name, int namelen, int
diff --git a/kernel/proc.c b/kernel/proc.c
index 6dcaf9125..140ac4724 100644
--- a/kernel/proc.c
+++ b/kernel/proc.c
@@ -1906,3 +1906,8 @@ void ser_dump_proc()
                 print_proc_recursive(pp);
         }
 }
+
+void increase_proc_signals(struct proc *p)
+{
+	p->p_signal_received++;
+}
diff --git a/kernel/proc.h b/kernel/proc.h
index 439396937..2f749b5c7 100644
--- a/kernel/proc.h
+++ b/kernel/proc.h
@@ -126,6 +126,8 @@ struct proc {
    */
   struct { reg_t r1, r2, r3; } p_defer;
 
+  u64_t p_signal_received;
+
 #if DEBUG_TRACE
   int p_schedules;
 #endif
diff --git a/kernel/proto.h b/kernel/proto.h
index 7952922dd..ed382c7b9 100644
--- a/kernel/proto.h
+++ b/kernel/proto.h
@@ -76,6 +76,7 @@ int isokendpt_f(endpoint_t e, int *p, int f);
 #endif
 void proc_no_time(struct proc *p);
 void reset_proc_accounting(struct proc *p);
+void increase_proc_signals(struct proc *p);
 void flag_account(struct proc *p, int flag);
 int try_deliver_senda(struct proc *caller_ptr, asynmsg_t *table, size_t
 	size);
diff --git a/kernel/system.c b/kernel/system.c
index caafd9943..423b353b1 100644
--- a/kernel/system.c
+++ b/kernel/system.c
@@ -373,6 +373,7 @@ int send_sig(endpoint_t ep, int sig_nr)
   priv = priv(rp);
   if(!priv) return ENOENT;
   sigaddset(&priv->s_sig_pending, sig_nr);
+  increase_proc_signals(rp);
   mini_notify(proc_addr(SYSTEM), rp->p_endpoint);
 
   return OK;
@@ -434,6 +435,7 @@ int sig_nr;			/* signal to be sent */
   /* Check if the signal is already pending. Process it otherwise. */
   if (! sigismember(&rp->p_pending, sig_nr)) {
       sigaddset(&rp->p_pending, sig_nr);
+	increase_proc_signals(rp);
       if (! (RTS_ISSET(rp, RTS_SIGNALED))) {		/* other pending */
 	  RTS_SET(rp, RTS_SIGNALED | RTS_SIG_PENDING);
           if(OK != send_sig(sig_mgr, SIGKSIG))
diff --git a/kernel/system/do_fork.c b/kernel/system/do_fork.c
index f30927025..c58622102 100644
--- a/kernel/system/do_fork.c
+++ b/kernel/system/do_fork.c
@@ -90,6 +90,7 @@ int do_fork(struct proc * caller, message * m_ptr)
   make_zero64(rpc->p_cycles);
   make_zero64(rpc->p_kcall_cycles);
   make_zero64(rpc->p_kipc_cycles);
+  rpc->p_signal_received = 0;
 
   /* If the parent is a privileged process, take away the privileges from the 
    * child process and inhibit it from running by setting the NO_PRIV flag.
diff --git a/kernel/system/do_getinfo.c b/kernel/system/do_getinfo.c
index 19ab73c14..fef7ce5a4 100644
--- a/kernel/system/do_getinfo.c
+++ b/kernel/system/do_getinfo.c
@@ -17,6 +17,7 @@
 #if USE_GETINFO
 
 #include <minix/u64.h>
+#include <sys/resource.h>
 
 /*===========================================================================*
  *			        update_idle_time			     *
@@ -47,6 +48,7 @@ int do_getinfo(struct proc * caller, message * m_ptr)
   int nr_e, nr, r;
   int wipe_rnd_bin = -1;
   struct proc *p;
+  struct rusage r_usage;
 
   /* Set source address and length based on request type. */
   switch (m_ptr->I_REQUEST) {
@@ -180,6 +182,32 @@ int do_getinfo(struct proc * caller, message * m_ptr)
         src_vir = (vir_bytes) &idl->p_cycles;
         break;
     }
+    case GET_RUSAGE: {
+	struct proc *target = NULL;
+	int target_slot = 0;
+	u64_t usec;
+        nr_e = (m_ptr->I_VAL_LEN2_E == SELF) ?
+            caller->p_endpoint : m_ptr->I_VAL_LEN2_E;
+
+	if (!isokendpt(nr_e, &target_slot))
+		return EINVAL;
+
+	target = proc_addr(target_slot);
+	if (isemptyp(target))
+		return EINVAL;
+
+	length = sizeof(r_usage);
+	memset(&r_usage, 0, sizeof(r_usage));
+	usec = target->p_user_time * 1000000 / system_hz;
+	r_usage.ru_utime.tv_sec = usec / 1000000;
+	r_usage.ru_utime.tv_usec = usec % 100000;
+	usec = target->p_sys_time * 1000000 / system_hz;
+	r_usage.ru_stime.tv_sec = usec / 1000000;
+	r_usage.ru_stime.tv_usec = usec % 100000;
+	r_usage.ru_nsignals = target->p_signal_received;
+	src_vir = (vir_bytes) &r_usage;
+	break;
+    }
     default:
 	printf("do_getinfo: invalid request %d\n", m_ptr->I_REQUEST);
         return(EINVAL);
diff --git a/lib/libc/sys-minix/Makefile.inc b/lib/libc/sys-minix/Makefile.inc
index 98a208fab..890b66d87 100644
--- a/lib/libc/sys-minix/Makefile.inc
+++ b/lib/libc/sys-minix/Makefile.inc
@@ -18,7 +18,8 @@ SRCS+= 	accept.c access.c adjtime.c bind.c brk.c sbrk.c m_closefrom.c getsid.c \
 	sigprocmask.c socket.c socketpair.c stat.c statvfs.c symlink.c \
 	sync.c syscall.c sysuname.c truncate.c umask.c unlink.c write.c \
 	utimensat.c utimes.c futimes.c lutimes.c futimens.c \
-	_exit.c _ucontext.c environ.c __getcwd.c vfork.c sizeup.c init.c
+	_exit.c _ucontext.c environ.c __getcwd.c vfork.c sizeup.c init.c \
+	getrusage.c
 
