Merge remote-tracking branch 'secondlife/release/2024.08-DeltaFPS' into 2024.08-DeltaFPS

67 files changed, 892 insertions, 1186 deletions

diff --git a/indra/llcommon/CMakeLists.txt b/indra/llcommon/CMakeLists.txt
index e611847a24..a74309385f 100644
--- a/indra/llcommon/CMakeLists.txt
+++ b/indra/llcommon/CMakeLists.txt
@@ -12,7 +12,6 @@ if (USE_AUTOBUILD_3P OR USE_CONAN)
 include(Copy3rdPartyLibs)
 endif ()
 include(ZLIBNG)
-include(URIPARSER)
 include(Tracy)
 
 
@@ -21,8 +20,6 @@ set(llcommon_SOURCE_FILES
     commoncontrol.cpp
     indra_constants.cpp
     lazyeventapi.cpp
-    llallocator.cpp
-    llallocator_heap_profile.cpp
     llapp.cpp
     llapr.cpp
     llassettype.cpp
@@ -31,7 +28,6 @@ set(llcommon_SOURCE_FILES
     llbase64.cpp
     llbitpack.cpp
     llcallbacklist.cpp
-    llcallstack.cpp
     llcleanup.cpp
     llcommon.cpp
     llcommonutils.cpp
@@ -130,8 +126,6 @@ set(llcommon_HEADER_FILES
     lazyeventapi.h
     linden_common.h
     llalignedarray.h
-    llallocator.h
-    llallocator_heap_profile.h
     llapp.h
     llapr.h
     llassettype.h
@@ -141,7 +135,6 @@ set(llcommon_HEADER_FILES
     llbitpack.h
     llboost.h
     llcallbacklist.h
-    llcallstack.h
     llcleanup.h
     llcommon.h
     llcommonutils.h
@@ -274,6 +267,10 @@ if (DARWIN)
   list(APPEND llcommon_SOURCE_FILES llsys_objc.mm)
 endif (DARWIN)
 
+if (USE_TRACY)
+  list(APPEND llcommon_SOURCE_FILES llprofiler.cpp)
+endif ()
+
 list(APPEND llcommon_SOURCE_FILES ${llcommon_HEADER_FILES})
 
 add_library (llcommon ${llcommon_SOURCE_FILES})
@@ -284,7 +281,6 @@ target_link_libraries(
         ll::expat
         ll::zlib-ng
         ll::boost
-        ll::uriparser
         ll::oslibraries
         ll::tracy
     )
diff --git a/indra/llcommon/llallocator.cpp b/indra/llcommon/llallocator.cpp
deleted file mode 100644
index abe3779b85..0000000000
--- a/indra/llcommon/llallocator.cpp
+++ /dev/null
@@ -1,58 +0,0 @@
-/**
- * @file llallocator.cpp
- * @brief Implementation of the LLAllocator class.
- *
- * $LicenseInfo:firstyear=2009&license=viewerlgpl$
- * 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.h"
-
-//
-// stub implementations for when tcmalloc is disabled
-//
-
-void LLAllocator::setProfilingEnabled(bool should_enable)
-{
-}
-
-// static
-bool LLAllocator::isProfiling()
-{
-    return false;
-}
-
-std::string LLAllocator::getRawProfile()
-{
-    return std::string();
-}
-
-LLAllocatorHeapProfile const & LLAllocator::getProfile()
-{
-    mProf.mLines.clear();
-
-    // *TODO - avoid making all these extra copies of things...
-    std::string prof_text = getRawProfile();
-    //std::cout << prof_text << std::endl;
-    mProf.parse(prof_text);
-    return mProf;
-}
diff --git a/indra/llcommon/llallocator.h b/indra/llcommon/llallocator.h
deleted file mode 100644
index aa3eead546..0000000000
--- a/indra/llcommon/llallocator.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/**
- * @file llallocator.h
- * @brief Declaration of the LLAllocator class.
- *
- * $LicenseInfo:firstyear=2009&license=viewerlgpl$
- * 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
- * $/LicenseInfo$
- */
-
-#ifndef LL_LLALLOCATOR_H
-#define LL_LLALLOCATOR_H
-
-#include <string>
-
-#include "llallocator_heap_profile.h"
-
-class LL_COMMON_API LLAllocator {
-    friend class LLMemoryView;
-
-public:
-    void setProfilingEnabled(bool should_enable);
-
-    static bool isProfiling();
-
-    LLAllocatorHeapProfile const & getProfile();
-
-private:
-    std::string getRawProfile();
-
-private:
-    LLAllocatorHeapProfile mProf;
-};
-
-#endif // LL_LLALLOCATOR_H
diff --git a/indra/llcommon/llallocator_heap_profile.cpp b/indra/llcommon/llallocator_heap_profile.cpp
deleted file mode 100644
index 85e56b4db4..0000000000
--- a/indra/llcommon/llallocator_heap_profile.cpp
+++ /dev/null
@@ -1,145 +0,0 @@
-/**
- * @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"
-
-#if LL_MSVC
-// disable warning about boost::lexical_cast returning uninitialized data
-// when it fails to parse the string
-#pragma warning (disable:4701)
-#pragma warning (disable:4702)
-#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
-        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();
-}
-
diff --git a/indra/llcommon/llallocator_heap_profile.h b/indra/llcommon/llallocator_heap_profile.h
deleted file mode 100644
index 22f284b703..0000000000
--- a/indra/llcommon/llallocator_heap_profile.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/**
- * @file llallocator_heap_profile.h
- * @brief Declaration 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
- * $/LicenseInfo$
- */
-
-#ifndef LL_LLALLOCATOR_HEAP_PROFILE_H
-#define LL_LLALLOCATOR_HEAP_PROFILE_H
-
-#include "stdtypes.h"
-
-#include <map>
-#include <vector>
-
-class LLAllocatorHeapProfile
-{
-public:
-    typedef int stack_marker;
-
-    typedef std::vector<stack_marker> stack_trace;
-
-    struct line {
-        line(U32 live_count, U64 live_size, U32 tot_count, U64 tot_size) :
-            mLiveSize(live_size),
-            mTotalSize(tot_size),
-            mLiveCount(live_count),
-            mTotalCount(tot_count)
-        {
-        }
-        U64 mLiveSize, mTotalSize;
-        U32 mLiveCount, mTotalCount;
-        stack_trace mTrace;
-    };
-
-    typedef std::vector<line> lines_t;
-
-    LLAllocatorHeapProfile()
-    {
-    }
-
-    void parse(std::string const & prof_text);
-
-    void dump(std::ostream & out) const;
-
-public:
-    lines_t mLines;
-};
-
-
-#endif // LL_LLALLOCATOR_HEAP_PROFILE_H
diff --git a/indra/llcommon/llapp.cpp b/indra/llcommon/llapp.cpp
index b85bd2573b..6da764f94c 100644
--- a/indra/llcommon/llapp.cpp
+++ b/indra/llcommon/llapp.cpp
@@ -90,7 +90,7 @@ bool LLApp::sDisableCrashlogger = false;
 
 // Local flag for whether or not to do logging in signal handlers.
 //static
-bool LLApp::sLogInSignal = false;
+bool LLApp::sLogInSignal = true;
 
 // static
 // Keeps track of application status
@@ -373,6 +373,9 @@ static std::map<LLApp::EAppStatus, const char*> statusDesc
 // static
 void LLApp::setStatus(EAppStatus status)
 {
+    auto status_it = statusDesc.find(status);
+    std::string status_text = status_it != statusDesc.end() ? std::string(status_it->second) : std::to_string(status);
+    LL_INFOS() << "status: " << status_text << LL_ENDL;
     // notify everyone waiting on sStatus any time its value changes
     sStatus.set_all(status);
 
@@ -381,18 +384,7 @@ void LLApp::setStatus(EAppStatus status)
     if (! LLEventPumps::wasDeleted())
     {
         // notify interested parties of status change
-        LLSD statsd;
-        auto found = statusDesc.find(status);
-        if (found != statusDesc.end())
-        {
-            statsd = found->second;
-        }
-        else
-        {
-            // unknown status? at least report value
-            statsd = LLSD::Integer(status);
-        }
-        LLEventPumps::instance().obtain("LLApp").post(llsd::map("status", statsd));
+        LLEventPumps::instance().obtain("LLApp").post(llsd::map("status", status_text));
     }
 }
 
@@ -487,6 +479,33 @@ int LLApp::getPid()
 #endif
 }
 
+// static
+void LLApp::notifyOutOfDiskSpace()
+{
+    static const U32Seconds min_interval = U32Seconds(60);
+    static U32Seconds min_time_to_send = U32Seconds(0);
+    U32Seconds now = LLTimer::getTotalTime();
+    if (now < min_time_to_send)
+        return;
+
+    min_time_to_send = now + min_interval;
+
+    if (LLApp* app = instance())
+    {
+        app->sendOutOfDiskSpaceNotification();
+    }
+    else
+    {
+        LL_WARNS() << "No app instance" << LL_ENDL;
+    }
+}
+
+// virtual
+void LLApp::sendOutOfDiskSpaceNotification()
+{
+    LL_WARNS() << "Should never be called" << LL_ENDL; // Should be overridden
+}
+
 #ifndef LL_WINDOWS
 void setup_signals()
 {
@@ -654,6 +673,7 @@ void default_unix_signal_handler(int signum, siginfo_t *info, void *)
             {
                 LL_WARNS() << "Signal handler - Handling fatal signal!" << LL_ENDL;
             }
+
             if (LLApp::isError())
             {
                 // Received second fatal signal while handling first, just die right now
@@ -691,11 +711,11 @@ void default_unix_signal_handler(int signum, siginfo_t *info, void *)
             clear_signals();
             raise(signum);
             return;
-        } else {
-            if (LLApp::sLogInSignal)
-            {
-                LL_INFOS() << "Signal handler - Unhandled signal " << signum << ", ignoring!" << LL_ENDL;
-            }
+        }
+
+        if (LLApp::sLogInSignal)
+        {
+            LL_INFOS() << "Signal handler - Unhandled signal " << signum << ", ignoring!" << LL_ENDL;
         }
     }
 }
diff --git a/indra/llcommon/llapp.h b/indra/llcommon/llapp.h
index ad8912ca88..d90ecdf661 100644
--- a/indra/llcommon/llapp.h
+++ b/indra/llcommon/llapp.h
@@ -202,6 +202,8 @@ public:
     static bool isExiting(); // Either quitting or error (app is exiting, cleanly or not)
     static int getPid();
 
+    static void notifyOutOfDiskSpace();
+
     //
     // Sleep for specified time while still running
     //
@@ -301,6 +303,8 @@ protected:
       */
     void stepFrame();
 
+    virtual void sendOutOfDiskSpaceNotification();
+
 private:
     // Contains the filename of the minidump file after a crash.
     char mMinidumpPath[MAX_MINDUMP_PATH_LENGTH];
diff --git a/indra/llcommon/llapr.cpp b/indra/llcommon/llapr.cpp
index b085f8f5dc..01763c49aa 100644
--- a/indra/llcommon/llapr.cpp
+++ b/indra/llcommon/llapr.cpp
@@ -28,6 +28,7 @@
 
 #include "linden_common.h"
 #include "llapr.h"
+#include "llapp.h"
 #include "llmutex.h"
 #include "apr_dso.h"
 
@@ -606,7 +607,11 @@ S32 LLAPRFile::writeEx(const std::string& filename, const void *buf, S32 offset,
         apr_status_t s = apr_file_write(file_handle, buf, &bytes_written);
         if (s != APR_SUCCESS)
         {
-            LL_WARNS("APR") << " Attempting to write filename: " << filename << LL_ENDL;
+            LL_WARNS("APR") << "Attempting to write filename: " << filename << LL_ENDL;
+            if (APR_STATUS_IS_ENOSPC(s))
+            {
+                LLApp::notifyOutOfDiskSpace();
+            }
             ll_apr_warn_status(s);
             bytes_written = 0;
         }
diff --git a/indra/llcommon/llapr.h b/indra/llcommon/llapr.h
index 00ff4d60b7..10b0a55986 100644
--- a/indra/llcommon/llapr.h
+++ b/indra/llcommon/llapr.h
@@ -42,6 +42,7 @@
 #include "llstring.h"
 
