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/**
* @file llcallstack.cpp
* @brief run-time extraction of the current callstack
*
* $LicenseInfo:firstyear=2016&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2016, 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 "llcommon.h"
#include "llcallstack.h"
#include "StackWalker.h"
#if LL_WINDOWS
class LLCallStackImpl: public StackWalker
{
public:
LLCallStackImpl():
StackWalker(false,0) // non-verbose, options = 0
{
}
~LLCallStackImpl()
{
}
void getStack(std::vector<std::string>& stack, S32 skip_count=0, bool verbose=false)
{
m_stack.clear();
ShowCallstack(verbose);
// Skip the first few lines because they're just bookkeeping for LLCallStack,
// plus any additional lines requested to skip.
S32 first_line = skip_count + 3;
for (S32 i=first_line; i<m_stack.size(); ++i)
{
stack.push_back(m_stack[i]);
}
}
protected:
virtual void OnOutput(LPCSTR szText)
{
m_stack.push_back(szText);
}
std::vector<std::string> m_stack;
};
#else
// Stub - not implemented currently on other platforms.
class LLCallStackImpl
{
public:
LLCallStackImpl() {}
~LLCallStackImpl() {}
void getStack(std::vector<std::string>& stack, S32 skip_count=0)
{
stack.clear();
}
};
#endif
LLCallStackImpl *LLCallStack::s_impl = NULL;
LLCallStack::LLCallStack(S32 skip_count, bool verbose):
m_skipCount(skip_count),
m_verbose(verbose)
{
if (!s_impl)
{
s_impl = new LLCallStackImpl;
}
LLTimer t;
s_impl->getStack(m_strings, m_skipCount, m_verbose);
}
std::ostream& operator<<(std::ostream& s, const LLCallStack& call_stack)
{
std::vector<std::string>::const_iterator it;
for (it=call_stack.m_strings.begin(); it!=call_stack.m_strings.end(); ++it)
{
s << *it;
}
return s;
}
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