Fixed various simulator-related space leaks.

test/cctest/test-disasm-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 65 matching lines @@
   assm->ASM;                                                                   \
   assm->GetCode(NULL);                                                         \
   decoder->Decode(reinterpret_cast<Instruction*>(buf));                        \
   encoding = *reinterpret_cast<uint32_t*>(buf);                                \
   if (strncmp(disasm->GetOutput(), EXP, strlen(EXP)) != 0) {                   \
     printf("%u : Encoding: %08" PRIx32 "\nExpected: %s\nFound:    %s\n",       \
            __LINE__, encoding, EXP, disasm->GetOutput());                      \
     abort();                                                                   \
   }
 
-#define CLEANUP()                                                              \
-  delete disasm;                                                               \
-  delete decoder;                                                              \
-  delete assm
+#define CLEANUP() \
+  delete disasm;  \
+  delete decoder; \
+  delete assm;    \
+  free(buf)
 
 
 static bool vm_initialized = false;
 
 
 static void InitializeVM() {
   if (!vm_initialized) {
     CcTest::InitializeVM();
     vm_initialized = true;
   }
@@ skipping 1659 matching lines @@
   COMPARE(Dsb(FullSystem, BarrierOther), "dsb sy (0b1100)");
   COMPARE(Dsb(InnerShareable, BarrierOther), "dsb sy (0b1000)");
   COMPARE(Dsb(NonShareable, BarrierOther), "dsb sy (0b0100)");
   COMPARE(Dsb(OuterShareable, BarrierOther), "dsb sy (0b0000)");
 
   // ISB
   COMPARE(Isb(), "isb");
 
   CLEANUP();
 }