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53 lines
1.5 KiB
53 lines
1.5 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/malloc_stats.h"
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#include <string.h>
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#include <memory>
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#include "port/jemalloc_helper.h"
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namespace ROCKSDB_NAMESPACE {
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#ifdef ROCKSDB_JEMALLOC
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struct MallocStatus {
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char* cur;
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char* end;
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};
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static void GetJemallocStatus(void* mstat_arg, const char* status) {
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MallocStatus* mstat = reinterpret_cast<MallocStatus*>(mstat_arg);
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size_t status_len = status ? strlen(status) : 0;
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size_t buf_size = (size_t)(mstat->end - mstat->cur);
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if (!status_len || status_len > buf_size) {
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return;
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}
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snprintf(mstat->cur, buf_size, "%s", status);
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mstat->cur += status_len;
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}
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void DumpMallocStats(std::string* stats) {
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if (!HasJemalloc()) {
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return;
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}
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MallocStatus mstat;
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const unsigned int kMallocStatusLen = 1000000;
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std::unique_ptr<char[]> buf{new char[kMallocStatusLen + 1]};
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mstat.cur = buf.get();
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mstat.end = buf.get() + kMallocStatusLen;
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malloc_stats_print(GetJemallocStatus, &mstat, "");
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stats->append(buf.get());
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}
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#else
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void DumpMallocStats(std::string*) {}
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#endif // ROCKSDB_JEMALLOC
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} // namespace ROCKSDB_NAMESPACE
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