 #include "mutex.h"
+#include <memory>
 
 struct apr_dso_handle_t;
 /**
diff --git a/indra/llcommon/llcallstack.cpp b/indra/llcommon/llcallstack.cpp
deleted file mode 100644
index c0be4f598e..0000000000
--- a/indra/llcommon/llcallstack.cpp
+++ /dev/null
@@ -1,188 +0,0 @@
-/**
- * @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 "linden_common.h"
-
-#include "llcommon.h"
-#include "llcallstack.h"
-#include "StackWalker.h"
-#include "llthreadlocalstorage.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, bool verbose=false)
-    {
-        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);
-}
-
-bool LLCallStack::contains(const std::string& str)
-{
-    for (const std::string& src_str : m_strings)
-    {
-        if (src_str.find(str) != std::string::npos)
-        {
-            return true;
-        }
-    }
-    return false;
-}
-
-std::ostream& operator<<(std::ostream& s, const LLCallStack& call_stack)
-{
-#ifndef LL_RELEASE_FOR_DOWNLOAD
-    for (const std::string& str : call_stack.m_strings)
-    {
-        s << str;
-    }
-#else
-    s << "UNAVAILABLE IN RELEASE";
-#endif
-    return s;
-}
-
-LLContextStrings::LLContextStrings()
-{
-}
-
-// static
-LLContextStrings* LLContextStrings::getThreadLocalInstance()
-{
-    LLContextStrings *cons = LLThreadLocalSingletonPointer<LLContextStrings>::getInstance();
-    if (!cons)
-    {
-        LLThreadLocalSingletonPointer<LLContextStrings>::setInstance(new LLContextStrings);
-    }
-    return LLThreadLocalSingletonPointer<LLContextStrings>::getInstance();
-}
-
-// static
-void LLContextStrings::addContextString(const std::string& str)
-{
-    LLContextStrings *cons = getThreadLocalInstance();
-    //LL_INFOS() << "CTX " << (S32)cons << " ADD " << str << " CNT " << cons->m_contextStrings[str] << LL_ENDL;
-    cons->m_contextStrings[str]++;
-}
-
-// static
-void LLContextStrings::removeContextString(const std::string& str)
-{
-    LLContextStrings *cons = getThreadLocalInstance();
-    cons->m_contextStrings[str]--;
-    //LL_INFOS() << "CTX " << (S32)cons << " REMOVE " << str << " CNT " << cons->m_contextStrings[str] << LL_ENDL;
-    if (cons->m_contextStrings[str] == 0)
-    {
-        cons->m_contextStrings.erase(str);
-    }
-}
-
-// static
-bool LLContextStrings::contains(const std::string& str)
-{
-    const std::map<std::string,S32>& strings =
-        LLThreadLocalSingletonPointer<LLContextStrings>::getInstance()->m_contextStrings;
-    for (const std::map<std::string,S32>::value_type& str_pair : strings)
-    {
-        if (str_pair.first.find(str) != std::string::npos)
-        {
-            return true;
-        }
-    }
-    return false;
-}
-
-// static
-void LLContextStrings::output(std::ostream& os)
-{
-    const std::map<std::string,S32>& strings =
-        LLThreadLocalSingletonPointer<LLContextStrings>::getInstance()->m_contextStrings;
-    for (const std::map<std::string,S32>::value_type& str_pair : strings)
-    {
-        os << str_pair.first << "[" << str_pair.second << "]" << "\n";
-    }
-}
-
-// static
-std::ostream& operator<<(std::ostream& s, const LLContextStatus& context_status)
-{
-    LLThreadLocalSingletonPointer<LLContextStrings>::getInstance()->output(s);
-    return s;
-}
-
-bool LLContextStatus::contains(const std::string& str)
-{
-    return LLThreadLocalSingletonPointer<LLContextStrings>::getInstance()->contains(str);
-}
diff --git a/indra/llcommon/llcallstack.h b/indra/llcommon/llcallstack.h
deleted file mode 100644
index ad10a9dbf7..0000000000
--- a/indra/llcommon/llcallstack.h
+++ /dev/null
@@ -1,87 +0,0 @@
-/**
- * @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(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);
-
-#define dumpStack(tag)                          \
-    LL_DEBUGS(tag) << "STACK:\n"                \
-                   << "====================\n"  \
-                   << LLCallStack()             \
-                   << "===================="    \
-                   << LL_ENDL;
diff --git a/indra/llcommon/llcoros.h b/indra/llcommon/llcoros.h
index 369d65407e..c3820ae987 100644
--- a/indra/llcommon/llcoros.h
+++ b/indra/llcommon/llcoros.h
@@ -31,8 +31,9 @@
 
 #include "llexception.h"
 #include <boost/fiber/fss.hpp>
-#include <boost/fiber/future/promise.hpp>
 #include <boost/fiber/future/future.hpp>
+#include <boost/fiber/future/promise.hpp>
+#include <boost/fiber/recursive_mutex.hpp>
 #include "mutex.h"
 #include "llsingleton.h"
 #include "llinstancetracker.h"
@@ -307,6 +308,12 @@ public:
 
     // use mutex, lock, condition_variable suitable for coroutines
     using Mutex = boost::fibers::mutex;
+    using RMutex = boost::fibers::recursive_mutex;
+    // With C++17, LockType is deprecated: at this point we can directly
+    // declare 'std::unique_lock lk(some_mutex)' without explicitly stating
+    // the mutex type. Sadly, making LockType an alias template for
+    // std::unique_lock doesn't work the same way: Class Template Argument
+    // Deduction only works for class templates, not alias templates.
     using LockType = std::unique_lock<Mutex>;
     using cv_status = boost::fibers::cv_status;
     using ConditionVariable = boost::fibers::condition_variable;
diff --git a/indra/llcommon/lldate.cpp b/indra/llcommon/lldate.cpp
index c63c7012d1..b38864688d 100644
--- a/indra/llcommon/lldate.cpp
+++ b/indra/llcommon/lldate.cpp
@@ -41,20 +41,11 @@
 #include "llstring.h"
 #include "llfasttimer.h"
 
-static const F64 DATE_EPOCH = 0.0;
-
 static const F64 LL_APR_USEC_PER_SEC = 1000000.0;
     // should be APR_USEC_PER_SEC, but that relies on INT64_C which
     // isn't defined in glib under our build set up for some reason
 
 
-LLDate::LLDate() : mSecondsSinceEpoch(DATE_EPOCH)
-{}
-
-LLDate::LLDate(const LLDate& date) :
-    mSecondsSinceEpoch(date.mSecondsSinceEpoch)
-{}
-
 LLDate::LLDate(F64SecondsImplicit seconds_since_epoch) :
     mSecondsSinceEpoch(seconds_since_epoch.value())
 {}
diff --git a/indra/llcommon/lldate.h b/indra/llcommon/lldate.h
index 81f2dd0d1c..1a69a04232 100644
--- a/indra/llcommon/lldate.h
+++ b/indra/llcommon/lldate.h
@@ -43,16 +43,13 @@
  */
 class LL_COMMON_API LLDate
 {
+    static constexpr F64 DATE_EPOCH = 0.0;
 public:
     /**
      * @brief Construct a date equal to epoch.
      */
-    LLDate();
-
-    /**
-     * @brief Construct a date equal to the source date.
-     */
-    LLDate(const LLDate& date);
+    constexpr LLDate() : mSecondsSinceEpoch(DATE_EPOCH)
+    {}
 
     /**
      * @brief Construct a date from a seconds since epoch value.
diff --git a/indra/llcommon/lldoubledispatch.h b/indra/llcommon/lldoubledispatch.h
index c8c566205a..25039c3e9c 100644
--- a/indra/llcommon/lldoubledispatch.h
+++ b/indra/llcommon/lldoubledispatch.h
@@ -30,7 +30,6 @@
 #define LL_LLDOUBLEDISPATCH_H
 
 #include <list>
-#include <boost/shared_ptr.hpp>
 #include <boost/function.hpp>
 #include <boost/bind.hpp>
 #include <boost/ref.hpp>
diff --git a/indra/llcommon/llerror.cpp b/indra/llcommon/llerror.cpp
index fa24987d1c..ad35bc84f2 100644
--- a/indra/llcommon/llerror.cpp
+++ b/indra/llcommon/llerror.cpp
@@ -55,7 +55,7 @@
 #include "llsingleton.h"
 #include "llstl.h"
 #include "lltimer.h"
-#include <boost/fiber/recursive_mutex.hpp>
+#include "llprofiler.h"
 
 // On Mac, got:
 // #error "Boost.Stacktrace requires `_Unwind_Backtrace` function. Define
@@ -168,7 +168,7 @@ namespace {
         virtual void recordMessage(LLError::ELevel level,
                                     const std::string& message) override
         {
-            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING
+            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING;
             if (LLError::getAlwaysFlush())
             {
                 mFile << message << std::endl;
@@ -235,7 +235,7 @@ namespace {
         virtual void recordMessage(LLError::ELevel level,
                        const std::string& message) override
         {
-            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING
+            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING;
             // The default colors for error, warn and debug are now a bit more pastel
             // and easier to read on the default (black) terminal background but you
             // now have the option to set the color of each via an environment variables:
@@ -275,7 +275,7 @@ namespace {
 
         LL_FORCE_INLINE void writeANSI(const std::string& ansi_code, const std::string& message)
         {
-            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING
+            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING;
             static std::string s_ansi_bold = createBoldANSI();  // bold text
             static std::string s_ansi_reset = createResetANSI();  // reset
             // ANSI color code escape sequence, message, and reset in one fprintf call
@@ -312,7 +312,7 @@ namespace {
         virtual void recordMessage(LLError::ELevel level,
                                    const std::string& message) override
         {
-            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING
+            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING;
             mBuffer->addLine(message);
         }
 
@@ -339,7 +339,7 @@ namespace {
         virtual void recordMessage(LLError::ELevel level,
                                    const std::string& message) override
         {
-            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING
+            LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING;
             debugger_print(message);
         }
     };
@@ -507,7 +507,7 @@ namespace
         LLError::TimeFunction               mTimeFunction;
 
         Recorders                           mRecorders;
-        boost::fibers::recursive_mutex      mRecorderMutex;
+        LL_PROFILE_MUTEX_NAMED(LLCoros::RMutex, mRecorderMutex, "Log Recorders");
 
         int                                 mShouldLogCallCounter;
 
@@ -530,7 +530,6 @@ namespace
         mCrashFunction(NULL),
         mTimeFunction(NULL),
         mRecorders(),
-        mRecorderMutex(),
         mShouldLogCallCounter(0)
     {
     }
@@ -1045,7 +1044,7 @@ namespace LLError
             return;
         }
         SettingsConfigPtr s = Globals::getInstance()->getSettingsConfig();
-        std::unique_lock lock(s->mRecorderMutex);
+        std::unique_lock lock(s->mRecorderMutex); LL_PROFILE_MUTEX_LOCK(s->mRecorderMutex);
         s->mRecorders.push_back(recorder);
     }
 
@@ -1056,7 +1055,7 @@ namespace LLError
             return;
         }
         SettingsConfigPtr s = Globals::getInstance()->getSettingsConfig();
-        std::unique_lock lock(s->mRecorderMutex);
+        std::unique_lock lock(s->mRecorderMutex); LL_PROFILE_MUTEX_LOCK(s->mRecorderMutex);
         s->mRecorders.erase(std::remove(s->mRecorders.begin(), s->mRecorders.end(), recorder),
                             s->mRecorders.end());
     }
@@ -1105,7 +1104,7 @@ namespace LLError
     std::shared_ptr<RECORDER> findRecorder()
     {
         SettingsConfigPtr s = Globals::getInstance()->getSettingsConfig();
-        std::unique_lock lock(s->mRecorderMutex);
+        std::unique_lock lock(s->mRecorderMutex); LL_PROFILE_MUTEX_LOCK(s->mRecorderMutex);
         return findRecorderPos<RECORDER>(s).first;
     }
 
