release/1.1.5.1_cvsreleng/1

1 files changed, 40 insertions, 0 deletions

diff --git a/lib/libmalloc/tests/t1.c b/lib/libmalloc/tests/t1.c
new file mode 100644
index 000000000000..7cdde93e4946
--- /dev/null
+++ b/lib/libmalloc/tests/t1.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+
+#define MAXALLOCS   1000
+#define SIZE	    50
+
+extern char *sbrk();
+extern char *malloc();
+
+main()
+{
+    char *ptr[MAXALLOCS];
+    char *obrk, *nbrk;
+    int i;
+
+    obrk = sbrk(0);
+    printf("break is initially 0x%x\n", obrk);
+    
+    for(i = 0; i < MAXALLOCS; i++) {
+	ptr[i] = malloc(SIZE);
+    }
+    nbrk = sbrk(0);
+    printf("break is 0x%x (%d bytes sbrked) after %d allocations of %d\n",
+     nbrk, nbrk - obrk, MAXALLOCS, SIZE);
+    for(i = 0; i < MAXALLOCS; i++) {
+	free(ptr[i]);
+    }
+    nbrk = sbrk(0);
+    printf("break is 0x%x (%d bytes sbrked) after freeing all allocations\n",
+     nbrk, nbrk - obrk);
+    fflush(stdout);
+
+    /* Should be enough memory for this without needing to sbrk */
+    (void) malloc(SIZE * (MAXALLOCS / 2));
+    nbrk = sbrk(0);
+    
+    printf("break is 0x%x (%d bytes sbrked) after allocating %d\n",
+     nbrk, nbrk - obrk, SIZE * (MAXALLOCS/2));
+
+    exit(0);
+}