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deps/oblib/src/lib/alloc/malloc_hook.h

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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.
+ */
+
+#ifndef MALLOC_HOOK_H
+#define MALLOC_HOOK_H
+#include <cstddef>
+#include "lib/coro/co_var.h"
+
+namespace oceanbase {
+namespace lib {
+extern int64_t memalign_size;
+static const uint32_t HOOK_MAGIC_CODE = 0XA1B2C3D4;
+struct HookHeader {
+  HookHeader() : MAGIC_CODE_(HOOK_MAGIC_CODE), from_glibc_(0), offset_(0)
+  {}
+  uint32_t MAGIC_CODE_;
+  uint32_t data_size_;
+  uint8_t from_glibc_;
+  uint64_t offset_;
+  char padding__[8];
+  char data_[0];
+} __attribute__((aligned(16)));
+
+static const uint32_t HOOK_HEADER_SIZE = offsetof(HookHeader, data_);
+
+enum GLIBC_HOOK_OPT { GHO_NOHOOK, GHO_HOOK, GHO_NONULL };
+extern RLOCAL(int, glibc_hook_opt);
+}  // namespace lib
+}  // namespace oceanbase
+
+#endif /* MALLOC_HOOK_H */