@@ -1116,7 +1115,7 @@ namespace LLError
     bool removeRecorder()
     {
         SettingsConfigPtr s = Globals::getInstance()->getSettingsConfig();
-        std::unique_lock lock(s->mRecorderMutex);
+        std::unique_lock lock(s->mRecorderMutex); LL_PROFILE_MUTEX_LOCK(s->mRecorderMutex);
         auto found = findRecorderPos<RECORDER>(s);
         if (found.first)
         {
@@ -1216,13 +1215,13 @@ namespace
 
     void writeToRecorders(const LLError::CallSite& site, const std::string& message)
     {
-        LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING
+        LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING;
         LLError::ELevel level = site.mLevel;
         SettingsConfigPtr s = Globals::getInstance()->getSettingsConfig();
 
         std::string escaped_message;
 
-        std::unique_lock lock(s->mRecorderMutex);
+        std::unique_lock lock(s->mRecorderMutex); LL_PROFILE_MUTEX_LOCK(s->mRecorderMutex);
         for (LLError::RecorderPtr& r : s->mRecorders)
         {
             if (!r->enabled())
@@ -1281,24 +1280,21 @@ namespace
 }
 
 namespace {
-    // We need a couple different mutexes, but we want to use the same mechanism
-    // for both. Make getMutex() a template function with different instances
-    // for different MutexDiscriminator values.
-    enum MutexDiscriminator
-    {
-        LOG_MUTEX,
-        STACKS_MUTEX
-    };
     // Some logging calls happen very early in processing -- so early that our
     // module-static variables aren't yet initialized. getMutex() wraps a
     // function-static LLMutex so that early calls can still have a valid
     // LLMutex instance.
-    template <MutexDiscriminator MTX>
-    LLMutex* getMutex()
+    auto getLogMutex()
     {
         // guaranteed to be initialized the first time control reaches here
-        static LLMutex sMutex;
-        return &sMutex;
+        static LL_PROFILE_MUTEX_NAMED(std::recursive_mutex, sLogMutex, "Log Mutex");
+        return &sLogMutex;
+    }
+    auto getStacksMutex()
+    {
+        // guaranteed to be initialized the first time control reaches here
+        static LL_PROFILE_MUTEX_NAMED(std::recursive_mutex, sStacksMutex, "Stacks Mutex");
+        return &sStacksMutex;
     }
 
     bool checkLevelMap(const LevelMap& map, const std::string& key,
@@ -1347,9 +1343,9 @@ namespace LLError
 
     bool Log::shouldLog(CallSite& site)
     {
-        LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING
-        LLMutexTrylock lock(getMutex<LOG_MUTEX>(), 5);
-        if (!lock.isLocked())
+        LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING;
+        std::unique_lock lock(*getLogMutex(), std::try_to_lock); LL_PROFILE_MUTEX_LOCK(*getLogMutex());
+        if (!lock)
         {
             return false;
         }
@@ -1392,9 +1388,9 @@ namespace LLError
 
     void Log::flush(const std::ostringstream& out, const CallSite& site)
     {
-        LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING
-        LLMutexTrylock lock(getMutex<LOG_MUTEX>(),5);
-        if (!lock.isLocked())
+        LL_PROFILE_ZONE_SCOPED_CATEGORY_LOGGING;
+        std::unique_lock lock(*getLogMutex(), std::try_to_lock); LL_PROFILE_MUTEX_LOCK(*getLogMutex());
+        if (!lock)
         {
             return;
         }
@@ -1524,8 +1520,8 @@ namespace LLError
     //static
     void LLCallStacks::push(const char* function, const int line)
     {
-        LLMutexTrylock lock(getMutex<STACKS_MUTEX>(), 5);
-        if (!lock.isLocked())
+        std::unique_lock lock(*getStacksMutex(), std::try_to_lock); LL_PROFILE_MUTEX_LOCK(*getStacksMutex());
+        if (!lock)
         {
             return;
         }
@@ -1549,8 +1545,8 @@ namespace LLError
     //static
     void LLCallStacks::end(const std::ostringstream& out)
     {
-        LLMutexTrylock lock(getMutex<STACKS_MUTEX>(), 5);
-        if (!lock.isLocked())
+        std::unique_lock lock(*getStacksMutex(), std::try_to_lock); LL_PROFILE_MUTEX_LOCK(*getStacksMutex());
+        if (!lock)
         {
             return;
         }
@@ -1566,8 +1562,8 @@ namespace LLError
     //static
     void LLCallStacks::print()
     {
-        LLMutexTrylock lock(getMutex<STACKS_MUTEX>(), 5);
-        if (!lock.isLocked())
+        std::unique_lock lock(*getStacksMutex(), std::try_to_lock); LL_PROFILE_MUTEX_LOCK(*getStacksMutex());
+        if (!lock)
         {
             return;
         }
@@ -1645,19 +1641,3 @@ namespace LLError
         sLocalizedOutOfMemoryWarning = message;
     }
 }
-
-void crashdriver(void (*callback)(int*))
-{
-    // The LLERROR_CRASH macro used to have inline code of the form:
-    //int* make_me_crash = NULL;
-    //*make_me_crash = 0;
-
-    // But compilers are getting smart enough to recognize that, so we must
-    // assign to an address supplied by a separate source file. We could do
-    // the assignment here in crashdriver() -- but then BugSplat would group
-    // all LL_ERRS() crashes as the fault of this one function, instead of
-    // identifying the specific LL_ERRS() source line. So instead, do the
-    // assignment in a lambda in the caller's source. We just provide the
-    // nullptr target.
-    callback(nullptr);
-}
diff --git a/indra/llcommon/llerror.h b/indra/llcommon/llerror.h
index 7353a36c5f..8a143ff30a 100644
--- a/indra/llcommon/llerror.h
+++ b/indra/llcommon/llerror.h
@@ -95,11 +95,6 @@ const int LL_ERR_NOERR = 0;
 #define LL_STATIC_ASSERT(func, msg) static_assert(func, msg)
 #define LL_BAD_TEMPLATE_INSTANTIATION(type, msg) static_assert(false, msg)
 #else
-#if LL_LINUX
-// We need access to raise and SIGSEGV
-#include <signal.h>
-#endif
-
 #define LL_STATIC_ASSERT(func, msg) BOOST_STATIC_ASSERT(func)
 #define LL_BAD_TEMPLATE_INSTANTIATION(type, msg) BOOST_STATIC_ASSERT(sizeof(type) != 0 && false);
 #endif
@@ -413,16 +408,12 @@ typedef LLError::NoClassInfo _LL_CLASS_TO_LOG;
 #define LL_NEWLINE '\n'
 
 // Use this only in LL_ERRS or in a place that LL_ERRS may not be used
-
-#ifndef LL_LINUX
-#define LLERROR_CRASH                                   \
-{                                                       \
-    crashdriver([](int* ptr){ *ptr = 0; exit(*ptr); }); \
+#define LLERROR_CRASH                                \
+{                                                    \
+    int* make_me_crash = (int*)0xDEADBEEFDEADBEEFUL; \
+    *make_me_crash = 0;                              \
+    exit(*make_me_crash);                            \
 }
-#else
-// For Linux we just call raise and be done with it. No fighting the compiler to create a crashing code snippet.
-#define LLERROR_CRASH raise(SIGSEGV );
-#endif
 
 #define LL_ENDL                                         \
             LLError::End();                             \
@@ -523,7 +514,4 @@ LL_DEBUGS("SomeTag") performs the locking and map-searching ONCE, then caches
 the result in a static variable.
 */
 
-// used by LLERROR_CRASH
-void crashdriver(void (*)(int*));
-
 #endif // LL_LLERROR_H
diff --git a/indra/llcommon/llerrorcontrol.h b/indra/llcommon/llerrorcontrol.h
index cbb703e9e7..0a7b3d2046 100644
--- a/indra/llcommon/llerrorcontrol.h
+++ b/indra/llcommon/llerrorcontrol.h
@@ -32,7 +32,6 @@
 #include "llpointer.h"
 #include "llrefcount.h"
 #include "boost/function.hpp"
-#include "boost/shared_ptr.hpp"
 #include <string>
 
 class LLSD;
@@ -190,7 +189,7 @@ namespace LLError
         {}
         void recordMessage(LLError::ELevel level, const std::string& message) override
         {
-            LL_PROFILE_ZONE_SCOPED
+            LL_PROFILE_ZONE_SCOPED;
             mCallable(level, message);
         }
     private:
diff --git a/indra/llcommon/lleventfilter.h b/indra/llcommon/lleventfilter.h
index 5c45144fad..d8c7e15a27 100644
--- a/indra/llcommon/lleventfilter.h
+++ b/indra/llcommon/lleventfilter.h
@@ -429,7 +429,7 @@ public:
     // path, then stores it to mTarget.
     virtual bool post(const LLSD& event)
     {
-        LL_PROFILE_ZONE_SCOPED
+        LL_PROFILE_ZONE_SCOPED;
 
         // Extract the element specified by 'mPath' from 'event'. To perform a
         // generic type-appropriate store through mTarget, construct an
diff --git a/indra/llcommon/llevents.h b/indra/llcommon/llevents.h
index f97fca0a32..4bf1fa07a2 100644
--- a/indra/llcommon/llevents.h
+++ b/indra/llcommon/llevents.h
@@ -38,16 +38,8 @@
 #include <vector>
 #include <deque>
 #include <functional>
-#if LL_WINDOWS
-    #pragma warning (push)
-    #pragma warning (disable : 4263) // boost::signals2::expired_slot::what() has const mismatch
-    #pragma warning (disable : 4264)
-#endif
-#include <boost/signals2.hpp>
-#if LL_WINDOWS
-    #pragma warning (pop)
-#endif
 
+#include <boost/signals2.hpp>
 #include <boost/bind.hpp>
 #include <boost/utility.hpp>        // noncopyable
 #include <boost/optional/optional.hpp>
diff --git a/indra/llcommon/llfile.cpp b/indra/llcommon/llfile.cpp
index ddf239f306..ed94ef21ef 100644
--- a/indra/llcommon/llfile.cpp
+++ b/indra/llcommon/llfile.cpp
@@ -248,6 +248,24 @@ int LLFile::close(LLFILE * file)
     return ret_value;
 }
 
+std::string LLFile::getContents(const std::string& filename)
+{
+    LLFILE* fp = fopen(filename, "rb"); /* Flawfinder: ignore */
+    if (fp)
+    {
+        fseek(fp, 0, SEEK_END);
+        U32 length = ftell(fp);
+        fseek(fp, 0, SEEK_SET);
+
+        std::vector<char> buffer(length);
+        size_t nread = fread(buffer.data(), 1, length, fp);
+        fclose(fp);
+
+        return std::string(buffer.data(), nread);
+    }
+
+    return LLStringUtil::null;
+}
 
 int LLFile::remove(const std::string& filename, int supress_error)
 {
@@ -275,7 +293,7 @@ int LLFile::rename(const std::string& filename, const std::string& newname, int
     return warnif(STRINGIZE("rename to '" << newname << "' from"), filename, rc, supress_error);
 }
 
-bool LLFile::copy(const std::string from, const std::string to)
+bool LLFile::copy(const std::string& from, const std::string& to)
 {
     bool copied = false;
     LLFILE* in = LLFile::fopen(from, "rb");     /* Flawfinder: ignore */
@@ -406,7 +424,7 @@ LLFILE *    LLFile::_Fiopen(const std::string& filename,
 
     if (valid[n] == 0)
         return (0); // no valid mode
-    else if (norepflag && mode & (ios_base::out || ios_base::app)
+    else if (norepflag && mode & (ios_base::out | ios_base::app)
         && (fp = LLFile::fopen(filename, "r")) != 0)    /* Flawfinder: ignore */
         {   // file must not exist, close and fail
         fclose(fp);
diff --git a/indra/llcommon/llfile.h b/indra/llcommon/llfile.h
index 2564671b13..1661cbeb55 100644
--- a/indra/llcommon/llfile.h
+++ b/indra/llcommon/llfile.h
@@ -67,6 +67,8 @@ public:
 
     static  int     close(LLFILE * file);
 