 # Minix specific syscalls.
 SRCS+= cprofile.c lseek64.c sprofile.c _mcontext.c
diff --git a/lib/libc/sys-minix/getrusage.c b/lib/libc/sys-minix/getrusage.c
new file mode 100644
index 000000000..271eb241b
--- /dev/null
+++ b/lib/libc/sys-minix/getrusage.c
@@ -0,0 +1,32 @@
+#include <sys/cdefs.h>
+#include "namespace.h"
+#include <lib.h>
+
+#include <unistd.h>
+#include <sys/resource.h>
+
+int getrusage(int who, struct rusage *r_usage)
+{
+	int rc;
+	message m;
+	m.RU_WHO = who;
+	m.RU_RUSAGE_ADDR = r_usage;
+
+	if (r_usage == NULL) {
+		errno = EFAULT;
+		return -1;
+	}
+	if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	memset(r_usage, 0, sizeof(struct rusage));
+	if ((rc = _syscall(PM_PROC_NR, GETRUSAGE, &m)) < 0)
+		return rc;
+	m.RU_RUSAGE_ADDR = r_usage;
+	if ((rc = _syscall(VFS_PROC_NR, GETRUSAGE, &m)) < 0)
+		return rc;
+	m.RU_RUSAGE_ADDR = r_usage;
+	return _syscall(VM_PROC_NR, VM_GETRUSAGE, &m);
+}
diff --git a/lib/libc/sys/Makefile.inc b/lib/libc/sys/Makefile.inc
index b20b7ea66..2fa88dfd5 100644
--- a/lib/libc/sys/Makefile.inc
+++ b/lib/libc/sys/Makefile.inc
@@ -228,7 +228,7 @@ MAN+=	accept.2 access.2 acct.2 bind.2 brk.2 chdir.2 \
 	flock.2 fork.2 fsync.2 getcontext.2 getdents.2 \
 	getfh.2 getvfsstat.2 getgid.2 getgroups.2 \
 	getitimer.2 getlogin.2 getpeername.2 getpgrp.2 getpid.2 \
-	getpriority.2 getrlimit.2 getrusage.2 getsid.2 getsockname.2 \
+	getpriority.2 getrlimit.2 getsid.2 getsockname.2 \
 	getsockopt.2 gettimeofday.2 getuid.2 intro.2 ioctl.2 issetugid.2 \
 	kill.2 kqueue.2 ktrace.2 \
 	lfs_bmapv.2 lfs_markv.2 lfs_segclean.2 lfs_segwait.2 \
@@ -244,7 +244,7 @@ MAN+=	accept.2 access.2 acct.2 bind.2 brk.2 chdir.2 \
 	mprotect.2 mremap.2 msgctl.2 msgget.2 msgrcv.2 msgsnd.2 msync.2 \
 	munmap.2 nanosleep.2 nfssvc.2 ntp_adjtime.2 open.2 pathconf.2 pipe.2 
 .else
-MAN+=	adjtime.2 clock_settime.2 pipe.2 
+MAN+=	adjtime.2 clock_settime.2 pipe.2 getrusage.2
 .endif # !defined(__MINIX)
 .if !defined(__MINIX)
 MAN+=	pmc_control.2 poll.2 posix_fadvise.2 profil.2 ptrace.2 __quotactl.2 \
diff --git a/lib/libexec/exec_elf.c b/lib/libexec/exec_elf.c
index 06c1bfd7d..131f6deb2 100644
--- a/lib/libexec/exec_elf.c
+++ b/lib/libexec/exec_elf.c
@@ -228,6 +228,11 @@ int libexec_load_elf(struct exec_info *execi)
 		if(first || startv > vaddr) startv = vaddr;
 		first = 0;
 
+		if ((ph->p_flags & PF_X) != 0 && execi->text_size < seg_membytes)
+			execi->text_size = seg_membytes;
+		else
+			execi->data_size = seg_membytes;
+
 		if(try_mmap && execi->memmap(execi, vaddr, fbytes, foffset, clearend, mmap_prot) == OK) {
 #if ELF_DEBUG
 			printf("libexec: mmap 0x%lx-0x%lx done, clearend 0x%x\n",
diff --git a/lib/libexec/libexec.h b/lib/libexec/libexec.h
index 8597e74c3..b9a8fe15f 100644
--- a/lib/libexec/libexec.h
+++ b/lib/libexec/libexec.h
@@ -32,6 +32,8 @@ struct exec_info {
     int allow_setuid;                   /* Allow set{u,g}id execution? */
     vir_bytes stack_size;		/* Desired stack size */
     vir_bytes load_offset;		/* Desired load offset */
+    vir_bytes text_size;		/* Text segment size */
+    vir_bytes data_size;		/* Data segment size */
     off_t filesize;			/* How big is the file */
 
