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author | csilvers <csilvers@6b5cf1ce-ec42-a296-1ba9-69fdba395a50> | 2010-01-20 23:01:09 +0000 |
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committer | csilvers <csilvers@6b5cf1ce-ec42-a296-1ba9-69fdba395a50> | 2010-01-20 23:01:09 +0000 |
commit | ddf6aeeb1079bb802cbbabdbc41c4545245d344f (patch) | |
tree | 79f5eed6c847d9c6722e787c94f1370830d1c80f /trunk/src/stack_trace_table.h | |
parent | bec0b6dbdf230e7b0b13168b8b45e8b6ded792b9 (diff) | |
download | gperftools-ddf6aeeb1079bb802cbbabdbc41c4545245d344f.tar.gz |
Tag for google-perftools 1.5google-perftools-1.5
git-svn-id: http://gperftools.googlecode.com/svn/tags/google-perftools-1.5@87 6b5cf1ce-ec42-a296-1ba9-69fdba395a50
Diffstat (limited to 'trunk/src/stack_trace_table.h')
-rw-r--r-- | trunk/src/stack_trace_table.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/trunk/src/stack_trace_table.h b/trunk/src/stack_trace_table.h new file mode 100644 index 0000000..799571a --- /dev/null +++ b/trunk/src/stack_trace_table.h @@ -0,0 +1,88 @@ +// Copyright (c) 2009, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// --- +// Author: Andrew Fikes +// +// Utility class for coalescing sampled stack traces. Not thread-safe. + +#ifndef TCMALLOC_STACK_TRACE_TABLE_H_ +#define TCMALLOC_STACK_TRACE_TABLE_H_ + +#include <config.h> +#include "common.h" + +namespace tcmalloc { + +class PERFTOOLS_DLL_DECL StackTraceTable { + public: + // REQUIRES: L < pageheap_lock + StackTraceTable(); + ~StackTraceTable(); + + // Adds stack trace "t" to table. + // + // REQUIRES: L >= pageheap_lock + void AddTrace(const StackTrace& t); + + // Returns stack traces formatted per MallocExtension guidelines. + // May return NULL on error. Clears state before returning. + // + // REQUIRES: L < pageheap_lock + void** ReadStackTracesAndClear(); + + // Exposed for PageHeapAllocator + struct Bucket { + // Key + uintptr_t hash; + StackTrace trace; + + // Payload + int count; + Bucket* next; + + bool KeyEqual(uintptr_t h, const StackTrace& t) const; + }; + + // For testing + int depth_total() const { return depth_total_; } + int bucket_total() const { return bucket_total_; } + + private: + static const int kHashTableSize = 1 << 14; // => table_ is 128k + + bool error_; + int depth_total_; + int bucket_total_; + Bucket** table_; +}; + +} // namespace tcmalloc + +#endif // TCMALLOC_STACK_TRACE_TABLE_H_ |