+    static std::string getContents(const std::string& filename);
+
     // perms is a permissions mask like 0777 or 0700.  In most cases it will
     // be overridden by the user's umask.  It is ignored on Windows.
     // mkdir() considers "directory already exists" to be SUCCESS.
@@ -75,7 +77,7 @@ public:
     static  int     rmdir(const std::string& filename);
     static  int     remove(const std::string& filename, int supress_error = 0);
     static  int     rename(const std::string& filename,const std::string& newname, int supress_error = 0);
-    static  bool    copy(const std::string from, const std::string to);
+    static  bool    copy(const std::string& from, const std::string& to);
 
     static  int     stat(const std::string& filename,llstat*    file_status);
     static  bool    isdir(const std::string&    filename);
@@ -158,7 +160,7 @@ private:
  *  Does The Right Thing when passed a non-ASCII pathname. Sadly, that isn't
  *  true of Microsoft's std::ifstream.
  */
-class LL_COMMON_API llifstream  :   public  std::ifstream
+class LL_COMMON_API llifstream : public std::ifstream
 {
     // input stream associated with a C stream
   public:
@@ -203,7 +205,7 @@ class LL_COMMON_API llifstream  :   public  std::ifstream
  *  Right Thing when passed a non-ASCII pathname. Sadly, that isn't true of
  *  Microsoft's std::ofstream.
 */
-class LL_COMMON_API llofstream  :   public  std::ofstream
+class LL_COMMON_API llofstream : public std::ofstream
 {
   public:
     // Constructors:
@@ -239,7 +241,7 @@ class LL_COMMON_API llofstream  :   public  std::ofstream
 
 
 /**
- * @breif filesize helpers.
+ * @brief filesize helpers.
  *
  * The file size helpers are not considered particularly efficient,
  * and should only be used for config files and the like -- not in a
diff --git a/indra/llcommon/llfindlocale.cpp b/indra/llcommon/llfindlocale.cpp
index ac52f90c9f..b4bcc80ac4 100644
--- a/indra/llcommon/llfindlocale.cpp
+++ b/indra/llcommon/llfindlocale.cpp
@@ -185,7 +185,7 @@ canonise_fl(FL_Locale *l) {
 #define RML(pn,sn) MAKELANGID(LANG_##pn, SUBLANG_##sn)
 struct IDToCode {
   LANGID id;
-  char*  code;
+  const char*  code;
 };
 static const IDToCode both_to_code[] = {
   {ML(ENGLISH,US),           "en_US.ISO_8859-1"},
diff --git a/indra/llcommon/llinitparam.h b/indra/llcommon/llinitparam.h
index 206aa51ba3..32d7b17034 100644
--- a/indra/llcommon/llinitparam.h
+++ b/indra/llcommon/llinitparam.h
@@ -31,7 +31,6 @@
 #include <vector>
 #include <list>
 #include <boost/function.hpp>
-#include <boost/shared_ptr.hpp>
 #include <boost/type_traits/is_convertible.hpp>
 #include <boost/type_traits/is_enum.hpp>
 #include <boost/unordered_map.hpp>
diff --git a/indra/llcommon/llinstancetracker.h b/indra/llcommon/llinstancetracker.h
index 3232a0e219..92b26354a1 100644
--- a/indra/llcommon/llinstancetracker.h
+++ b/indra/llcommon/llinstancetracker.h
@@ -52,7 +52,7 @@ namespace LLInstanceTrackerPrivate
     struct StaticBase
     {
         // We need to be able to lock static data while manipulating it.
-        std::mutex mMutex;
+        LL_PROFILE_MUTEX_NAMED(std::mutex, mMutex, "InstanceTracker Data");
     };
 
     void logerrs(const char* cls, const std::string&, const std::string&, const std::string&);
@@ -101,7 +101,8 @@ public:
 
     static size_t instanceCount()
     {
-        return LockStatic()->mMap.size();
+        LockStatic lock; LL_PROFILE_MUTEX_LOCK(lock->mMutex);
+        return lock->mMap.size();
     }
 
     // snapshot of std::pair<const KEY, std::shared_ptr<SUBCLASS>> pairs, for
@@ -236,7 +237,7 @@ public:
 
     static ptr_t getInstance(const KEY& k)
     {
-        LockStatic lock;
+        LockStatic lock; LL_PROFILE_MUTEX_LOCK(lock->mMutex);
         const InstanceMap& map(lock->mMap);
         typename InstanceMap::const_iterator found = map.find(k);
         return (found == map.end()) ? NULL : found->second;
@@ -252,19 +253,19 @@ protected:
         ptr_t ptr(static_cast<T*>(this), [](T*){});
         // save corresponding weak_ptr for future reference
         mSelf = ptr;
-        LockStatic lock;
+        LockStatic lock; LL_PROFILE_MUTEX_LOCK(lock->mMutex);
         add_(lock, key, ptr);
     }
 public:
     virtual ~LLInstanceTracker()
     {
-        LockStatic lock;
+        LockStatic lock; LL_PROFILE_MUTEX_LOCK(lock->mMutex);
         remove_(lock);
     }
 protected:
     virtual void setKey(KEY key)
     {
-        LockStatic lock;
+        LockStatic lock; LL_PROFILE_MUTEX_LOCK(lock->mMutex);
         // Even though the shared_ptr we store in our map has a no-op deleter
         // for T itself, letting the use count decrement to 0 will still
         // delete the use-count object. Capture the shared_ptr we just removed
@@ -376,7 +377,8 @@ public:
 
     static size_t instanceCount()
     {
-        return LockStatic()->mSet.size();
+        LockStatic lock; LL_PROFILE_MUTEX_LOCK(lock->mMutex);
+        return lock->mSet.size();
     }
 
     // snapshot of std::shared_ptr<SUBCLASS> pointers
@@ -488,14 +490,16 @@ protected:
         // save corresponding weak_ptr for future reference
         mSelf = ptr;
         // Also store it in our class-static set to track this instance.
-        LockStatic()->mSet.emplace(ptr);
+        LockStatic lock; LL_PROFILE_MUTEX_LOCK(lock->mMutex);
+        lock->mSet.emplace(ptr);
     }
 public:
     virtual ~LLInstanceTracker()
     {
         // convert weak_ptr to shared_ptr because that's what we store in our
         // InstanceSet
-        LockStatic()->mSet.erase(mSelf.lock());
+        LockStatic lock; LL_PROFILE_MUTEX_LOCK(lock->mMutex);
+        lock->mSet.erase(mSelf.lock());
     }
 protected:
     LLInstanceTracker(const LLInstanceTracker& other):
diff --git a/indra/llcommon/llmemory.cpp b/indra/llcommon/llmemory.cpp
index 4b7d60d654..ba48319a16 100644
--- a/indra/llcommon/llmemory.cpp
+++ b/indra/llcommon/llmemory.cpp
@@ -39,6 +39,7 @@
 #elif LL_LINUX
 # include <unistd.h>
 # include <sys/resource.h>
+# include <sys/sysinfo.h>
 #endif
 
 #include "llmemory.h"
@@ -50,13 +51,28 @@
 //----------------------------------------------------------------------------
 
 //static
+
+// most important memory metric for texture streaming
+//  On Windows, this should agree with resource monitor -> performance -> memory -> available
+//  On OS X, this should be activity monitor -> memory -> (physical memory - memory used)
+// NOTE: this number MAY be less than the actual available memory on systems with more than MaxHeapSize64 GB of physical memory (default 16GB)
+//  In that case, should report min(available, sMaxHeapSizeInKB-sAllocateMemInKB)
 U32Kilobytes LLMemory::sAvailPhysicalMemInKB(U32_MAX);
+
+// Installed physical memory
 U32Kilobytes LLMemory::sMaxPhysicalMemInKB(0);
-static LLTrace::SampleStatHandle<F64Megabytes> sAllocatedMem("allocated_mem", "active memory in use by application");
-static LLTrace::SampleStatHandle<F64Megabytes> sVirtualMem("virtual_mem", "virtual memory assigned to application");
+
+// Maximimum heap size according to the user's settings (default 16GB)
+U32Kilobytes LLMemory::sMaxHeapSizeInKB(U32_MAX);
+
+// Current memory usage
 U32Kilobytes LLMemory::sAllocatedMemInKB(0);
+
 U32Kilobytes LLMemory::sAllocatedPageSizeInKB(0);
-U32Kilobytes LLMemory::sMaxHeapSizeInKB(U32_MAX);
+
+
+static LLTrace::SampleStatHandle<F64Megabytes> sAllocatedMem("allocated_mem", "active memory in use by application");
+static LLTrace::SampleStatHandle<F64Megabytes> sVirtualMem("virtual_mem", "virtual memory assigned to application");
 
 void ll_assert_aligned_func(uintptr_t ptr,U32 alignment)
 {
@@ -84,7 +100,14 @@ void LLMemory::initMaxHeapSizeGB(F32Gigabytes max_heap_size)
 //static
 void LLMemory::updateMemoryInfo()
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
+
+    sMaxPhysicalMemInKB = gSysMemory.getPhysicalMemoryKB();
+
+    U32Kilobytes avail_mem;
+    LLMemoryInfo::getAvailableMemoryKB(avail_mem);
+    sAvailPhysicalMemInKB = avail_mem;
+
 #if LL_WINDOWS
     PROCESS_MEMORY_COUNTERS counters;
 
@@ -95,23 +118,9 @@ void LLMemory::updateMemoryInfo()
     }
 
     sAllocatedMemInKB = U32Kilobytes::convert(U64Bytes(counters.WorkingSetSize));
-    sample(sAllocatedMem, sAllocatedMemInKB);
     sAllocatedPageSizeInKB = U32Kilobytes::convert(U64Bytes(counters.PagefileUsage));
     sample(sVirtualMem, sAllocatedPageSizeInKB);
 
-    U32Kilobytes avail_phys, avail_virtual;
-    LLMemoryInfo::getAvailableMemoryKB(avail_phys, avail_virtual) ;
-    sMaxPhysicalMemInKB = llmin(avail_phys + sAllocatedMemInKB, sMaxHeapSizeInKB);
-
-    if(sMaxPhysicalMemInKB > sAllocatedMemInKB)
-    {
-        sAvailPhysicalMemInKB = sMaxPhysicalMemInKB - sAllocatedMemInKB ;
-    }
-    else
-    {
-        sAvailPhysicalMemInKB = U32Kilobytes(0);
-    }
-
 #elif defined(LL_DARWIN)
     task_vm_info info;
     mach_msg_type_number_t  infoCount = TASK_VM_INFO_COUNT;
@@ -120,7 +129,7 @@ void LLMemory::updateMemoryInfo()
     {
         // Our Windows definition of PagefileUsage is documented by Microsoft as "the total amount of
         // memory that the memory manager has committed for a running process", which is rss.
-        sAllocatedPageSizeInKB = U32Bytes(info.resident_size);
+        sAllocatedPageSizeInKB = U32Kilobytes::convert(U64Bytes(info.resident_size));
 