     /* Callback pointers for use by libexec */
diff --git a/servers/pm/misc.c b/servers/pm/misc.c
index c3a198b39..0576a5513 100644
--- a/servers/pm/misc.c
+++ b/servers/pm/misc.c
@@ -492,3 +492,31 @@ void *brk_addr;
 	_brksize = brk_addr;
 	return 0;
 }
+
+/*===========================================================================*
+ *				do_getrusage				     *
+ *===========================================================================*/
+int do_getrusage()
+{
+	int res = 0;
+	clock_t user_time = 0;
+	clock_t sys_time = 0;
+	struct rusage r_usage;
+	u64_t usec;
+	if (m_in.RU_WHO != RUSAGE_SELF && m_in.RU_WHO != RUSAGE_CHILDREN)
+		return EINVAL;
+	if ((res = sys_getrusage(&r_usage, who_e)) < 0)
+		return res;
+
+	if (m_in.RU_WHO == RUSAGE_CHILDREN) {
+		usec = mp->mp_child_utime * 1000000 / sys_hz();
+		r_usage.ru_utime.tv_sec = usec / 1000000;
+		r_usage.ru_utime.tv_usec = usec % 1000000;
+		usec = mp->mp_child_stime * 1000000 / sys_hz();
+		r_usage.ru_stime.tv_sec = usec / 1000000;
+		r_usage.ru_stime.tv_usec = usec % 1000000;
+	}
+
+	return sys_datacopy(SELF, &r_usage, who_e,
+		(vir_bytes) m_in.RU_RUSAGE_ADDR, (vir_bytes) sizeof(r_usage));
+}
diff --git a/servers/pm/proto.h b/servers/pm/proto.h
index 73e8a4a69..0dc30709f 100644
--- a/servers/pm/proto.h
+++ b/servers/pm/proto.h
@@ -56,6 +56,7 @@ int do_getepinfo(void);
 int do_getepinfo_o(void);
 int do_svrctl(void);
 int do_getsetpriority(void);
+int do_getrusage(void);
 
 /* schedule.c */
 void sched_init(void);
diff --git a/servers/pm/table.c b/servers/pm/table.c
index d1c2075a1..b9007553b 100644
--- a/servers/pm/table.c
+++ b/servers/pm/table.c
@@ -129,6 +129,12 @@ int (*call_vec[])(void) = {
 	do_gettime,	/* 115 = clock_gettime */
 	do_settime,	/* 116 = clock_settime */
 	no_sys,		/* 117 = (vmcall) */
+	no_sys,		/* 118 = unsused */
+	no_sys,		/* 119 = unsused */
+	no_sys,		/* 120 = unsused */
+	no_sys,		/* 121 = (task reply) */
+	no_sys,		/* 122 = (map driver ) */
+	do_getrusage,	/* 123 = getrusage */
 };
 /* This should not fail with "array size is negative": */
 extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];
diff --git a/servers/vfs/exec.c b/servers/vfs/exec.c
index 8a58a77ee..c0bbe58ae 100644
--- a/servers/vfs/exec.c
+++ b/servers/vfs/exec.c
@@ -253,6 +253,8 @@ int pm_exec(endpoint_t proc_e, vir_bytes path, size_t path_len,
 
   okendpt(proc_e, &slot);
   rfp = fp = &fproc[slot];
+  rfp->text_size = 0;
+  rfp->data_size = 0;
 
   lookup_init(&resolve, fullpath, PATH_NOFLAGS, &execi.vmp, &execi.vp);
 
@@ -409,6 +411,8 @@ int pm_exec(endpoint_t proc_e, vir_bytes path, size_t path_len,
 
   /* Remember the new name of the process */
   strlcpy(rfp->fp_name, execi.args.progname, PROC_NAME_LEN);
+  rfp->text_size = execi.args.text_size;
+  rfp->data_size = execi.args.data_size;
 
 pm_execfinal:
   if(newfilp) unlock_filp(newfilp);
diff --git a/servers/vfs/fproc.h b/servers/vfs/fproc.h
index 9ef7acbd0..3f9ff28e9 100644
--- a/servers/vfs/fproc.h
+++ b/servers/vfs/fproc.h
@@ -50,6 +50,9 @@ EXTERN struct fproc {
   int fp_vp_rdlocks;		/* number of read-only locks on vnodes */
   int fp_vmnt_rdlocks;		/* number of read-only locks on vmnts */
 #endif
+
+  vir_bytes text_size;		/* text segment size of current process */
+  vir_bytes data_size;		/* data segment size of current process */
 } fproc[NR_PROCS];
 
 /* fp_flags */
diff --git a/servers/vfs/misc.c b/servers/vfs/misc.c
index 6d9a7269e..7f8dede77 100644
--- a/servers/vfs/misc.c
+++ b/servers/vfs/misc.c
@@ -30,6 +30,7 @@
 #include <minix/u64.h>
 #include <sys/ptrace.h>
 #include <sys/svrctl.h>
+#include <sys/resource.h>
 #include "file.h"
 #include "fproc.h"
 #include "scratchpad.h"
@@ -939,3 +940,24 @@ void panic_hook(void)
   mthread_stacktraces(); 
 }         
 
+/*===========================================================================*
+ *				do_getrusage				     *
+ *===========================================================================*/
+int do_getrusage(message *UNUSED(m_out))
+{
+	int res;
+	struct rusage r_usage;
+
+	if ((res = sys_datacopy(who_e, (vir_bytes) m_in.RU_RUSAGE_ADDR, SELF,
+		(vir_bytes) &r_usage, (vir_bytes) sizeof(r_usage))) < 0)
+		return res;
+
+	r_usage.ru_inblock = 0;
+	r_usage.ru_oublock = 0;
+	r_usage.ru_ixrss = fp->text_size;
+	r_usage.ru_idrss = fp->data_size;
+	r_usage.ru_isrss = DEFAULT_STACK_LIMIT;
+
+	return sys_datacopy(SELF, (vir_bytes) &r_usage, who_e,
+		(vir_bytes) m_in.RU_RUSAGE_ADDR, (phys_bytes) sizeof(r_usage));
+}
diff --git a/servers/vfs/proto.h b/servers/vfs/proto.h
index 339949042..6a048c25d 100644
--- a/servers/vfs/proto.h
+++ b/servers/vfs/proto.h
@@ -147,6 +147,7 @@ int do_vm_call(message *m_out);
 int pm_dumpcore(endpoint_t proc_e, int sig, vir_bytes exe_name);
 void * ds_event(void *arg);
 int dupvm(struct fproc *fp, int pfd, int *vmfd, struct filp **f);
+int do_getrusage(message *m_out);
 
