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/**
* @file llallocator_heap_profile.cpp
* @brief Implementation of the parser for tcmalloc heap profile data.
* @author Brad Kittenbrink
*
* $LicenseInfo:firstyear=2009&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llallocator_heap_profile.h"
#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
LL_WARNS() << "invalid heap profile data passed into parser." << LL_ENDL;
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(j != line_elems.end());
if (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
{
for (const LLAllocatorHeapProfile::line& line : mLines)
{
out << line.mLiveCount << ": " << line.mLiveSize << '[' << line.mTotalCount << ": " << line.mTotalSize << "] @";
for (const stack_marker marker : line.mTrace)
{
out << ' ' << marker;
}
out << '\n';
}
out.flush();
}
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