fdf882ded2
Summary: When dynamically linking two binaries together, different builds of RocksDB from two sources might cause errors. To provide a tool for user to solve the problem, the RocksDB namespace is changed to a flag which can be overridden in build time. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6433 Test Plan: Build release, all and jtest. Try to build with ROCKSDB_NAMESPACE with another flag. Differential Revision: D19977691 fbshipit-source-id: aa7f2d0972e1c31d75339ac48478f34f6cfcfb3e
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#pragma once
|
|
|
|
#include <atomic>
|
|
#include <vector>
|
|
|
|
#include "port/jemalloc_helper.h"
|
|
#include "port/port.h"
|
|
#include "rocksdb/memory_allocator.h"
|
|
#include "util/thread_local.h"
|
|
|
|
#if defined(ROCKSDB_JEMALLOC) && defined(ROCKSDB_PLATFORM_POSIX)
|
|
|
|
#include <sys/mman.h>
|
|
|
|
#if (JEMALLOC_VERSION_MAJOR >= 5) && defined(MADV_DONTDUMP)
|
|
#define ROCKSDB_JEMALLOC_NODUMP_ALLOCATOR
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
class JemallocNodumpAllocator : public MemoryAllocator {
|
|
public:
|
|
JemallocNodumpAllocator(JemallocAllocatorOptions& options,
|
|
std::unique_ptr<extent_hooks_t>&& arena_hooks,
|
|
unsigned arena_index);
|
|
~JemallocNodumpAllocator();
|
|
|
|
const char* Name() const override { return "JemallocNodumpAllocator"; }
|
|
void* Allocate(size_t size) override;
|
|
void Deallocate(void* p) override;
|
|
size_t UsableSize(void* p, size_t allocation_size) const override;
|
|
|
|
private:
|
|
friend Status NewJemallocNodumpAllocator(
|
|
JemallocAllocatorOptions& options,
|
|
std::shared_ptr<MemoryAllocator>* memory_allocator);
|
|
|
|
// Custom alloc hook to replace jemalloc default alloc.
|
|
static void* Alloc(extent_hooks_t* extent, void* new_addr, size_t size,
|
|
size_t alignment, bool* zero, bool* commit,
|
|
unsigned arena_ind);
|
|
|
|
// Destroy arena on destruction of the allocator, or on failure.
|
|
static Status DestroyArena(unsigned arena_index);
|
|
|
|
// Destroy tcache on destruction of the allocator, or thread exit.
|
|
static void DestroyThreadSpecificCache(void* ptr);
|
|
|
|
// Get or create tcache. Return flag suitable to use with `mallocx`:
|
|
// either MALLOCX_TCACHE_NONE or MALLOCX_TCACHE(tc).
|
|
int GetThreadSpecificCache(size_t size);
|
|
|
|
// A function pointer to jemalloc default alloc. Use atomic to make sure
|
|
// NewJemallocNodumpAllocator is thread-safe.
|
|
//
|
|
// Hack: original_alloc_ needs to be static for Alloc() to access it.
|
|
// alloc needs to be static to pass to jemalloc as function pointer.
|
|
static std::atomic<extent_alloc_t*> original_alloc_;
|
|
|
|
const JemallocAllocatorOptions options_;
|
|
|
|
// Custom hooks has to outlive corresponding arena.
|
|
const std::unique_ptr<extent_hooks_t> arena_hooks_;
|
|
|
|
// Arena index.
|
|
const unsigned arena_index_;
|
|
|
|
// Hold thread-local tcache index.
|
|
ThreadLocalPtr tcache_;
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
#endif // (JEMALLOC_VERSION_MAJOR >= 5) && MADV_DONTDUMP
|
|
#endif // ROCKSDB_JEMALLOC && ROCKSDB_PLATFORM_POSIX
|