 /* mount.c */
 int do_fsready(message *m_out);
diff --git a/servers/vfs/table.c b/servers/vfs/table.c
index 6aa4f734b..586c055d5 100644
--- a/servers/vfs/table.c
+++ b/servers/vfs/table.c
@@ -133,6 +133,12 @@ int (*call_vec[])(message *m_out) = {
 	no_sys,		/* 115 = (clock_gettime) */
 	no_sys,		/* 116 = (clock_settime) */
 	do_vm_call,	/* 117 = call from vm */
+	no_sys,		/* 118 = unsused */
+	no_sys,		/* 119 = unsused */
+	no_sys,		/* 120 = unsused */
+	no_sys,		/* 121 = (task reply) */
+	no_sys,		/* 122 = (map driver ) */
+	do_getrusage,	/* 123 = getrusage */
 };
 /* This should not fail with "array size is negative": */
 extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];
diff --git a/servers/vm/exit.c b/servers/vm/exit.c
index f287b327a..11cfcc94b 100644
--- a/servers/vm/exit.c
+++ b/servers/vm/exit.c
@@ -24,6 +24,14 @@
 #include "util.h"
 #include "sanitycheck.h"
 
+static void reset_vm_rusage(struct vmproc *vmp)
+{
+	vmp->vm_total = 0;
+	vmp->vm_total_max = 0;
+	vmp->vm_minor_page_fault = 0;
+	vmp->vm_major_page_fault = 0;
+}
+
 void free_proc(struct vmproc *vmp)
 {
 	map_free_proc(vmp);
@@ -33,6 +41,7 @@ void free_proc(struct vmproc *vmp)
 	vmp->vm_bytecopies = 0;
 #endif
 	vmp->vm_region_top = 0;
+	reset_vm_rusage(vmp);
 }
 
 void clear_proc(struct vmproc *vmp)
@@ -43,6 +52,7 @@ void clear_proc(struct vmproc *vmp)
 	vmp->vm_bytecopies = 0;
 #endif
 	vmp->vm_region_top = 0;
+	reset_vm_rusage(vmp);
 }
 
 /*===========================================================================*
diff --git a/servers/vm/main.c b/servers/vm/main.c
index 3f494033a..95e64486d 100644
--- a/servers/vm/main.c
+++ b/servers/vm/main.c
@@ -443,6 +443,9 @@ void init_vm(void)
 	CALLMAP(VM_MAPCACHEPAGE, do_mapcache);
 	CALLMAP(VM_SETCACHEPAGE, do_setcache);
 
+	/* getrusage */
+	CALLMAP(VM_GETRUSAGE, do_getrusage);
+
 	/* Initialize the structures for queryexit */
 	init_query_exit();
 
diff --git a/servers/vm/mem_anon.c b/servers/vm/mem_anon.c
index 9adc52419..5158f882d 100644
--- a/servers/vm/mem_anon.c
+++ b/servers/vm/mem_anon.c
@@ -22,7 +22,8 @@ static void anon_split(struct vmproc *vmp, struct vir_region *vr,
 static int anon_lowshrink(struct vir_region *vr, vir_bytes len);
 static int anon_unreference(struct phys_region *pr);
 static int anon_pagefault(struct vmproc *vmp, struct vir_region *region, 
-	struct phys_region *ph, int write, vfs_callback_t cb, void *, int);
+	struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+	int len, int *io);
 static int anon_sanitycheck(struct phys_region *pr, char *file, int line);
 static int anon_writable(struct phys_region *pr);
 static int anon_resize(struct vmproc *vmp, struct vir_region *vr, vir_bytes l);
@@ -51,7 +52,8 @@ static int anon_unreference(struct phys_region *pr)
 }
 
 static int anon_pagefault(struct vmproc *vmp, struct vir_region *region,
-	struct phys_region *ph, int write, vfs_callback_t cb, void *st, int l)
+	struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+	int len, int *io)
 {
 	phys_bytes new_page, new_page_cl;
 	u32_t allocflags;
diff --git a/servers/vm/mem_anon_contig.c b/servers/vm/mem_anon_contig.c
index 1f2750d18..127ee4cfa 100644
--- a/servers/vm/mem_anon_contig.c
+++ b/servers/vm/mem_anon_contig.c
@@ -11,7 +11,8 @@
 static int anon_contig_reference(struct phys_region *, struct phys_region *);
 static int anon_contig_unreference(struct phys_region *pr);
 static int anon_contig_pagefault(struct vmproc *vmp, struct vir_region *region, 
-	struct phys_region *ph, int write, vfs_callback_t cb, void *st, int);
+	struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+	int len, int *io);
 static int anon_contig_sanitycheck(struct phys_region *pr, char *file, int line);
 static int anon_contig_writable(struct phys_region *pr);
 static int anon_contig_resize(struct vmproc *vmp, struct vir_region *vr, vir_bytes l);
@@ -29,7 +30,8 @@ struct mem_type mem_type_anon_contig = {
 };
 
