placement new operators

3ae1d7bd · Nickolai Zeldovich · 62934703 · 3ae1d7bd
--- a/include/cpputil.hh
+++ b/include/cpputil.hh
@@ -136,6 +136,11 @@ extern void *__dso_handle;
    return kmalloc(sizeof(classname));                              \
  }                                                                 \
                                                                    \
+  static void* operator new(unsigned long nbytes, classname *buf) { \
+    assert(nbytes == sizeof(classname));                            \
+    return buf;                                                     \
+  }                                                                 \
+                                                                    \
  static void operator delete(void *p) {                            \
    kmfree(p, sizeof(classname));                                   \
  }