         // Activity Monitor => Inspect Process => Real Memory Size appears to report resident_size
         // Activity monitor => main window memory column appears to report phys_footprint, which spot checks as at least 30% less.
@@ -130,37 +139,25 @@ void LLMemory::updateMemoryInfo()
         // reported for the app by the Memory Monitor in Instruments.' It is still about 8% bigger than phys_footprint.
         //
         // (On Windows, we use WorkingSetSize.)
-        sAllocatedMemInKB = U32Bytes(info.resident_size - info.reusable);
+        sAllocatedMemInKB = U32Kilobytes::convert(U64Bytes(info.resident_size - info.reusable));
      }
     else
     {
         LL_WARNS() << "task_info failed" << LL_ENDL;
     }
-
-    // Total installed and available physical memory are properties of the host, not just our process.
-    vm_statistics64_data_t vmstat;
-    mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
-    mach_port_t host = mach_host_self();
-    vm_size_t page_size;
-    host_page_size(host, &page_size);
-    kern_return_t result = host_statistics64(host, HOST_VM_INFO64, reinterpret_cast<host_info_t>(&vmstat), &count);
-    if (result == KERN_SUCCESS) {
-        // This is what Chrome reports as 'the "Physical Memory Free" value reported by the Memory Monitor in Instruments.'
-        // Note though that inactive pages are not included here and not yet free, but could become so under memory pressure.
-        sAvailPhysicalMemInKB = U32Bytes(vmstat.free_count * page_size);
-        sMaxPhysicalMemInKB = LLMemoryInfo::getHardwareMemSize();
-      }
-    else
-    {
-        LL_WARNS() << "task_info failed" << LL_ENDL;
-    }
-
+#elif defined(LL_LINUX)
+    // Use sysinfo() to get the total physical memory.
+    struct sysinfo info;
+    sysinfo(&info);
+    sAllocatedMemInKB = U32Kilobytes::convert(U64Bytes(LLMemory::getCurrentRSS())); // represents the RAM allocated by this process only (in line with the windows implementation)
 #else
     //not valid for other systems for now.
+    LL_WARNS() << "LLMemory::updateMemoryInfo() not implemented for this platform." << LL_ENDL;
     sAllocatedMemInKB = U64Bytes(LLMemory::getCurrentRSS());
-    sMaxPhysicalMemInKB = U64Bytes(U32_MAX);
-    sAvailPhysicalMemInKB = U64Bytes(U32_MAX);
 #endif
+    sample(sAllocatedMem, sAllocatedMemInKB);
+
+    sAvailPhysicalMemInKB = llmin(sAvailPhysicalMemInKB, sMaxHeapSizeInKB - sAllocatedMemInKB);
 
     return ;
 }
@@ -192,16 +189,16 @@ void* LLMemory::tryToAlloc(void* address, U32 size)
 //static
 void LLMemory::logMemoryInfo(bool update)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
     if(update)
     {
         updateMemoryInfo() ;
     }
 
-    LL_INFOS() << "Current allocated physical memory(KB): " << sAllocatedMemInKB << LL_ENDL ;
-    LL_INFOS() << "Current allocated page size (KB): " << sAllocatedPageSizeInKB << LL_ENDL ;
-    LL_INFOS() << "Current available physical memory(KB): " << sAvailPhysicalMemInKB << LL_ENDL ;
-    LL_INFOS() << "Current max usable memory(KB): " << sMaxPhysicalMemInKB << LL_ENDL ;
+    LL_INFOS() << llformat("Current allocated physical memory: %.2f MB", sAllocatedMemInKB / 1024.0) << LL_ENDL;
+    LL_INFOS() << llformat("Current allocated page size: %.2f MB", sAllocatedPageSizeInKB / 1024.0) << LL_ENDL;
+    LL_INFOS() << llformat("Current available physical memory: %.2f MB", sAvailPhysicalMemInKB / 1024.0) << LL_ENDL;
+    LL_INFOS() << llformat("Current max usable memory: %.2f MB", sMaxPhysicalMemInKB / 1024.0) << LL_ENDL;
 }
 
 //static
diff --git a/indra/llcommon/llmutex.cpp b/indra/llcommon/llmutex.cpp
index 40c651d9c1..be1ae89a25 100644
--- a/indra/llcommon/llmutex.cpp
+++ b/indra/llcommon/llmutex.cpp
@@ -100,7 +100,7 @@ void LLMutex::unlock()
 
 bool LLMutex::isLocked()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     if (!mMutex.try_lock())
     {
         return true;
@@ -124,7 +124,7 @@ LLThread::id_t LLMutex::lockingThread() const
 
 bool LLMutex::trylock()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     if (isSelfLocked())
     { //redundant lock
         mCount++;
@@ -161,7 +161,7 @@ LLSharedMutex::LLSharedMutex()
 
 bool LLSharedMutex::isLocked() const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     std::lock_guard<std::mutex> lock(mLockMutex);
 
     return !mLockingThreads.empty();
@@ -169,7 +169,7 @@ bool LLSharedMutex::isLocked() const
 
 bool LLSharedMutex::isThreadLocked() const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     LLThread::id_t current_thread = LLThread::currentID();
     std::lock_guard<std::mutex> lock(mLockMutex);
 
@@ -179,7 +179,7 @@ bool LLSharedMutex::isThreadLocked() const
 
 void LLSharedMutex::lockShared()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     LLThread::id_t current_thread = LLThread::currentID();
 
     mLockMutex.lock();
@@ -204,7 +204,7 @@ void LLSharedMutex::lockShared()
 
 void LLSharedMutex::lockExclusive()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     LLThread::id_t current_thread = LLThread::currentID();
 
     mLockMutex.lock();
@@ -237,7 +237,7 @@ void LLSharedMutex::lockExclusive()
 
 bool LLSharedMutex::trylockShared()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     LLThread::id_t current_thread = LLThread::currentID();
     std::lock_guard<std::mutex> lock(mLockMutex);
 
@@ -260,7 +260,7 @@ bool LLSharedMutex::trylockShared()
 
 bool LLSharedMutex::trylockExclusive()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     LLThread::id_t current_thread = LLThread::currentID();
     std::lock_guard<std::mutex> lock(mLockMutex);
 
@@ -282,7 +282,7 @@ bool LLSharedMutex::trylockExclusive()
 
 void LLSharedMutex::unlockShared()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     LLThread::id_t current_thread = LLThread::currentID();
     std::lock_guard<std::mutex> lock(mLockMutex);
 
@@ -303,7 +303,7 @@ void LLSharedMutex::unlockShared()
 
 void LLSharedMutex::unlockExclusive()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     LLThread::id_t current_thread = LLThread::currentID();
     std::lock_guard<std::mutex> lock(mLockMutex);
 
@@ -338,20 +338,20 @@ LLCondition::~LLCondition()
 
 void LLCondition::wait()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     std::unique_lock< std::mutex > lock(mMutex);
     mCond.wait(lock);
 }
 
 void LLCondition::signal()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     mCond.notify_one();
 }
 
 void LLCondition::broadcast()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     mCond.notify_all();
 }
 
@@ -364,7 +364,7 @@ LLMutexTrylock::LLMutexTrylock(LLMutex* mutex)
     : mMutex(mutex),
     mLocked(false)
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     if (mMutex)
         mLocked = mMutex->trylock();
 }
@@ -373,7 +373,7 @@ LLMutexTrylock::LLMutexTrylock(LLMutex* mutex, U32 aTries, U32 delay_ms)
     : mMutex(mutex),
     mLocked(false)
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     if (!mMutex)
         return;
 
@@ -388,7 +388,7 @@ LLMutexTrylock::LLMutexTrylock(LLMutex* mutex, U32 aTries, U32 delay_ms)
 
 LLMutexTrylock::~LLMutexTrylock()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     if (mMutex && mLocked)
         mMutex->unlock();
 }
@@ -400,7 +400,7 @@ LLMutexTrylock::~LLMutexTrylock()
 //
 LLScopedLock::LLScopedLock(std::mutex* mutex) : mMutex(mutex)
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     if(mutex)
     {
         mutex->lock();
@@ -419,7 +419,7 @@ LLScopedLock::~LLScopedLock()
 
 void LLScopedLock::unlock()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     if(mLocked)
     {
         mMutex->unlock();
diff --git a/indra/llcommon/llpointer.h b/indra/llcommon/llpointer.h
index f5916f9d58..6edff9fa5e 100644
--- a/indra/llcommon/llpointer.h
+++ b/indra/llcommon/llpointer.h
@@ -46,8 +46,11 @@
 template <class Type> class LLPointer
 {
 public:
+    template<typename Subclass>
+    friend class LLPointer;
+
     LLPointer() :
-        mPointer(NULL)
+        mPointer(nullptr)
     {
     }
 
@@ -63,6 +66,12 @@ public:
         ref();
     }
 
+    LLPointer(LLPointer<Type>&& ptr) noexcept
+    {
+        mPointer = ptr.mPointer;
+        ptr.mPointer = nullptr;
+    }
+
     // Support conversion up the type hierarchy. See Item 45 in Effective C++, 3rd Ed.
     template<typename Subclass>
     LLPointer(const LLPointer<Subclass>& ptr) :
@@ -71,6 +80,13 @@ public:
         ref();
     }
 
+    template<typename Subclass>
+    LLPointer(LLPointer<Subclass>&& ptr) noexcept :
+        mPointer(ptr.get())
+    {
+        ptr.mPointer = nullptr;
+    }
+
     ~LLPointer()
     {
         unref();
@@ -82,11 +98,11 @@ public:
     const Type& operator*() const               { return *mPointer; }
     Type&   operator*()                         { return *mPointer; }
 
-    operator BOOL() const                       { return (mPointer != NULL); }
-    operator bool() const                       { return (mPointer != NULL); }
-    bool operator!() const                      { return (mPointer == NULL); }
-    bool isNull() const                         { return (mPointer == NULL); }
-    bool notNull() const                        { return (mPointer != NULL); }
+    operator BOOL() const                       { return (mPointer != nullptr); }
+    operator bool() const                       { return (mPointer != nullptr); }
+    bool operator!() const                      { return (mPointer == nullptr); }
+    bool isNull() const                         { return (mPointer == nullptr); }
+    bool notNull() const                        { return (mPointer != nullptr); }
 
     operator Type*() const                      { return mPointer; }
     bool operator !=(Type* ptr) const           { return (mPointer != ptr); }
@@ -107,6 +123,17 @@ public:
         return *this;
     }
 
+    LLPointer<Type>& operator =(LLPointer<Type>&& ptr)
+    {
+        if (mPointer != ptr.mPointer)
+        {
+            unref();
+            mPointer = ptr.mPointer;
+            ptr.mPointer = nullptr;
+        }
+        return *this;
+    }
+
     // support assignment up the type hierarchy. See Item 45 in Effective C++, 3rd Ed.
     template<typename Subclass>
     LLPointer<Type>& operator =(const LLPointer<Subclass>& ptr)
@@ -115,6 +142,18 @@ public:
         return *this;
     }
 
+    template<typename Subclass>
+    LLPointer<Type>& operator =(LLPointer<Subclass>&& ptr)
+    {
+        if (mPointer != ptr.mPointer)
+        {
+            unref();
+            mPointer = ptr.mPointer;
+            ptr.mPointer = nullptr;
+        }
+        return *this;
+    }
+
     // Just exchange the pointers, which will not change the reference counts.
     static void swap(LLPointer<Type>& a, LLPointer<Type>& b)
     {
@@ -141,9 +180,9 @@ protected:
         if (mPointer)
         {
             Type *temp = mPointer;
-            mPointer = NULL;
+            mPointer = nullptr;
             temp->unref();
-            if (mPointer != NULL)
+            if (mPointer != nullptr)
             {
                 LL_WARNS() << "Unreference did assignment to non-NULL because of destructor" << LL_ENDL;
                 unref();
@@ -168,9 +207,11 @@ protected:
 
 template <class Type> class LLConstPointer
 {
+    template<typename Subclass>
+    friend class LLConstPointer;
 public:
     LLConstPointer() :
-        mPointer(NULL)
+        mPointer(nullptr)
     {
     }
 
@@ -186,6 +227,12 @@ public:
         ref();
     }
 
+    LLConstPointer(LLConstPointer<Type>&& ptr) noexcept
+    {
+        mPointer = ptr.mPointer;
+        ptr.mPointer = nullptr;
+    }
+
     // support conversion up the type hierarchy.  See Item 45 in Effective C++, 3rd Ed.
     template<typename Subclass>
     LLConstPointer(const LLConstPointer<Subclass>& ptr) :
@@ -194,6 +241,13 @@ public:
         ref();
     }
 
+    template<typename Subclass>
+    LLConstPointer(LLConstPointer<Subclass>&& ptr) noexcept :
+        mPointer(ptr.get())
+    {
+        ptr.mPointer = nullptr;
+    }
+
     ~LLConstPointer()
     {
         unref();
@@ -203,11 +257,11 @@ public:
     const Type* operator->() const              { return mPointer; }
     const Type& operator*() const               { return *mPointer; }
 