 static int anon_contig_pagefault(struct vmproc *vmp, struct vir_region *region,
-	struct phys_region *ph, int write, vfs_callback_t cb, void *s, int l)
+	struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+	int len, int *io)
 {
 	panic("anon_contig_pagefault: pagefault cannot happen");
 }
diff --git a/servers/vm/mem_cache.c b/servers/vm/mem_cache.c
index 7bc0bc24e..39f9495d5 100644
--- a/servers/vm/mem_cache.c
+++ b/servers/vm/mem_cache.c
@@ -29,7 +29,8 @@ static int cache_sanitycheck(struct phys_region *pr, char *file, int line);
 static int cache_writable(struct phys_region *pr);
 static int cache_resize(struct vmproc *vmp, struct vir_region *vr, vir_bytes l);
 static int cache_pagefault(struct vmproc *vmp, struct vir_region *region, 
-        struct phys_region *ph, int write, vfs_callback_t cb, void *, int);
+        struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+	int len, int *io);
 
 struct mem_type mem_type_cache = {
 	.name = "cache memory",
@@ -81,6 +82,7 @@ do_mapcache(message *msg)
 	struct vir_region *vr;
 	struct vmproc *caller;
 	vir_bytes offset;
+	int io = 0;
 
 	if(vm_isokendpt(msg->m_source, &n) != OK) panic("bogus source");
 	caller = &vmproc[n];
@@ -113,7 +115,7 @@ do_mapcache(message *msg)
 		assert(vr->length == bytes);
 		assert(offset < vr->length);
 
-		if(map_pf(caller, vr, offset, 1, NULL, NULL, 0) != OK) {
+		if(map_pf(caller, vr, offset, 1, NULL, NULL, 0, &io) != OK) {
 			map_unmap_region(caller, vr, 0, bytes);
 			printf("VM: map_pf failed\n");
 			return ENOMEM;
@@ -136,7 +138,7 @@ do_mapcache(message *msg)
 
 static int cache_pagefault(struct vmproc *vmp, struct vir_region *region, 
         struct phys_region *ph, int write, vfs_callback_t cb,
-	void *state, int len)
+	void *state, int len, int *io)
 {
 	vir_bytes offset = ph->offset;
 	assert(ph->ph->phys == MAP_NONE);
diff --git a/servers/vm/mem_directphys.c b/servers/vm/mem_directphys.c
index 740c6e488..306384975 100644
--- a/servers/vm/mem_directphys.c
+++ b/servers/vm/mem_directphys.c
@@ -17,7 +17,8 @@
 static int phys_unreference(struct phys_region *pr);
 static int phys_writable(struct phys_region *pr);
 static int phys_pagefault(struct vmproc *vmp, struct vir_region *region,
-        struct phys_region *ph, int write, vfs_callback_t cb, void *, int);
+        struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+	int len, int *io);
 static int phys_copy(struct vir_region *vr, struct vir_region *newvr);
 
 struct mem_type mem_type_directphys = {
@@ -34,7 +35,8 @@ static int phys_unreference(struct phys_region *pr)
 }
 
 static int phys_pagefault(struct vmproc *vmp, struct vir_region *region,
-    struct phys_region *ph, int write, vfs_callback_t cb, void *st, int len)
+    struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+    int len, int *io)
 {
 	phys_bytes arg = region->param.phys, phmem;
 	assert(arg != MAP_NONE);
diff --git a/servers/vm/mem_file.c b/servers/vm/mem_file.c
index 93b546225..9fc51140d 100644
--- a/servers/vm/mem_file.c
+++ b/servers/vm/mem_file.c
@@ -18,7 +18,8 @@ static void mappedfile_split(struct vmproc *vmp, struct vir_region *vr,
 	struct vir_region *r1, struct vir_region *r2);
 static int mappedfile_unreference(struct phys_region *pr);
 static int mappedfile_pagefault(struct vmproc *vmp, struct vir_region *region, 
-       struct phys_region *ph, int write, vfs_callback_t callback, void *, int);
+       struct phys_region *ph, int write, vfs_callback_t callback, void *state,
+       int len, int *io);
 static int mappedfile_sanitycheck(struct phys_region *pr, char *file, int line);
 static int mappedfile_writable(struct phys_region *pr);
 static int mappedfile_copy(struct vir_region *vr, struct vir_region *newvr);
@@ -72,7 +73,7 @@ static int cow_block(struct vmproc *vmp, struct vir_region *region,
 
 static int mappedfile_pagefault(struct vmproc *vmp, struct vir_region *region,
 	struct phys_region *ph, int write, vfs_callback_t cb,
-	void *state, int statelen)
+	void *state, int statelen, int *io)
 {
 	u32_t allocflags;
 	int procfd = region->param.file.fdref->fd;
@@ -123,7 +124,7 @@ static int mappedfile_pagefault(struct vmproc *vmp, struct vir_region *region,
 			printf("VM: mappedfile_pagefault: vfs_request failed\n");
 			return ENOMEM;
 		}
-
+		*io = 1;
 		return SUSPEND;
 	}
 
diff --git a/servers/vm/mem_shared.c b/servers/vm/mem_shared.c
index b7fdd4944..7a0f95fc1 100644
--- a/servers/vm/mem_shared.c
+++ b/servers/vm/mem_shared.c
@@ -15,7 +15,8 @@
 
 static int shared_unreference(struct phys_region *pr);
 static int shared_pagefault(struct vmproc *vmp, struct vir_region *region, 
-	struct phys_region *ph, int write, vfs_callback_t cb, void *, int);
+	struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+	int len, int *io);
 static int shared_sanitycheck(struct phys_region *pr, char *file, int line);
 static int shared_writable(struct phys_region *pr);
 static void shared_delete(struct vir_region *region);
@@ -110,7 +111,7 @@ static void shared_delete(struct vir_region *region)
 
