llcallstack.h

/** 
 * @file llcallstack.h
 * @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 <map>

class LLCallStackImpl;

class LLCallStack
{
public:
    LLCallStack(S32 skip_count=0, bool verbose=false);
    std::vector<std::string> m_strings;
    bool m_verbose;
    bool contains(const std::string& str);
private:
    static LLCallStackImpl *s_impl;
    S32 m_skipCount;
};

LL_COMMON_API std::ostream& operator<<(std::ostream& s, const LLCallStack& call_stack);

class LLContextStrings
{
public:
    LLContextStrings();
    static void addContextString(const std::string& str);
    static void removeContextString(const std::string& str);
    static void output(std::ostream& os);
    static LLContextStrings* getThreadLocalInstance();
    static bool contains(const std::string& str);
private:
    std::map<std::string,S32> m_contextStrings;
};

class LLScopedContextString
{
public:
    LLScopedContextString(const std::string str):
        m_str(std::move(str))
    {
        LLContextStrings::addContextString(m_str);
    }
    ~LLScopedContextString()
    {
        LLContextStrings::removeContextString(m_str);
    }
private:
    std::string m_str;
};

// Mostly exists as a class to hook an ostream override to.
struct LLContextStatus
{
    bool contains(const std::string& str);
};

LL_COMMON_API std::ostream& operator<<(std::ostream& s, const LLContextStatus& context_status);

#if ENABLE_DEBUG_MACRO
#define dumpStack(tag) \
    static const bool enable_log = debugLoggingEnabled(tag); \
    if (enable_log) \
    { \
        LLCallStack cs; \
        LL_DEBUGS(tag) << "STACK:\n" << "====================\n" << cs << "====================" << LL_ENDL; \
    }
#else
#define dumpStack(tag)
#endif