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deps/oblib/unittest/lib/alloc/test_malloc_hook.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include <gtest/gtest.h>
+#include <malloc.h>
+#include "lib/oblog/ob_log.h"
+#include "lib/alloc/malloc_hook.h"
+
+using namespace oceanbase;
+using namespace oceanbase::lib;
+using namespace oceanbase::common;
+
+int main(int argc, char* argv[])
+{
+  oceanbase::common::ObLogger::get_logger().set_log_level("INFO");
+  OB_LOGGER.set_log_level("INFO");
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
+
+class TestMallocHook : public ::testing::Test {
+  public:
+  virtual void SetUp()
+  {}
+
+  virtual void TearDown()
+  {}
+};
+
+TEST_F(TestMallocHook, Basic)
+{
+  const static size_t size = 100;
+  for (int i = 0; i < 3; i++) {
+    if (0 == i) {
+      lib::glibc_hook_opt = GHO_NOHOOK;
+    } else if (1 == i) {
+      lib::glibc_hook_opt = GHO_HOOK;
+    } else {
+      lib::glibc_hook_opt = GHO_NONULL;
+    }
+    bool from_glibc = 0 == i;
+    void* ptr = nullptr;
+
+    // calloc
+    char zero_buf[100];
+    memset(zero_buf, 0, 100);
+    ptr = calloc(10, 10);
+    ASSERT_NE(ptr, nullptr);
+    memset(ptr, 0, size);
+    HookHeader* header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, 10 * 10);
+    // check 0
+    ASSERT_EQ(0, memcmp(ptr, zero_buf, 100));
+    free(ptr);
+
+    // malloc
+    ptr = malloc(size);
+    ASSERT_NE(ptr, nullptr);
+    header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size);
+    char buf[size];
+    memset(buf, 'a', size);
+    memcpy(ptr, buf, size);
+
+    // realloc
+    void* new_ptr = realloc(ptr, size * 2);
+    ASSERT_NE(new_ptr, nullptr);
+    header = reinterpret_cast<HookHeader*>((char*)new_ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size * 2);
+    ASSERT_EQ(0, memcmp(new_ptr, buf, size));
+    free(new_ptr);
+
+    // realloc(nullptr, size > 0);
+    ptr = realloc(nullptr, size);
+    ASSERT_NE(ptr, nullptr);
+    header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size);
+
+    // realloc(size zoom in && out);
+    ptr = malloc(size);
+    ASSERT_NE(ptr, nullptr);
+    header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size);
+    // zoom in
+    ptr = realloc(ptr, size * 2);
+    ASSERT_NE(ptr, nullptr);
+    header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size * 2);
+    // zoom out
+    ptr = realloc(ptr, size);
+    ASSERT_NE(ptr, nullptr);
+    header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size);
+
+    // memalign
+    size_t alignment = 4L << 10;
+    ptr = memalign(alignment, size);
+    ASSERT_NE(ptr, nullptr);
+    ASSERT_EQ(0, (size_t)ptr & (alignment - 1));
+    header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size);
+    free(ptr);
+
+    // valloc && realloc
+    ptr = valloc(size);
+    ASSERT_NE(ptr, nullptr);
+    ASSERT_EQ(0, (size_t)ptr & (sysconf(_SC_PAGESIZE) - 1));
+    header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size);
+    new_ptr = realloc(ptr, size * 2);
+    header = reinterpret_cast<HookHeader*>((char*)new_ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    ASSERT_EQ(header->data_size_, size * 2);
+
+    // posix_memalign
+    posix_memalign(&ptr, 32, size);
+    ASSERT_NE(ptr, nullptr);
+    free(ptr);
+  }
+
+  // realloc && cross
+  for (int i = 0; i < 2; i++) {
+    lib::glibc_hook_opt = 0 == i ? GHO_NOHOOK : GHO_HOOK;
+    bool from_glibc = 0 == i;
+    void* ptr = malloc(size);
+    ASSERT_NE(ptr, nullptr);
+    HookHeader* header = reinterpret_cast<HookHeader*>((char*)ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == from_glibc);
+    char buf[size];
+    memset(buf, 'a', size);
+    memcpy(ptr, buf, size);
+    lib::glibc_hook_opt = 0 == i ? GHO_HOOK : GHO_NOHOOK;
+    void* new_ptr = realloc(ptr, size * 2);
+    ASSERT_NE(new_ptr, nullptr);
+    header = reinterpret_cast<HookHeader*>((char*)new_ptr - HOOK_HEADER_SIZE);
+    ASSERT_TRUE(header->from_glibc_ == !from_glibc);
+    ASSERT_EQ(header->data_size_, size * 2);
+    ASSERT_EQ(0, memcmp(new_ptr, buf, size));
+    lib::glibc_hook_opt = 0 == i ? GHO_NOHOOK : GHO_HOOK;
+    void* ret = realloc(new_ptr, 0);
+    ASSERT_EQ(ret, nullptr);
+  }
+
+  // strdup
+  char* str = strdup("test");
+  HookHeader* header = reinterpret_cast<HookHeader*>((char*)str - HOOK_HEADER_SIZE);
+  ASSERT_EQ(0, strcmp(str, "test"));
+  ASSERT_EQ(header->MAGIC_CODE_, HOOK_MAGIC_CODE);
+#ifdef NDEBUG
+  memset(header, 0, sizeof(HookHeader));
+  // Avoid order rearrangement
+  std::cout << str << std::endl;
+#endif
+  free(str);
+}