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/**
* @file llallocator_heap_profile.cpp
* @brief Implementation of the parser for tcmalloc heap profile data.
* @author Brad Kittenbrink
*
* $LicenseInfo:firstyear=2009&license=viewergpl$
*
* Copyright (c) 2009-2009, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llallocator_heap_profile.h"
#if LL_MSVC
// disable warning about boost::lexical_cast returning uninitialized data
// when it fails to parse the string
#pragma warning (disable:4701)
#endif
#include <boost/algorithm/string/split.hpp>
#include <boost/bind.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/range/iterator_range.hpp>
static const std::string HEAP_PROFILE_MAGIC_STR = "heap profile:";
static bool is_separator(char c)
{
return isspace(c) || c == '[' || c == ']' || c == ':';
}
void LLAllocatorHeapProfile::parse(std::string const & prof_text)
{
// a typedef for handling a token in the string buffer
// it's a begin/end pair of string::const_iterators
typedef boost::iterator_range<std::string::const_iterator> range_t;
mLines.clear();
if(prof_text.compare(0, HEAP_PROFILE_MAGIC_STR.length(), HEAP_PROFILE_MAGIC_STR) != 0)
{
// *TODO - determine if there should be some better error state than
// mLines being empty. -brad
llwarns << "invalid heap profile data passed into parser." << llendl;
return;
}
std::vector< range_t > prof_lines;
std::string::const_iterator prof_begin = prof_text.begin() + HEAP_PROFILE_MAGIC_STR.length();
range_t prof_range(prof_begin, prof_text.end());
boost::algorithm::split(prof_lines,
prof_range,
boost::bind(std::equal_to<llwchar>(), '\n', _1));
std::vector< range_t >::const_iterator i;
for(i = prof_lines.begin(); i != prof_lines.end() && !i->empty(); ++i)
{
range_t const & line_text = *i;
std::vector<range_t> line_elems;
boost::algorithm::split(line_elems,
line_text,
is_separator);
std::vector< range_t >::iterator j;
j = line_elems.begin();
while(j != line_elems.end() && j->empty()) { ++j; } // skip any separator tokens
llassert_always(j != line_elems.end());
U32 live_count = boost::lexical_cast<U32>(*j);
++j;
while(j != line_elems.end() && j->empty()) { ++j; } // skip any separator tokens
llassert_always(j != line_elems.end());
U64 live_size = boost::lexical_cast<U64>(*j);
++j;
while(j != line_elems.end() && j->empty()) { ++j; } // skip any separator tokens
llassert_always(j != line_elems.end());
U32 tot_count = boost::lexical_cast<U32>(*j);
++j;
while(j != line_elems.end() && j->empty()) { ++j; } // skip any separator tokens
llassert_always(j != line_elems.end());
U64 tot_size = boost::lexical_cast<U64>(*j);
++j;
while(j != line_elems.end() && j->empty()) { ++j; } // skip any separator tokens
llassert_always(j != line_elems.end());
++j; // skip the '@'
mLines.push_back(line(live_count, live_size, tot_count, tot_size));
line & current_line = mLines.back();
for(; j != line_elems.end(); ++j)
{
if(!j->empty()) {
U32 marker = boost::lexical_cast<U32>(*j);
current_line.mTrace.push_back(marker);
}
}
}
// *TODO - parse MAPPED_LIBRARIES section here if we're ever interested in it
}
void LLAllocatorHeapProfile::dump(std::ostream & out) const
{
lines_t::const_iterator i;
for(i = mLines.begin(); i != mLines.end(); ++i)
{
out << i->mLiveCount << ": " << i->mLiveSize << '[' << i->mTotalCount << ": " << i->mTotalSize << "] @";
stack_trace::const_iterator j;
for(j = i->mTrace.begin(); j != i->mTrace.end(); ++j)
{
out << ' ' << *j;
}
out << '\n';
}
out.flush();
}
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