Initial Commit

absl/base/internal/malloc_extension_test.cc

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+/*
+ * Copyright 2017 The Abseil Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <algorithm>
+#include <cstdlib>
+
+#include "gtest/gtest.h"
+#include "absl/base/internal/malloc_extension.h"
+#include "absl/base/internal/malloc_extension_c.h"
+
+namespace absl {
+namespace base_internal {
+namespace {
+
+TEST(MallocExtension, MallocExtension) {
+  void* a = malloc(1000);
+
+  size_t cxx_bytes_used, c_bytes_used;
+  if (!MallocExtension::instance()->GetNumericProperty(
+          "generic.current_allocated_bytes", &cxx_bytes_used)) {
+    EXPECT_TRUE(ABSL_MALLOC_EXTENSION_TEST_ALLOW_MISSING_EXTENSION);
+  } else {
+    ASSERT_TRUE(MallocExtension::instance()->GetNumericProperty(
+        "generic.current_allocated_bytes", &cxx_bytes_used));
+    ASSERT_TRUE(MallocExtension_GetNumericProperty(
+        "generic.current_allocated_bytes", &c_bytes_used));
+#ifndef MEMORY_SANITIZER
+    EXPECT_GT(cxx_bytes_used, 1000);
+    EXPECT_GT(c_bytes_used, 1000);
+#endif
+
+    EXPECT_TRUE(MallocExtension::instance()->VerifyAllMemory());
+    EXPECT_TRUE(MallocExtension_VerifyAllMemory());
+
+    EXPECT_EQ(MallocExtension::kOwned,
+              MallocExtension::instance()->GetOwnership(a));
+    // TODO(csilvers): this relies on undocumented behavior that
+    // GetOwnership works on stack-allocated variables.  Use a better test.
+    EXPECT_EQ(MallocExtension::kNotOwned,
+              MallocExtension::instance()->GetOwnership(&cxx_bytes_used));
+    EXPECT_EQ(MallocExtension::kNotOwned,
+              MallocExtension::instance()->GetOwnership(nullptr));
+    EXPECT_GE(MallocExtension::instance()->GetAllocatedSize(a), 1000);
+    // This is just a sanity check.  If we allocated too much, tcmalloc is
+    // broken
+    EXPECT_LE(MallocExtension::instance()->GetAllocatedSize(a), 5000);
+    EXPECT_GE(MallocExtension::instance()->GetEstimatedAllocatedSize(1000),
+              1000);
+    for (int i = 0; i < 10; ++i) {
+      void* p = malloc(i);
+      EXPECT_GE(MallocExtension::instance()->GetAllocatedSize(p),
+                MallocExtension::instance()->GetEstimatedAllocatedSize(i));
+      free(p);
+    }
+
+    // Check the c-shim version too.
+    EXPECT_EQ(MallocExtension_kOwned, MallocExtension_GetOwnership(a));
+    EXPECT_EQ(MallocExtension_kNotOwned,
+              MallocExtension_GetOwnership(&cxx_bytes_used));
+    EXPECT_EQ(MallocExtension_kNotOwned, MallocExtension_GetOwnership(nullptr));
+    EXPECT_GE(MallocExtension_GetAllocatedSize(a), 1000);
+    EXPECT_LE(MallocExtension_GetAllocatedSize(a), 5000);
+    EXPECT_GE(MallocExtension_GetEstimatedAllocatedSize(1000), 1000);
+  }
+
+  free(a);
+}
+
+// Verify that the .cc file and .h file have the same enum values.
+TEST(GetOwnership, EnumValuesEqualForCAndCXX) {
+  EXPECT_EQ(static_cast<int>(MallocExtension::kUnknownOwnership),
+            static_cast<int>(MallocExtension_kUnknownOwnership));
+  EXPECT_EQ(static_cast<int>(MallocExtension::kOwned),
+            static_cast<int>(MallocExtension_kOwned));
+  EXPECT_EQ(static_cast<int>(MallocExtension::kNotOwned),
+            static_cast<int>(MallocExtension_kNotOwned));
+}
+
+TEST(nallocx, SaneBehavior) {
+  for (size_t size = 0; size < 64 * 1024; ++size) {
+    size_t alloc_size = nallocx(size, 0);
+    EXPECT_LE(size, alloc_size) << "size is " << size;
+    EXPECT_LE(alloc_size, std::max(size + 100, 2 * size)) << "size is " << size;
+  }
+}
+
+}  // namespace
+}  // namespace base_internal
+}  // namespace absl