Make use of the address range blocking to guarantee that accessing 0xdeadbeef

and 0xcccccccc (and 64 pages thereafter) in any way will always lead to a crash.
Before it could happen that these ranges were allocated for an area and then
accessing these would not be as evident anymore. Only enabled when the
corresponding paranoid setting is enabled (which it currently is).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33033 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/heap.cpp

@@ -1912,6 +1912,15 @@ heap_init(addr_t base, size_t size)
 status_t
 heap_init_post_sem()
 {
+#if PARANOID_KERNEL_MALLOC
+	vm_block_address_range("uninitialized heap memory",
+		(void *)ROUNDDOWN(0xcccccccc, B_PAGE_SIZE), B_PAGE_SIZE * 64);
+#endif
+#if PARANOID_KERNEL_FREE
+	vm_block_address_range("freed heap memory",
+		(void *)ROUNDDOWN(0xdeadbeef, B_PAGE_SIZE), B_PAGE_SIZE * 64);
+#endif
+
 	sHeapGrowSem = create_sem(0, "heap_grow_sem");
 	if (sHeapGrowSem < 0) {
 		panic("heap_init_post_sem(): failed to create heap grow sem\n");