-    operator BOOL() const                       { return (mPointer != NULL); }
-    operator bool() const                       { return (mPointer != NULL); }
-    bool operator!() const                      { return (mPointer == NULL); }
-    bool isNull() const                         { return (mPointer == NULL); }
-    bool notNull() const                        { return (mPointer != NULL); }
+    operator BOOL() const                       { return (mPointer != nullptr); }
+    operator bool() const                       { return (mPointer != nullptr); }
+    bool operator!() const                      { return (mPointer == nullptr); }
+    bool isNull() const                         { return (mPointer == nullptr); }
+    bool notNull() const                        { return (mPointer != nullptr); }
 
     operator const Type*() const                { return mPointer; }
     bool operator !=(const Type* ptr) const     { return (mPointer != ptr); }
@@ -239,6 +293,17 @@ public:
         return *this;
     }
 
+    LLConstPointer<Type>& operator =(LLConstPointer<Type>&& ptr)
+    {
+        if (mPointer != ptr.mPointer)
+        {
+            unref();
+            mPointer = ptr.mPointer;
+            ptr.mPointer = nullptr;
+        }
+        return *this;
+    }
+
     // support assignment up the type hierarchy. See Item 45 in Effective C++, 3rd Ed.
     template<typename Subclass>
     LLConstPointer<Type>& operator =(const LLConstPointer<Subclass>& ptr)
@@ -252,6 +317,18 @@ public:
         return *this;
     }
 
+    template<typename Subclass>
+    LLConstPointer<Type>& operator =(LLConstPointer<Subclass>&& ptr)
+    {
+        if (mPointer != ptr.mPointer)
+        {
+            unref();
+            mPointer = ptr.mPointer;
+            ptr.mPointer = nullptr;
+        }
+        return *this;
+    }
+
     // Just exchange the pointers, which will not change the reference counts.
     static void swap(LLConstPointer<Type>& a, LLConstPointer<Type>& b)
     {
@@ -278,9 +355,9 @@ protected:
         if (mPointer)
         {
             const Type *temp = mPointer;
-            mPointer = NULL;
+            mPointer = nullptr;
             temp->unref();
-            if (mPointer != NULL)
+            if (mPointer != nullptr)
             {
                 LL_WARNS() << "Unreference did assignment to non-NULL because of destructor" << LL_ENDL;
                 unref();
@@ -313,7 +390,7 @@ public:
     :   LLPointer<Type>(ptr),
         mStayUnique(false)
     {
-        if (ptr.mForceUnique)
+        if (ptr.mStayUnique)
         {
             makeUnique();
         }
diff --git a/indra/llcommon/llpreprocessor.h b/indra/llcommon/llpreprocessor.h
index 13beb25558..b2378875c3 100644
--- a/indra/llcommon/llpreprocessor.h
+++ b/indra/llcommon/llpreprocessor.h
@@ -76,9 +76,6 @@
     #ifndef LL_MSVC
         #define LL_MSVC 1
     #endif
-    #if _MSC_VER < 1400
-        #define LL_MSVC7 //Visual C++ 2003 or earlier
-    #endif
 #endif
 
 // Deal with minor differences on Unixy OSes.
@@ -132,8 +129,6 @@
 #endif
 
 // level 4 warnings that we need to disable:
-#pragma warning (disable : 4244) // possible loss of data on conversions
-#pragma warning (disable : 4396) // the inline specifier cannot be used when a friend declaration refers to a specialization of a function template
 #pragma warning (disable : 4251) // member needs to have dll-interface to be used by clients of class
 #pragma warning (disable : 4275) // non dll-interface class used as base for dll-interface class
 #endif  //  LL_MSVC
diff --git a/indra/llcommon/llprocess.h b/indra/llcommon/llprocess.h
index 4e7451c4a1..e7caf1175c 100644
--- a/indra/llcommon/llprocess.h
+++ b/indra/llcommon/llprocess.h
@@ -32,7 +32,6 @@
 #include "llwin32headerslean.h"
 #include "llexception.h"
 #include "apr_thread_proc.h"
-#include <boost/shared_ptr.hpp>
 #include <boost/ptr_container/ptr_vector.hpp>
 #include <boost/optional.hpp>
 #include <boost/noncopyable.hpp>
diff --git a/indra/llcommon/llprofiler.cpp b/indra/llcommon/llprofiler.cpp
new file mode 100644
index 0000000000..bdddabf977
--- /dev/null
+++ b/indra/llcommon/llprofiler.cpp
@@ -0,0 +1,30 @@
+/**
+* @file llprofiler.cpp
+* @brief Implementation of llprofiler
+* @author Rye Cogtail
+*
+* $LicenseInfo:firstyear=2024&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2024, 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 "TracyClient.cpp"
diff --git a/indra/llcommon/llprofiler.h b/indra/llcommon/llprofiler.h
index 722d9afca2..f6a4d24747 100644
--- a/indra/llcommon/llprofiler.h
+++ b/indra/llcommon/llprofiler.h
@@ -78,13 +78,7 @@ extern thread_local bool gProfilerEnabled;
 
 #if defined(LL_PROFILER_CONFIGURATION) && (LL_PROFILER_CONFIGURATION > LL_PROFILER_CONFIG_NONE)
     #if LL_PROFILER_CONFIGURATION == LL_PROFILER_CONFIG_TRACY || LL_PROFILER_CONFIGURATION == LL_PROFILER_CONFIG_TRACY_FAST_TIMER
-        #define TRACY_ENABLE         1
-// Normally these would be enabled but we want to be able to build any viewer with Tracy enabled and run the Tracy server on another machine
-// They must be undefined in order to work across multiple machines
-//      #define TRACY_NO_BROADCAST   1
-//      #define TRACY_ONLY_LOCALHOST 1
-        #define TRACY_ONLY_IPV4      1
-        #include "Tracy.hpp"
+        #include "tracy/Tracy.hpp"
 
         // Enable OpenGL profiling
         #define LL_PROFILER_ENABLE_TRACY_OPENGL 0
@@ -108,6 +102,12 @@ extern thread_local bool gProfilerEnabled;
         #define LL_PROFILE_ZONE_ERR(name)               LL_PROFILE_ZONE_NAMED_COLOR( name, 0XFF0000  )  // RGB yellow
         #define LL_PROFILE_ZONE_INFO(name)              LL_PROFILE_ZONE_NAMED_COLOR( name, 0X00FFFF  )  // RGB cyan
         #define LL_PROFILE_ZONE_WARN(name)              LL_PROFILE_ZONE_NAMED_COLOR( name, 0x0FFFF00 )  // RGB red
+
+        #define LL_PROFILE_MUTEX(type, varname)                     TracyLockable(type, varname)
+        #define LL_PROFILE_MUTEX_NAMED(type, varname, desc)         TracyLockableN(type, varname, desc)
+        #define LL_PROFILE_MUTEX_SHARED(type, varname)              TracySharedLockable(type, varname)
+        #define LL_PROFILE_MUTEX_SHARED_NAMED(type, varname, desc)  TracySharedLockableN(type, varname, desc)
+        #define LL_PROFILE_MUTEX_LOCK(varname) { auto& mutex = varname; LockMark(mutex); }
     #endif
     #if LL_PROFILER_CONFIGURATION == LL_PROFILER_CONFIG_FAST_TIMER
         #define LL_PROFILER_FRAME_END
@@ -124,6 +124,12 @@ extern thread_local bool gProfilerEnabled;
         #define LL_PROFILE_ZONE_ERR(name)               (void)(name); // Not supported
         #define LL_PROFILE_ZONE_INFO(name)              (void)(name); // Not supported
         #define LL_PROFILE_ZONE_WARN(name)              (void)(name); // Not supported
+
+        #define LL_PROFILE_MUTEX(type, varname) type varname
+        #define LL_PROFILE_MUTEX_NAMED(type, varname, desc) type varname
+        #define LL_PROFILE_MUTEX_SHARED(type, varname) type varname
+        #define LL_PROFILE_MUTEX_SHARED_NAMED(type, varname, desc) type varname
+        #define LL_PROFILE_MUTEX_LOCK(varname) // LL_PROFILE_MUTEX_LOCK is a no-op when Tracy is disabled
     #endif
     #if LL_PROFILER_CONFIGURATION == LL_PROFILER_CONFIG_TRACY_FAST_TIMER
         #define LL_PROFILER_FRAME_END                   FrameMark
@@ -139,6 +145,12 @@ extern thread_local bool gProfilerEnabled;
         #define LL_PROFILE_ZONE_ERR(name)               LL_PROFILE_ZONE_NAMED_COLOR( name, 0XFF0000  )  // RGB yellow
         #define LL_PROFILE_ZONE_INFO(name)              LL_PROFILE_ZONE_NAMED_COLOR( name, 0X00FFFF  )  // RGB cyan
         #define LL_PROFILE_ZONE_WARN(name)              LL_PROFILE_ZONE_NAMED_COLOR( name, 0x0FFFF00 )  // RGB red
+
+        #define LL_PROFILE_MUTEX(type, varname)                     TracyLockable(type, varname)
+        #define LL_PROFILE_MUTEX_NAMED(type, varname, desc)         TracyLockableN(type, varname, desc)
+        #define LL_PROFILE_MUTEX_SHARED(type, varname)              TracySharedLockable(type, varname)
+        #define LL_PROFILE_MUTEX_SHARED_NAMED(type, varname, desc)  TracySharedLockableN(type, varname, desc)
+        #define LL_PROFILE_MUTEX_LOCK(varname) { auto& mutex = varname; LockMark(mutex); } // see https://github.com/wolfpld/tracy/issues/575
     #endif
 #else
     #define LL_PROFILER_FRAME_END
diff --git a/indra/llcommon/llqueuedthread.cpp b/indra/llcommon/llqueuedthread.cpp
index 7d77f6f6a9..1c4ac5a7bf 100644
--- a/indra/llcommon/llqueuedthread.cpp
+++ b/indra/llcommon/llqueuedthread.cpp
@@ -483,7 +483,7 @@ void LLQueuedThread::processRequest(LLQueuedThread::QueuedRequest* req)
 
                             if (sleep_time.count() > 0)
                             {
-                                ms_sleep(sleep_time.count());
+                                ms_sleep((U32)sleep_time.count());
                             }
                         }
                         processRequest(req);
diff --git a/indra/llcommon/llrand.cpp b/indra/llcommon/llrand.cpp
index 25d75af568..2c51e6f07f 100644
--- a/indra/llcommon/llrand.cpp
+++ b/indra/llcommon/llrand.cpp
@@ -85,7 +85,7 @@ inline F32 ll_internal_random<F32>()
     // Per Monty, it's important to clamp using the correct fmodf() rather
     // than expanding to F64 for fmod() and then truncating back to F32. Prior
     // to this change, we were getting sporadic ll_frand() == 1.0 results.
-    F32 rv{ narrow<F32>(gRandomGenerator()) };
+    F32 rv{ narrow<F64>(gRandomGenerator()) };
     if(!((rv >= 0.0f) && (rv < 1.0f))) return fmodf(rv, 1.0f);
     return rv;
 }
diff --git a/indra/llcommon/llrun.h b/indra/llcommon/llrun.h
index 8061117ad5..70767572ff 100644
--- a/indra/llcommon/llrun.h
+++ b/indra/llcommon/llrun.h
@@ -30,7 +30,6 @@
 #define LL_LLRUN_H
 
 #include <vector>
-#include <boost/shared_ptr.hpp>
 
 class LLRunnable;
 
diff --git a/indra/llcommon/llsd.cpp b/indra/llcommon/llsd.cpp
index 663ceac22b..77fe545c3f 100644
--- a/indra/llcommon/llsd.cpp
+++ b/indra/llcommon/llsd.cpp
@@ -30,6 +30,7 @@
 #include "linden_common.h"
 #include "llsd.h"
 
+#include "llbase64.h"
 #include "llerror.h"
 #include "../llmath/llmath.h"
 #include "llformat.h"
@@ -105,6 +106,9 @@ public:
     static void reset(Impl*& var, Impl* impl);
         ///< safely set var to refer to the new impl (possibly shared)
 