 static int shared_pagefault(struct vmproc *vmp, struct vir_region *region,
 	struct phys_region *ph, int write, vfs_callback_t cb,
-	void *state, int statelen)
+	void *state, int statelen, int *io)
 {
 	struct vir_region *src_region;
 	struct vmproc *src_vmp;
@@ -126,7 +127,7 @@ static int shared_pagefault(struct vmproc *vmp, struct vir_region *region,
 	if(!(pr = physblock_get(src_region, ph->offset))) {
 		int r;
 		if((r=map_pf(src_vmp, src_region, ph->offset, write,
-			NULL, NULL, 0)) != OK)
+			NULL, NULL, 0, io)) != OK)
 			return r;
 		if(!(pr = physblock_get(src_region, ph->offset))) {
 			panic("missing region after pagefault handling");
diff --git a/servers/vm/memtype.h b/servers/vm/memtype.h
index 7ff4ce9c6..f5ff38f00 100644
--- a/servers/vm/memtype.h
+++ b/servers/vm/memtype.h
@@ -16,7 +16,8 @@ typedef struct mem_type {
 	int (*ev_reference)(struct phys_region *pr, struct phys_region *newpr);
 	int (*ev_unreference)(struct phys_region *pr);
 	int (*ev_pagefault)(struct vmproc *vmp, struct vir_region *region,
-	 struct phys_region *ph, int write, vfs_callback_t cb, void *, int);
+	 struct phys_region *ph, int write, vfs_callback_t cb, void *state,
+	 int len, int *io);
 	int (*ev_resize)(struct vmproc *vmp, struct vir_region *vr, vir_bytes len);
 	void (*ev_split)(struct vmproc *vmp, struct vir_region *vr,
 		struct vir_region *r1, struct vir_region *r2);
diff --git a/servers/vm/pagefaults.c b/servers/vm/pagefaults.c
index c945f4857..ede0ad0fa 100644
--- a/servers/vm/pagefaults.c
+++ b/servers/vm/pagefaults.c
@@ -70,6 +70,7 @@ static void handle_pagefault(endpoint_t ep, vir_bytes addr, u32_t err, int retry
 	struct vir_region *region;
 	vir_bytes offset;
 	int p, wr = PFERR_WRITE(err);
+	int io = 0;
 
 	if(vm_isokendpt(ep, &p) != OK)
 		panic("handle_pagefault: endpoint wrong: %d", ep);
@@ -111,7 +112,7 @@ static void handle_pagefault(endpoint_t ep, vir_bytes addr, u32_t err, int retry
 
 	/* Access is allowed; handle it. */
 	if(retry) {
-		result = map_pf(vmp, region, offset, wr, NULL, NULL, 0);
+		result = map_pf(vmp, region, offset, wr, NULL, NULL, 0, &io);
 		assert(result != SUSPEND);
 	} else {
 		struct pf_state state;
@@ -119,8 +120,12 @@ static void handle_pagefault(endpoint_t ep, vir_bytes addr, u32_t err, int retry
 		state.vaddr = addr;
 		state.err = err;
 		result = map_pf(vmp, region, offset, wr, pf_cont,
-			&state, sizeof(state));
+			&state, sizeof(state), &io);
 	}
+	if (io)
+		vmp->vm_major_page_fault++;
+	else
+		vmp->vm_minor_page_fault++;
 
 	if(result == SUSPEND) {
 		return;
diff --git a/servers/vm/proto.h b/servers/vm/proto.h
index f162045d2..5c98aa223 100644
--- a/servers/vm/proto.h
+++ b/servers/vm/proto.h
@@ -41,6 +41,7 @@ int get_stack_ptr(int proc_nr, vir_bytes *sp);
 int do_info(message *);
 int swap_proc_slot(struct vmproc *src_vmp, struct vmproc *dst_vmp);
 int swap_proc_dyn_data(struct vmproc *src_vmp, struct vmproc *dst_vmp);
+int do_getrusage(message *m);
 
 /* exit.c */
 void clear_proc(struct vmproc *vmp);
@@ -143,7 +144,8 @@ int map_proc_copy_from(struct vmproc *dst, struct vmproc *src, struct
 struct vir_region *map_lookup(struct vmproc *vmp, vir_bytes addr,
 	struct phys_region **pr);
 int map_pf(struct vmproc *vmp, struct vir_region *region, vir_bytes
-	offset, int write, vfs_callback_t pf_callback, void *state, int);
+	offset, int write, vfs_callback_t pf_callback, void *state, int len,
+	int *io);
 int map_pin_memory(struct vmproc *vmp);
 int map_handle_memory(struct vmproc *vmp, struct vir_region *region,
 	vir_bytes offset, vir_bytes len, int write, vfs_callback_t cb,
diff --git a/servers/vm/region.c b/servers/vm/region.c
index 500056b93..8499c0812 100644
--- a/servers/vm/region.c
+++ b/servers/vm/region.c
@@ -73,14 +73,21 @@ void physblock_set(struct vir_region *region, vir_bytes offset,
 	struct phys_region *newphysr)
 {
 	int i;
+	struct vmproc *proc;
 	assert(!(offset % VM_PAGE_SIZE));
 	assert(offset >= 0 && offset < region->length);
 	i = offset/VM_PAGE_SIZE;
+	proc = region->parent;
+	assert(proc);
 	if(newphysr) {
 		assert(!region->physblocks[i]);
 		assert(newphysr->offset == offset);
+		proc->vm_total += VM_PAGE_SIZE;
+		if (proc->vm_total > proc->vm_total_max)
+			proc->vm_total_max = proc->vm_total;
 	} else {
 		assert(region->physblocks[i]);
+		proc->vm_total -= VM_PAGE_SIZE;
 	}
 	region->physblocks[i] = newphysr;
 }
@@ -671,7 +678,7 @@ u32_t vrallocflags(u32_t flags)
 /*===========================================================================*
  *				map_pf			     *
  *===========================================================================*/
-int map_pf(vmp, region, offset, write, pf_callback, state, len)
+int map_pf(vmp, region, offset, write, pf_callback, state, len, io)
 struct vmproc *vmp;
 struct vir_region *region;
 vir_bytes offset;
@@ -679,6 +686,7 @@ int write;
 vfs_callback_t pf_callback;
 void *state;
 int len;
+int *io;
 {
 	struct phys_region *ph;
 	int r = OK;
@@ -725,7 +733,7 @@ int len;
 		assert(ph->ph);
 
