uptime() sys call for benchmarking

increase PHYSTOP

1 files changed, 23 insertions, 1 deletions

diff --git a/usertests.c b/usertests.c
index 9ad6448..670a4a8 100644
--- a/usertests.c
+++ b/usertests.c
@@ -322,8 +322,9 @@ void
 mem(void)
 {
   void *m1, *m2;
-  int pid;
+  int pid, ppid;
 
+  ppid = getpid();
   if((pid = fork()) == 0){
     m1 = 0;
     while((m2 = malloc(10001)) != 0) {
@@ -338,6 +339,7 @@ mem(void)
     m1 = malloc(1024*20);
     if(m1 == 0) {
       printf(1, "couldn't allocate mem?!!\n");
+      kill(ppid);
       exit();
     }
     free(m1);
@@ -1233,6 +1235,7 @@ void
 sbrktest(void)
 {
   int pid;
+  char *oldbrk = sbrk(0);
 
   printf(stdout, "sbrk test\n");
 
@@ -1313,6 +1316,25 @@ sbrktest(void)
     exit();
   }
 
+  // can we read the kernel's memory?
+  for(a = (char*)(640*1024); a < (char *)2000000; a += 50000){
+    int ppid = getpid();
+    int pid = fork();
+    if(pid < 0){
+      printf(stdout, "fork failed\n");
+      exit();
+    }
+    if(pid == 0){
+      printf(stdout, "oops could read %x = %x\n", a, *a);
+      kill(ppid);
+      exit();
+    }
+    wait();
+  }
+
+  if(sbrk(0) > oldbrk)
+    sbrk(-(sbrk(0) - oldbrk));
+
   printf(stdout, "sbrk test OK\n");
 }