+    static void move(Impl*& var, Impl*& impl);
+        ///< safely move impl from one object to another
+
     static       Impl& safe(      Impl*);
     static const Impl& safe(const Impl*);
         ///< since a NULL Impl* is used for undefined, this ensures there is
@@ -122,11 +126,17 @@ public:
     virtual void assign(Impl*& var, LLSD::Boolean);
     virtual void assign(Impl*& var, LLSD::Integer);
     virtual void assign(Impl*& var, LLSD::Real);
+    virtual void assign(Impl*& var, const char*);
     virtual void assign(Impl*& var, const LLSD::String&);
     virtual void assign(Impl*& var, const LLSD::UUID&);
     virtual void assign(Impl*& var, const LLSD::Date&);
     virtual void assign(Impl*& var, const LLSD::URI&);
     virtual void assign(Impl*& var, const LLSD::Binary&);
+    virtual void assign(Impl*& var, LLSD::String&&);
+    virtual void assign(Impl*& var, LLSD::UUID&&);
+    virtual void assign(Impl*& var, LLSD::Date&&);
+    virtual void assign(Impl*& var, LLSD::URI&&);
+    virtual void assign(Impl*& var, LLSD::Binary&&);
         ///< If the receiver is the right type and unshared, these are simple
         //   data assignments, othewise the default implementation handless
         //   constructing the proper Impl subclass
@@ -142,11 +152,13 @@ public:
 
     virtual const String& asStringRef() const { static const std::string empty; return empty; }
 
-    virtual bool has(const String&) const       { return false; }
-    virtual LLSD get(const String&) const       { return LLSD(); }
+    virtual String asXMLRPCValue() const { return "<nil/>"; }
+
+    virtual bool has(std::string_view) const      { return false; }
+    virtual LLSD get(std::string_view) const      { return LLSD(); }
     virtual LLSD getKeys() const                { return LLSD::emptyArray(); }
     virtual void erase(const String&)           { }
-    virtual const LLSD& ref(const String&) const{ return undef(); }
+    virtual const LLSD& ref(std::string_view) const{ return undef(); }
 
     virtual size_t size() const                 { return 0; }
     virtual LLSD get(size_t) const              { return LLSD(); }
@@ -182,7 +194,7 @@ namespace LLSDUnnamedNamespace
 namespace
 #endif
 {
-    template<LLSD::Type T, class Data, class DataRef = Data>
+    template<LLSD::Type T, class Data, class DataRef = Data, class DataMove = Data>
     class ImplBase : public LLSD::Impl
         ///< This class handles most of the work for a subclass of Impl
         //   for a given simple data type.  Subclasses of this provide the
@@ -195,6 +207,7 @@ namespace
 
     public:
         ImplBase(DataRef value) : mValue(value) { }
+        ImplBase(DataMove value) : mValue(std::move(value)) { }
 
         virtual LLSD::Type type() const { return T; }
 
@@ -209,11 +222,21 @@ namespace
                 mValue = value;
             }
         }
+        virtual void assign(LLSD::Impl*& var, DataMove value) {
+            if (shared())
+            {
+                Impl::assign(var, std::move(value));
+            }
+            else
+            {
+                mValue = std::move(value);
+            }
+        }
     };
 
 
-    class ImplBoolean
-        : public ImplBase<LLSD::TypeBoolean, LLSD::Boolean>
+    class ImplBoolean final
+        : public ImplBase<LLSD::TypeBoolean, LLSD::Boolean, LLSD::Boolean, LLSD::Boolean&&>
     {
     public:
         ImplBoolean(LLSD::Boolean v) : Base(v) { }
@@ -222,6 +245,8 @@ namespace
         virtual LLSD::Integer   asInteger() const   { return mValue ? 1 : 0; }
         virtual LLSD::Real      asReal() const      { return mValue ? 1 : 0; }
         virtual LLSD::String    asString() const;
+
+        virtual LLSD::String asXMLRPCValue() const { return mValue ? "<boolean>1</boolean>" : "<boolean>0</boolean>"; }
     };
 
     LLSD::String ImplBoolean::asString() const
@@ -233,8 +258,8 @@ namespace
         { return mValue ? "true" : ""; }
 
 
-    class ImplInteger
-        : public ImplBase<LLSD::TypeInteger, LLSD::Integer>
+    class ImplInteger final
+        : public ImplBase<LLSD::TypeInteger, LLSD::Integer, LLSD::Integer, LLSD::Integer&&>
     {
     public:
         ImplInteger(LLSD::Integer v) : Base(v) { }
@@ -243,14 +268,16 @@ namespace
         virtual LLSD::Integer   asInteger() const   { return mValue; }
         virtual LLSD::Real      asReal() const      { return mValue; }
         virtual LLSD::String    asString() const;
+
+        virtual LLSD::String asXMLRPCValue() const { return "<int>" + std::to_string(mValue) + "</int>"; }
     };
 
     LLSD::String ImplInteger::asString() const
         { return llformat("%d", mValue); }
 
 
-    class ImplReal
-        : public ImplBase<LLSD::TypeReal, LLSD::Real>
+    class ImplReal final
+        : public ImplBase<LLSD::TypeReal, LLSD::Real, LLSD::Real, LLSD::Real&&>
     {
     public:
         ImplReal(LLSD::Real v) : Base(v) { }
@@ -259,6 +286,8 @@ namespace
         virtual LLSD::Integer   asInteger() const;
         virtual LLSD::Real      asReal() const      { return mValue; }
         virtual LLSD::String    asString() const;
+
+        virtual LLSD::String asXMLRPCValue() const { return "<double>" + std::to_string(mValue) + "</double>"; }
     };
 
     LLSD::Boolean ImplReal::asBoolean() const
@@ -271,11 +300,12 @@ namespace
         { return llformat("%lg", mValue); }
 
 
-    class ImplString
-        : public ImplBase<LLSD::TypeString, LLSD::String, const LLSD::String&>
+    class ImplString final
+        : public ImplBase<LLSD::TypeString, LLSD::String, const LLSD::String&, LLSD::String&&>
     {
     public:
         ImplString(const LLSD::String& v) : Base(v) { }
+        ImplString(LLSD::String&& v) : Base(std::move(v)) {}
 
         virtual LLSD::Boolean   asBoolean() const   { return !mValue.empty(); }
         virtual LLSD::Integer   asInteger() const;
@@ -286,9 +316,24 @@ namespace
         virtual LLSD::URI       asURI() const   { return LLURI(mValue); }
         virtual size_t          size() const    { return mValue.size(); }
         virtual const LLSD::String& asStringRef() const { return mValue; }
+
+        virtual LLSD::String asXMLRPCValue() const { return "<string>" + LLStringFn::xml_encode(mValue) + "</string>"; }
+
+        using LLSD::Impl::assign; // Unhiding base class virtuals...
+        virtual void assign(LLSD::Impl*& var, const char* value)
+        {
+            if (shared())
+            {
+                Impl::assign(var, value);
+            }
+            else
+            {
+                mValue = value;
+            }
+        }
     };
 
-    LLSD::Integer   ImplString::asInteger() const
+    LLSD::Integer ImplString::asInteger() const
     {
         // This must treat "1.23" not as an error, but as a number, which is
         // then truncated down to an integer.  Hence, this code doesn't call
@@ -298,7 +343,7 @@ namespace
         return (int)asReal();
     }
 
-    LLSD::Real      ImplString::asReal() const
+    LLSD::Real ImplString::asReal() const
     {
         F64 v = 0.0;
         std::istringstream i_stream(mValue);
@@ -315,25 +360,32 @@ namespace
     }
 
 
-    class ImplUUID
-        : public ImplBase<LLSD::TypeUUID, LLSD::UUID, const LLSD::UUID&>
+    class ImplUUID final
+        : public ImplBase<LLSD::TypeUUID, LLSD::UUID, const LLSD::UUID&, LLSD::UUID&&>
     {
     public:
         ImplUUID(const LLSD::UUID& v) : Base(v) { }
+        ImplUUID(LLSD::UUID&& v) : Base(std::move(v)) { }
 
         virtual LLSD::String    asString() const{ return mValue.asString(); }
         virtual LLSD::UUID      asUUID() const  { return mValue; }
+
+        virtual LLSD::String asXMLRPCValue() const { return "<string>" + mValue.asString() + "</string>"; }
     };
 
 
-    class ImplDate
-        : public ImplBase<LLSD::TypeDate, LLSD::Date, const LLSD::Date&>
+    class ImplDate final
+        : public ImplBase<LLSD::TypeDate, LLSD::Date, const LLSD::Date&, LLSD::Date&&>
     {
     public:
         ImplDate(const LLSD::Date& v)
-            : ImplBase<LLSD::TypeDate, LLSD::Date, const LLSD::Date&>(v)
+            : ImplBase(v)
             { }
 
+        ImplDate(LLSD::Date&& v)
+            : ImplBase(std::move(v))
+        { }
+
         virtual LLSD::Integer asInteger() const
         {
             return (LLSD::Integer)(mValue.secondsSinceEpoch());
@@ -344,34 +396,42 @@ namespace
         }
         virtual LLSD::String    asString() const{ return mValue.asString(); }
         virtual LLSD::Date      asDate() const  { return mValue; }
+
+        virtual LLSD::String asXMLRPCValue() const { return "<dateTime.iso8601>" + mValue.toHTTPDateString("%FT%T") + "</dateTime.iso8601>"; }
     };
 
 
-    class ImplURI
-        : public ImplBase<LLSD::TypeURI, LLSD::URI, const LLSD::URI&>
+    class ImplURI final
+        : public ImplBase<LLSD::TypeURI, LLSD::URI, const LLSD::URI&, LLSD::URI&&>
     {
     public:
         ImplURI(const LLSD::URI& v) : Base(v) { }
+        ImplURI(LLSD::URI&& v) : Base(std::move(v)) { }
 
         virtual LLSD::String    asString() const{ return mValue.asString(); }
         virtual LLSD::URI       asURI() const   { return mValue; }
+
+        virtual LLSD::String asXMLRPCValue() const { return "<string>" + LLStringFn::xml_encode(mValue.asString()) + "</string>"; }
     };
 
 
-    class ImplBinary
-        : public ImplBase<LLSD::TypeBinary, LLSD::Binary, const LLSD::Binary&>
+    class ImplBinary final
+        : public ImplBase<LLSD::TypeBinary, LLSD::Binary, const LLSD::Binary&, LLSD::Binary&&>
     {
     public:
         ImplBinary(const LLSD::Binary& v) : Base(v) { }
+        ImplBinary(LLSD::Binary&& v) : Base(std::move(v)) { }
 
         virtual const LLSD::Binary& asBinary() const{ return mValue; }
+
+        virtual LLSD::String asXMLRPCValue() const { return "<base64>" + LLBase64::encode(mValue.data(), mValue.size()) + "</base64>"; }
     };
 
 
-    class ImplMap : public LLSD::Impl
+    class ImplMap final : public LLSD::Impl
     {
     private:
-        typedef std::map<LLSD::String, LLSD>    DataMap;
+        typedef std::map<LLSD::String, LLSD, std::less<>> DataMap;
 
         DataMap mData;
 
@@ -387,17 +447,30 @@ namespace
 
         virtual LLSD::Boolean asBoolean() const { return !mData.empty(); }
 
-        virtual bool has(const LLSD::String&) const;
+        virtual LLSD::String asXMLRPCValue() const
+        {
+            std::ostringstream os;
+            os << "<struct>";
+            for (const auto& it : mData)
+            {
+                os << "<member><name>" << LLStringFn::xml_encode(it.first) << "</name>"
+                    << it.second.asXMLRPCValue() << "</member>";
+            }
+            os << "</struct>";
+            return os.str();
+        }
+
+        virtual bool has(std::string_view) const;
 
         using LLSD::Impl::get; // Unhiding get(size_t)
         using LLSD::Impl::erase; // Unhiding erase(size_t)
         using LLSD::Impl::ref; // Unhiding ref(size_t)
-        virtual LLSD get(const LLSD::String&) const;
+        virtual LLSD get(std::string_view) const;
         virtual LLSD getKeys() const;
-                void insert(const LLSD::String& k, const LLSD& v);
+        void insert(std::string_view k, const LLSD& v);
         virtual void erase(const LLSD::String&);
-                      LLSD& ref(const LLSD::String&);
-        virtual const LLSD& ref(const LLSD::String&) const;
+                      LLSD& ref(std::string_view);
+        virtual const LLSD& ref(std::string_view) const;
 
         virtual size_t size() const { return mData.size(); }
 
@@ -425,14 +498,14 @@ namespace
         }
     }
 
-    bool ImplMap::has(const LLSD::String& k) const
+    bool ImplMap::has(const std::string_view k) const
     {
         LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
         DataMap::const_iterator i = mData.find(k);
         return i != mData.end();
     }
 