 		if((r = ph->memtype->ev_pagefault(vmp,
-			region, ph, write, pf_callback, state, len)) == SUSPEND) {
+			region, ph, write, pf_callback, state, len, io)) == SUSPEND) {
 			return SUSPEND;
 		}
 
@@ -774,6 +782,7 @@ int statelen;
 {
 	vir_bytes offset, lim;
 	int r;
+	int io = 0;
 
 	assert(length > 0);
 	lim = start_offset + length;
@@ -781,7 +790,7 @@ int statelen;
 
 	for(offset = start_offset; offset < lim; offset += VM_PAGE_SIZE)
 		if((r = map_pf(vmp, region, offset, write,
-		   cb, state, statelen)) != OK)
+		   cb, state, statelen, &io)) != OK)
 			return r;
 
 	return OK;
diff --git a/servers/vm/utility.c b/servers/vm/utility.c
index 87aad1c35..eeb1fd9db 100644
--- a/servers/vm/utility.c
+++ b/servers/vm/utility.c
@@ -23,6 +23,7 @@
 #include <assert.h>
 #include <sys/param.h>
 #include <sys/mman.h>
+#include <sys/resource.h>
 
 #include "proto.h"
 #include "glo.h"
@@ -320,4 +321,27 @@ int _brk(void *addr)
 	return 0;
 }
 
+/*===========================================================================*
+ *				do_getrusage		     		     *
+ *===========================================================================*/
+int do_getrusage(message *m)
+{
+	int res, slot;
+	struct vmproc *vmp;
+	struct rusage r_usage;
+	if ((res = vm_isokendpt(m->m_source, &slot)) != OK)
+		return ESRCH;
 
+	vmp = &vmproc[slot];
+
+	if ((res = sys_datacopy(m->m_source, (vir_bytes) m->RU_RUSAGE_ADDR,
+		SELF, (vir_bytes) &r_usage, (vir_bytes) sizeof(r_usage))) < 0)
+		return res;
+
+	r_usage.ru_maxrss = vmp->vm_total_max;
+	r_usage.ru_minflt = vmp->vm_minor_page_fault;
+	r_usage.ru_majflt = vmp->vm_major_page_fault;
+
+	return sys_datacopy(SELF, &r_usage, m->m_source,
+		(vir_bytes) m->RU_RUSAGE_ADDR, (vir_bytes) sizeof(r_usage));
+}
diff --git a/servers/vm/vmproc.h b/servers/vm/vmproc.h
index 5e7145505..f8c6e430a 100644
--- a/servers/vm/vmproc.h
+++ b/servers/vm/vmproc.h
@@ -25,6 +25,10 @@ struct vmproc {
 #if VMSTATS
 	int vm_bytecopies;
 #endif
+	vir_bytes	vm_total;
+	vir_bytes	vm_total_max;
+	u64_t		vm_minor_page_fault;
+	u64_t		vm_major_page_fault;
 };
 
 /* Bits for vm_flags */
diff --git a/sys/sys/resource.h b/sys/sys/resource.h
index e6fb8aebd..97b31185f 100644
--- a/sys/sys/resource.h
+++ b/sys/sys/resource.h
@@ -47,6 +47,34 @@
 #define	PRIO_PGRP	1
 #define	PRIO_USER	2
 
+/*
+ * Resource utilization information.
+ */
+
+#define	RUSAGE_SELF	0
+#define	RUSAGE_CHILDREN	-1
+
+struct	rusage {
+	struct timeval ru_utime;	/* user time used */
+	struct timeval ru_stime;	/* system time used */
+	long	ru_maxrss;		/* max resident set size */
+#define	ru_first	ru_ixrss
+	long	ru_ixrss;		/* integral shared memory size */
+	long	ru_idrss;		/* integral unshared data " */
+	long	ru_isrss;		/* integral unshared stack " */
+	long	ru_minflt;		/* page reclaims */
+	long	ru_majflt;		/* page faults */
+	long	ru_nswap;		/* swaps */
+	long	ru_inblock;		/* block input operations */
+	long	ru_oublock;		/* block output operations */
+	long	ru_msgsnd;		/* messages sent */
+	long	ru_msgrcv;		/* messages received */
+	long	ru_nsignals;		/* signals received */
+	long	ru_nvcsw;		/* voluntary context switches */
+	long	ru_nivcsw;		/* involuntary " */
+#define	ru_last		ru_nivcsw
+};
+
 /*
  * Resource limits
  */
@@ -78,6 +106,7 @@ struct rlimit
 __BEGIN_DECLS
 int	getpriority(int, int);
 int	getrlimit(int, struct rlimit *);
+int	getrusage(int, struct rusage *);
 int	setpriority(int, int, int);
 __END_DECLS
 
diff --git a/test/Makefile b/test/Makefile
index 58a1f7add..af00c237b 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -49,7 +49,7 @@ MINIX_TESTS= \
  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 \
 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 \
 41 42 43 44 45 46    48 49 50    52 53 54 55 56    58 59 60 \
-61       64 65 66 67 68 69 70 71 72 73 74
+61       64 65 66 67 68 69 70 71 72 73 74 75
 
