Revert "Reintroducing MallocHooks changes with fix for infinite loop in MallocHooks on Platform::Ex…

runtime/vm/malloc_hooks_test.cc

-// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#include "platform/globals.h"
-
-#if defined(DART_USE_TCMALLOC) && !defined(PRODUCT)
-
-#include "platform/assert.h"
-#include "vm/class_finalizer.h"
-#include "vm/globals.h"
-#include "vm/malloc_hooks.h"
-#include "vm/symbols.h"
-#include "vm/unit_test.h"
-
-namespace dart {
-
-// Note: for these tests, there is no need to call MallocHooks::Init() or
-// MallocHooks::TearDown() as this is all done by the VM test framework.
-
-static void MallocHookTestBufferInitializer(volatile char* buffer,
-                                            uintptr_t size) {
-  // Run through the buffer and do something. If we don't do this and the memory
-  // in buffer isn't touched, the tcmalloc hooks won't be called.
-  for (uintptr_t i = 0; i < size; ++i) {
-    buffer[i] = i;
-  }
-}
-
-
-UNIT_TEST_CASE(BasicMallocHookTest) {
-  MallocHooks::ResetStats();
-  EXPECT_EQ(0L, MallocHooks::allocation_count());
-  EXPECT_EQ(0L, MallocHooks::heap_allocated_memory_in_bytes());
-
-  const intptr_t buffer_size = 10;
-  char* buffer = new char[buffer_size];
-  MallocHookTestBufferInitializer(buffer, buffer_size);
-
-  EXPECT_EQ(1L, MallocHooks::allocation_count());
-  EXPECT_EQ(static_cast<intptr_t>(sizeof(char) * buffer_size),
-            MallocHooks::heap_allocated_memory_in_bytes());
-
-  delete[] buffer;
-  EXPECT_EQ(0L, MallocHooks::allocation_count());
-  EXPECT_EQ(0L, MallocHooks::heap_allocated_memory_in_bytes());
-}
-
-
-UNIT_TEST_CASE(FreeUnseenMemoryMallocHookTest) {
-  const intptr_t pre_hook_buffer_size = 3;
-  char* pre_hook_buffer = new char[pre_hook_buffer_size];
-  MallocHookTestBufferInitializer(pre_hook_buffer, pre_hook_buffer_size);
-
-  MallocHooks::ResetStats();
-  EXPECT_EQ(0L, MallocHooks::allocation_count());
-  EXPECT_EQ(0L, MallocHooks::heap_allocated_memory_in_bytes());
-
-  const intptr_t buffer_size = 10;
-  volatile char* buffer = new char[buffer_size];
-  MallocHookTestBufferInitializer(buffer, buffer_size);
-
-  EXPECT_EQ(1L, MallocHooks::allocation_count());
-  EXPECT_EQ(static_cast<intptr_t>(sizeof(char) * buffer_size),
-            MallocHooks::heap_allocated_memory_in_bytes());
-
-  delete[] pre_hook_buffer;
-  EXPECT_EQ(1L, MallocHooks::allocation_count());
-  EXPECT_EQ(static_cast<intptr_t>(sizeof(char) * buffer_size),
-            MallocHooks::heap_allocated_memory_in_bytes());
-
-
-  delete[] buffer;
-  EXPECT_EQ(0L, MallocHooks::allocation_count());
-  EXPECT_EQ(0L, MallocHooks::heap_allocated_memory_in_bytes());
-}
-
-};  // namespace dart
-
-#endif  // defined(DART_USE_TCMALLOC) && !defined(PRODUCT)