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84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
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// Copyright (c) 2009, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// ---
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// Author: Andrew Fikes
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//
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// Utility class for coalescing sampled stack traces. Not thread-safe.
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#ifndef TCMALLOC_STACK_TRACE_TABLE_H_
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#define TCMALLOC_STACK_TRACE_TABLE_H_
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#include <config.h>
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#include <stdint.h> // for uintptr_t
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#include "common.h"
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#include "page_heap_allocator.h"
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namespace tcmalloc {
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class PERFTOOLS_DLL_DECL StackTraceTable {
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public:
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// REQUIRES: L < pageheap_lock
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StackTraceTable();
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~StackTraceTable();
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// Adds stack trace "t" to table.
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//
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// REQUIRES: L >= pageheap_lock
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void AddTrace(const StackTrace& t);
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// Returns stack traces formatted per MallocExtension guidelines.
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// May return NULL on error. Clears state before returning.
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//
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// REQUIRES: L < pageheap_lock
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void** ReadStackTracesAndClear();
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// Exposed for PageHeapAllocator
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// For testing
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int depth_total() const { return depth_total_; }
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int bucket_total() const { return bucket_total_; }
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private:
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struct Entry {
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Entry* next;
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StackTrace trace;
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};
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bool error_;
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int depth_total_;
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int bucket_total_;
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Entry* head_;
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STLPageHeapAllocator<Entry, void> allocator_;
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};
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} // namespace tcmalloc
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#endif // TCMALLOC_STACK_TRACE_TABLE_H_
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