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Diffstat (limited to 'openjdkjvmti/jvmti_allocator.h')
-rw-r--r-- | openjdkjvmti/jvmti_allocator.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/openjdkjvmti/jvmti_allocator.h b/openjdkjvmti/jvmti_allocator.h new file mode 100644 index 0000000000..e29e034f40 --- /dev/null +++ b/openjdkjvmti/jvmti_allocator.h @@ -0,0 +1,174 @@ +/* Copyright (C) 2016 The Android Open Source Project + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This file implements interfaces from the file jvmti.h. This implementation + * is licensed under the same terms as the file jvmti.h. The + * copyright and license information for the file jvmti.h follows. + * + * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +#ifndef ART_OPENJDKJVMTI_JVMTI_ALLOCATOR_H_ +#define ART_OPENJDKJVMTI_JVMTI_ALLOCATOR_H_ + +#include "base/logging.h" +#include "base/macros.h" +#include "jvmti.h" + +#include "ti_allocator.h" + +namespace openjdkjvmti { + +template <typename T> class JvmtiAllocator; + +template <> +class JvmtiAllocator<void> { + public: + typedef void value_type; + typedef void* pointer; + typedef const void* const_pointer; + + template <typename U> + struct rebind { + typedef JvmtiAllocator<U> other; + }; + + explicit JvmtiAllocator(jvmtiEnv* env) : env_(env) {} + explicit JvmtiAllocator() : env_(nullptr) {} + + template <typename U> + JvmtiAllocator(const JvmtiAllocator<U>& other) // NOLINT, implicit + : env_(other.env_) {} + + JvmtiAllocator(const JvmtiAllocator& other) = default; + JvmtiAllocator& operator=(const JvmtiAllocator& other) = default; + ~JvmtiAllocator() = default; + + private: + jvmtiEnv* env_; + + template <typename U> + friend class JvmtiAllocator; + + template <typename U> + friend bool operator==(const JvmtiAllocator<U>& lhs, const JvmtiAllocator<U>& rhs); +}; + +template <typename T> +class JvmtiAllocator { + public: + typedef T value_type; + typedef T* pointer; + typedef T& reference; + typedef const T* const_pointer; + typedef const T& const_reference; + typedef size_t size_type; + typedef ptrdiff_t difference_type; + + template <typename U> + struct rebind { + typedef JvmtiAllocator<U> other; + }; + + explicit JvmtiAllocator(jvmtiEnv* env) : env_(env) {} + explicit JvmtiAllocator() : env_(nullptr) {} + + template <typename U> + JvmtiAllocator(const JvmtiAllocator<U>& other) // NOLINT, implicit + : env_(other.env_) {} + + JvmtiAllocator(const JvmtiAllocator& other) = default; + JvmtiAllocator& operator=(const JvmtiAllocator& other) = default; + ~JvmtiAllocator() = default; + + size_type max_size() const { + return static_cast<size_type>(-1) / sizeof(T); + } + + pointer address(reference x) const { return &x; } + const_pointer address(const_reference x) const { return &x; } + + pointer allocate(size_type n, JvmtiAllocator<void>::pointer hint ATTRIBUTE_UNUSED = nullptr) { + DCHECK_LE(n, max_size()); + if (env_ == nullptr) { + T* result = reinterpret_cast<T*>(AllocUtil::AllocateImpl(n * sizeof(T))); + CHECK(result != nullptr || n == 0u); // Abort if AllocateImpl() fails. + return result; + } else { + unsigned char* result; + jvmtiError alloc_error = env_->Allocate(n * sizeof(T), &result); + CHECK(alloc_error == JVMTI_ERROR_NONE); + return reinterpret_cast<T*>(result); + } + } + void deallocate(pointer p, size_type n ATTRIBUTE_UNUSED) { + if (env_ == nullptr) { + AllocUtil::DeallocateImpl(reinterpret_cast<unsigned char*>(p)); + } else { + jvmtiError dealloc_error = env_->Deallocate(reinterpret_cast<unsigned char*>(p)); + CHECK(dealloc_error == JVMTI_ERROR_NONE); + } + } + + void construct(pointer p, const_reference val) { + new (static_cast<void*>(p)) value_type(val); + } + template <class U, class... Args> + void construct(U* p, Args&&... args) { + ::new (static_cast<void*>(p)) U(std::forward<Args>(args)...); + } + void destroy(pointer p) { + p->~value_type(); + } + + inline bool operator==(JvmtiAllocator const& other) { + return env_ == other.env_; + } + inline bool operator!=(JvmtiAllocator const& other) { + return !operator==(other); + } + + private: + jvmtiEnv* env_; + + template <typename U> + friend class JvmtiAllocator; + + template <typename U> + friend bool operator==(const JvmtiAllocator<U>& lhs, const JvmtiAllocator<U>& rhs); +}; + +template <typename T> +inline bool operator==(const JvmtiAllocator<T>& lhs, const JvmtiAllocator<T>& rhs) { + return lhs.env_ == rhs.env_; +} + +template <typename T> +inline bool operator!=(const JvmtiAllocator<T>& lhs, const JvmtiAllocator<T>& rhs) { + return !(lhs == rhs); +} + +} // namespace openjdkjvmti + +#endif // ART_OPENJDKJVMTI_JVMTI_ALLOCATOR_H_ |