From f67a3cc33514e9d9bd3599a392876ab4e01d4f9a Mon Sep 17 00:00:00 2001
From: Ole Kristian Morud <ole.morud@gmail.com>
Date: Tue, 16 Jan 2024 01:38:49 +0100
Subject: [PATCH] Fix arena_delete()

---
 include/knob.h    | 2 +-
 src/arena.c       | 2 +-
 test/test_arena.c | 2 ++
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/knob.h b/include/knob.h
index 0b4a52c..76bd5c6 100644
--- a/include/knob.h
+++ b/include/knob.h
@@ -1,6 +1,6 @@
 
 #pragma once
 
-#define KNOB_MMAP_SIZE (1UL << 40UL)
+#define KNOB_MMAP_SIZE (1UL << 36UL)
 #define KNOB_ALIGNMENT (sizeof(char*))
 
diff --git a/src/arena.c b/src/arena.c
index c3d92b3..9c1f94f 100644
--- a/src/arena.c
+++ b/src/arena.c
@@ -114,7 +114,7 @@ int arena_delete(struct arena *a)
     if (!(a->flags & ARENA_GROW)) {
         return -1;
     }
-    int ok = munmap(a->data, a->cap);
+    int ok = munmap(a->data, KNOB_MMAP_SIZE);
     if (ok == -1) {
         arena_err("munmap");
         return -1;
diff --git a/test/test_arena.c b/test/test_arena.c
index 54e8ea3..2498e37 100644
--- a/test/test_arena.c
+++ b/test/test_arena.c
@@ -98,6 +98,8 @@ int main()
             fprintf(stderr, "arena_delete was supposed to fail, but didn't\n");
             exit(EXIT_FAILURE);
         }
+
+        free(arena_detatch(a));
     }