 .if ${MACHINE_ARCH} == "i386"
 MINIX_TESTS+= \
diff --git a/test/run b/test/run
index fa6d21376..ec0b821b0 100755
--- a/test/run
+++ b/test/run
@@ -24,7 +24,7 @@ setuids="test11 test33 test43 test44 test46 test56 test60 test61 test65 \
 alltests="   1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 \
          21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 \
          41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 \
-         61 62 63 64 65 66 67 68 69 70 71 72 \
+         61 62 63 64 65 66 67 68 69 70 71 72 75 \
 	 sh1.sh sh2.sh interp.sh"
 tests_no=`expr 0`
 
diff --git a/test/test75.c b/test/test75.c
new file mode 100644
index 000000000..288d2a98d
--- /dev/null
+++ b/test/test75.c
@@ -0,0 +1,114 @@
+/* Test 75 - getrusage functionality test.
+ */
+
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include "common.h"
+
+#define CHECK_ZERO_FIELD(rusage, field)		\
+	if (rusage.field != 0)			\
+		em(1, #field " must be zero");
+
+#define CHECK_NOT_ZERO_FIELD(rusage, field)	\
+	if (rusage.field == 0)			\
+		em(1, #field " can't be zero");
+
+#define CHECK_EQUAL_FIELD(rusage1, rusage2, field)		  \
+	if (rusage1.field != rusage2.field)			  \
+		em(1, #field " of " #rusage1 " doesn't equal to " \
+			#field " of " #rusage2);
+
+static void spin()
+{
+	struct timeval start_time;
+	struct timeval end_time;
+	int loop = 0;
+	if (gettimeofday(&start_time, NULL) == -1) {
+		e(1);
+		exit(1);
+	}
+	memset(&end_time, 0, sizeof(end_time));
+	while (start_time.tv_sec + 10 > end_time.tv_sec) {
+		if ((++loop % 10000) == 0) {
+			if (gettimeofday(&end_time, NULL) == -1) {
+				e(1);
+				exit(1);
+			}
+		}
+	}
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct rusage r_usage1;
+	struct rusage r_usage2;
+	struct rusage r_usage3;
+	pid_t child;
+	int status = 0;
+	start(75);
+	if ((getrusage(RUSAGE_SELF + 1, &r_usage1) != -1 || errno != EINVAL) ||
+		(getrusage(RUSAGE_CHILDREN - 1, &r_usage1) != -1 ||
+		 errno != EINVAL) || (getrusage(RUSAGE_SELF, NULL) != -1 ||
+		 errno != EFAULT)) {
+		e(1);
+		exit(1);
+	}
+	spin();
+	if (getrusage(RUSAGE_SELF, &r_usage1) != 0) {
+		e(1);
+		exit(1);
+	}
+	CHECK_NOT_ZERO_FIELD(r_usage1, ru_utime.tv_sec);
+	CHECK_NOT_ZERO_FIELD(r_usage1, ru_maxrss);
+	CHECK_NOT_ZERO_FIELD(r_usage1, ru_ixrss);
+	CHECK_NOT_ZERO_FIELD(r_usage1, ru_idrss);
+	CHECK_NOT_ZERO_FIELD(r_usage1, ru_isrss);
+	if (getrusage(RUSAGE_CHILDREN, &r_usage2) != 0) {
+		e(1);
+		exit(1);
+	}
+	CHECK_ZERO_FIELD(r_usage2, ru_utime.tv_sec);
+	CHECK_ZERO_FIELD(r_usage2, ru_utime.tv_usec);
+	CHECK_NOT_ZERO_FIELD(r_usage2, ru_maxrss);
+	CHECK_NOT_ZERO_FIELD(r_usage2, ru_ixrss);
+	CHECK_NOT_ZERO_FIELD(r_usage2, ru_idrss);
+	CHECK_NOT_ZERO_FIELD(r_usage2, ru_isrss);
+	CHECK_EQUAL_FIELD(r_usage1, r_usage2, ru_ixrss);
+	CHECK_EQUAL_FIELD(r_usage1, r_usage2, ru_idrss);
+	CHECK_EQUAL_FIELD(r_usage1, r_usage2, ru_isrss);
+	if ((child = fork()) != 0) {
+		if (child != waitpid(child, &status, 0)) {
+			e(1);
+			exit(1);
+		}
+		if (WEXITSTATUS(status) != 0) {
+			e(1);
+			exit(1);
+		}
+		if (getrusage(RUSAGE_CHILDREN, &r_usage3) != 0) {
+			e(1);
+			exit(1);
+		}
+		CHECK_NOT_ZERO_FIELD(r_usage3, ru_utime.tv_sec);
+		CHECK_NOT_ZERO_FIELD(r_usage3, ru_maxrss);
+		CHECK_NOT_ZERO_FIELD(r_usage3, ru_ixrss);
+		CHECK_NOT_ZERO_FIELD(r_usage3, ru_idrss);
+		CHECK_NOT_ZERO_FIELD(r_usage3, ru_isrss);
+		CHECK_EQUAL_FIELD(r_usage1, r_usage3, ru_ixrss);
+		CHECK_EQUAL_FIELD(r_usage1, r_usage3, ru_idrss);
+		CHECK_EQUAL_FIELD(r_usage1, r_usage3, ru_isrss);
+	} else {
+		spin();
+		exit(0);
+	}
+	quit();
+
+	return 0;
+}