1 files changed, 153 insertions, 0 deletions
diff --git a/user/sysinfotest.c b/user/sysinfotest.c
new file mode 100644
index 0000000..8a648a6
--- /dev/null
+++ b/user/sysinfotest.c
@@ -0,0 +1,153 @@
+#include "kernel/types.h"
+#include "kernel/riscv.h"
+#include "kernel/sysinfo.h"
+#include "user/user.h"
+
+
+void
+sinfo(struct sysinfo *info) {
+  if (sysinfo(info) < 0) {
+    printf("FAIL: sysinfo failed");
+    exit(1);
+  }
+}
+
+//
+// use sbrk() to count how many free physical memory pages there are.
+//
+int
+countfree()
+{
+  uint64 sz0 = (uint64)sbrk(0);
+  struct sysinfo info;
+  int n = 0;
+
+  while(1){
+    if((uint64)sbrk(PGSIZE) == 0xffffffffffffffff){
+      break;
+    }
+    n += PGSIZE;
+  }
+  sinfo(&info);
+  if (info.freemem != 0) {
+    printf("FAIL: there is no free mem, but sysinfo.freemem=%d\n",
+      info.freemem);
+    exit(1);
+  }
+  sbrk(-((uint64)sbrk(0) - sz0));
+  return n;
+}
+
+void
+testmem() {
+  struct sysinfo info;
+  uint64 n = countfree();
+  
+  sinfo(&info);
+
+  if (info.freemem!= n) {
+    printf("FAIL: free mem %d (bytes) instead of %d\n", info.freemem, n);
+    exit(1);
+  }
+  
+  if((uint64)sbrk(PGSIZE) == 0xffffffffffffffff){
+    printf("sbrk failed");
+    exit(1);
+  }
+
+  sinfo(&info);
+    
+  if (info.freemem != n-PGSIZE) {
+    printf("FAIL: free mem %d (bytes) instead of %d\n", n-PGSIZE, info.freemem);
+    exit(1);
+  }
+  
+  if((uint64)sbrk(-PGSIZE) == 0xffffffffffffffff){
+    printf("sbrk failed");
+    exit(1);
+  }
+
+  sinfo(&info);
+    
+  if (info.freemem != n) {
+    printf("FAIL: free mem %d (bytes) instead of %d\n", n, info.freemem);
+    exit(1);
+  }
+}
+
+void
+testcall() {
+  struct sysinfo info;
+  
+  if (sysinfo(&info) < 0) {
+    printf("FAIL: sysinfo failed\n");
+    exit(1);
+  }
+
+  if (sysinfo((struct sysinfo *) 0xeaeb0b5b00002f5e) !=  0xffffffffffffffff) {
+    printf("FAIL: sysinfo succeeded with bad argument\n");
+    exit(1);
+  }
+}
+
+void testproc() {
+  struct sysinfo info;
+  uint64 nproc;
+  int status;
+  int pid;
+  
+  sinfo(&info);
+  nproc = info.nproc;
+
+  pid = fork();
+  if(pid < 0){
+    printf("sysinfotest: fork failed\n");
+    exit(1);
+  }
+  if(pid == 0){
+    sinfo(&info);
+    if(info.nproc != nproc+1) {
+      printf("sysinfotest: FAIL nproc is %d instead of %d\n", info.nproc, nproc+1);
+      exit(1);
+    }
+    exit(0);
+  }
+  wait(&status);
+  sinfo(&info);
+  if(info.nproc != nproc) {
+      printf("sysinfotest: FAIL nproc is %d instead of %d\n", info.nproc, nproc);
+      exit(1);
+  }
+}
+
+void testbad() {
+  int pid = fork();
+  int xstatus;
+  
+  if(pid < 0){
+    printf("sysinfotest: fork failed\n");
+    exit(1);
+  }
+  if(pid == 0){
+      sinfo(0x0);
+      exit(0);
+  }
+  wait(&xstatus);
+  if(xstatus == -1)  // kernel killed child?
+    exit(0);
+  else {
+    printf("sysinfotest: testbad succeeded %d\n", xstatus);
+    exit(xstatus);
+  }
+}
+
+int
+main(int argc, char *argv[])
+{
+  printf("sysinfotest: start\n");
+  testcall();
+  testmem();
+  testproc();
+  printf("sysinfotest: OK\n");
+  exit(0);
+}