-    LLSD ImplMap::get(const LLSD::String& k) const
+    LLSD ImplMap::get(const std::string_view k) const
     {
         LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
         DataMap::const_iterator i = mData.find(k);
@@ -452,10 +525,10 @@ namespace
         return keys;
     }
 
-    void ImplMap::insert(const LLSD::String& k, const LLSD& v)
+    void ImplMap::insert(std::string_view k, const LLSD& v)
     {
         LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
-        mData.insert(DataMap::value_type(k, v));
+        mData.emplace(k, v);
     }
 
     void ImplMap::erase(const LLSD::String& k)
@@ -464,15 +537,21 @@ namespace
         mData.erase(k);
     }
 
-    LLSD& ImplMap::ref(const LLSD::String& k)
+    LLSD& ImplMap::ref(std::string_view k)
     {
-        return mData[k];
+        DataMap::iterator i = mData.lower_bound(k);
+        if (i == mData.end() || mData.key_comp()(k, i->first))
+        {
+            return mData.emplace_hint(i, std::make_pair(k, LLSD()))->second;
+        }
+
+        return i->second;
     }
 
-    const LLSD& ImplMap::ref(const LLSD::String& k) const
+    const LLSD& ImplMap::ref(std::string_view k) const
     {
         DataMap::const_iterator i = mData.lower_bound(k);
-        if (i == mData.end()  ||  mData.key_comp()(k, i->first))
+        if (i == mData.end() || mData.key_comp()(k, i->first))
         {
             return undef();
         }
@@ -500,7 +579,7 @@ namespace
         {
             //std::cout << "  " << (*iter).first << ": " << (*iter).second << std::endl;
             Impl::calcStats((*iter).second, type_counts, share_counts);
-            iter++;
+            ++iter;
         }
 
         // Add in the values for this map
@@ -511,7 +590,7 @@ namespace
     class ImplArray : public LLSD::Impl
     {
     private:
-        typedef std::vector<LLSD>   DataVector;
+        typedef std::vector<LLSD> DataVector;
 
         DataVector mData;
 
@@ -527,6 +606,18 @@ namespace
 
         virtual LLSD::Boolean asBoolean() const { return !mData.empty(); }
 
+        virtual LLSD::String asXMLRPCValue() const
+        {
+            std::ostringstream os;
+            os << "<array><data>";
+            for (const auto& it : mData)
+            {
+                os << it.asXMLRPCValue();
+            }
+            os << "</data></array>";
+            return os.str();
+        }
+
         using LLSD::Impl::get; // Unhiding get(LLSD::String)
         using LLSD::Impl::erase; // Unhiding erase(LLSD::String)
         using LLSD::Impl::ref; // Unhiding ref(LLSD::String)
@@ -647,7 +738,7 @@ namespace
         while (iter != endArray())
         {   // Add values for all items held in the array
             Impl::calcStats((*iter), type_counts, share_counts);
-            iter++;
+            ++iter;
         }
 
         // Add in the values for this array
@@ -685,6 +776,16 @@ void LLSD::Impl::reset(Impl*& var, Impl* impl)
     var = impl;
 }
 
+void LLSD::Impl::move(Impl*& var, Impl*& impl)
+{
+    if (var && var->mUseCount != STATIC_USAGE_COUNT && --var->mUseCount == 0)
+    {
+        delete var; // destroy var if usage falls to 0 and not static
+    }
+    var = impl; // Steal impl to var without incrementing use since this is a move
+    impl = nullptr; // null out old-impl pointer
+}
+
 LLSD::Impl& LLSD::Impl::safe(Impl* impl)
 {
     static Impl theUndefined(STATIC_USAGE_COUNT);
@@ -738,6 +839,11 @@ void LLSD::Impl::assign(Impl*& var, LLSD::Real v)
     reset(var, new ImplReal(v));
 }
 
+void LLSD::Impl::assign(Impl*& var, const char* v)
+{
+    reset(var, new ImplString(v));
+}
+
 void LLSD::Impl::assign(Impl*& var, const LLSD::String& v)
 {
     reset(var, new ImplString(v));
@@ -763,6 +869,31 @@ void LLSD::Impl::assign(Impl*& var, const LLSD::Binary& v)
     reset(var, new ImplBinary(v));
 }
 
+void LLSD::Impl::assign(Impl*& var, LLSD::String&& v)
+{
+    reset(var, new ImplString(std::move(v)));
+}
+
+void LLSD::Impl::assign(Impl*& var, LLSD::UUID&& v)
+{
+    reset(var, new ImplUUID(std::move(v)));
+}
+
+void LLSD::Impl::assign(Impl*& var, LLSD::Date&& v)
+{
+    reset(var, new ImplDate(std::move(v)));
+}
+
+void LLSD::Impl::assign(Impl*& var, LLSD::URI&& v)
+{
+    reset(var, new ImplURI(std::move(v)));
+}
+
+void LLSD::Impl::assign(Impl*& var, LLSD::Binary&& v)
+{
+    reset(var, new ImplBinary(std::move(v)));
+}
+
 
 const LLSD& LLSD::Impl::undef()
 {
@@ -835,6 +966,9 @@ LLSD::~LLSD()                           { FREE_LLSD_OBJECT; Impl::reset(impl, 0)
 LLSD::LLSD(const LLSD& other) : impl(0) { ALLOC_LLSD_OBJECT;  assign(other); }
 void LLSD::assign(const LLSD& other)    { Impl::assign(impl, other.impl); }
 
+LLSD::LLSD(LLSD&& other) noexcept : impl(nullptr) { ALLOC_LLSD_OBJECT;  Impl::move(impl, other.impl); }
+void  LLSD::assign(LLSD&& other) { Impl::move(impl, other.impl); }
+LLSD& LLSD::operator=(LLSD&& other) noexcept { Impl::move(impl, other.impl); return *this; }
 
 void LLSD::clear()                      { Impl::assignUndefined(impl); }
 
@@ -849,6 +983,11 @@ LLSD::LLSD(const String& v) : impl(0)   { ALLOC_LLSD_OBJECT;    assign(v); }
 LLSD::LLSD(const Date& v) : impl(0)     { ALLOC_LLSD_OBJECT;    assign(v); }
 LLSD::LLSD(const URI& v) : impl(0)      { ALLOC_LLSD_OBJECT;    assign(v); }
 LLSD::LLSD(const Binary& v) : impl(0)   { ALLOC_LLSD_OBJECT;    assign(v); }
+LLSD::LLSD(UUID&& v) : impl(0)          { ALLOC_LLSD_OBJECT;    assign(std::move(v)); }
+LLSD::LLSD(String&& v) : impl(0)        { ALLOC_LLSD_OBJECT;    assign(std::move(v)); }
+LLSD::LLSD(Date&& v) : impl(0)          { ALLOC_LLSD_OBJECT;    assign(std::move(v)); }
+LLSD::LLSD(URI&& v) : impl(0)           { ALLOC_LLSD_OBJECT;    assign(std::move(v)); }
+LLSD::LLSD(Binary&& v) : impl(0)        { ALLOC_LLSD_OBJECT;    assign(std::move(v)); }
 
 // Scalar Assignment
 void LLSD::assign(Boolean v)            { safe(impl).assign(impl, v); }
@@ -859,6 +998,11 @@ void LLSD::assign(const UUID& v)        { safe(impl).assign(impl, v); }
 void LLSD::assign(const Date& v)        { safe(impl).assign(impl, v); }
 void LLSD::assign(const URI& v)         { safe(impl).assign(impl, v); }
 void LLSD::assign(const Binary& v)      { safe(impl).assign(impl, v); }
+void LLSD::assign(String&& v)           { safe(impl).assign(impl, std::move(v)); }
+void LLSD::assign(UUID&& v)             { safe(impl).assign(impl, std::move(v)); }
+void LLSD::assign(Date&& v)             { safe(impl).assign(impl, std::move(v)); }
+void LLSD::assign(URI&& v)              { safe(impl).assign(impl, std::move(v)); }
+void LLSD::assign(Binary&& v)           { safe(impl).assign(impl, std::move(v)); }
 
 // Scalar Accessors
 LLSD::Boolean   LLSD::asBoolean() const { return safe(impl).asBoolean(); }
@@ -872,11 +1016,13 @@ const LLSD::Binary& LLSD::asBinary() const  { return safe(impl).asBinary(); }
 
 const LLSD::String& LLSD::asStringRef() const { return safe(impl).asStringRef(); }
 
+LLSD::String LLSD::asXMLRPCValue() const { return "<value>" + safe(impl).asXMLRPCValue() + "</value>"; }
+
 // const char * helpers
 LLSD::LLSD(const char* v) : impl(0)     { ALLOC_LLSD_OBJECT;    assign(v); }
 void LLSD::assign(const char* v)
 {
-    if(v) assign(std::string(v));
+    if(v) safe(impl).assign(impl, v);
     else assign(std::string());
 }
 
@@ -888,24 +1034,24 @@ LLSD LLSD::emptyMap()
     return v;
 }
 
-bool LLSD::has(const String& k) const   { return safe(impl).has(k); }
-LLSD LLSD::get(const String& k) const   { return safe(impl).get(k); }
+bool LLSD::has(const std::string_view k) const  { return safe(impl).has(k); }
+LLSD LLSD::get(const std::string_view k) const  { return safe(impl).get(k); }
 LLSD LLSD::getKeys() const              { return safe(impl).getKeys(); }
-void LLSD::insert(const String& k, const LLSD& v) { makeMap(impl).insert(k, v); }
+void LLSD::insert(std::string_view k, const LLSD& v) { makeMap(impl).insert(k, v); }
 
-LLSD& LLSD::with(const String& k, const LLSD& v)
+LLSD& LLSD::with(std::string_view k, const LLSD& v)
                                         {
                                             makeMap(impl).insert(k, v);
                                             return *this;
                                         }
 void LLSD::erase(const String& k)       { makeMap(impl).erase(k); }
 
-LLSD& LLSD::operator[](const String& k)
+LLSD& LLSD::operator[](const std::string_view k)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
     return makeMap(impl).ref(k);
 }
-const LLSD& LLSD::operator[](const String& k) const
+const LLSD& LLSD::operator[](const std::string_view k) const
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
     return safe(impl).ref(k);
diff --git a/indra/llcommon/llsd.h b/indra/llcommon/llsd.h
index a5e735b561..d2b3548831 100644
--- a/indra/llcommon/llsd.h
+++ b/indra/llcommon/llsd.h
@@ -161,6 +161,13 @@ public:
 
     //@}
 
+    /** @name Movable */
+    //@{
+        LLSD(LLSD&& other) noexcept;
+        void  assign(LLSD&& other);
+        LLSD& operator=(LLSD&& other) noexcept;
+    //@}
+
     void clear();   ///< resets to Undefined
 
 
@@ -188,6 +195,11 @@ public:
         LLSD(const Date&);
         LLSD(const URI&);
         LLSD(const Binary&);
+        LLSD(String&&);
+        LLSD(UUID&&);
+        LLSD(Date&&);
+        LLSD(URI&&);
+        LLSD(Binary&&);
     //@}
 
     /** @name Convenience Constructors */
@@ -215,6 +227,11 @@ public:
         void assign(const Date&);
         void assign(const URI&);
         void assign(const Binary&);
+        void assign(String&&);
+        void assign(UUID&&);
+        void assign(Date&&);
+        void assign(URI&&);
+        void assign(Binary&&);
 
         LLSD& operator=(Boolean v)          { assign(v); return *this; }
         LLSD& operator=(Integer v)          { assign(v); return *this; }
@@ -224,6 +241,11 @@ public:
         LLSD& operator=(const Date& v)      { assign(v); return *this; }
         LLSD& operator=(const URI& v)       { assign(v); return *this; }
         LLSD& operator=(const Binary& v)    { assign(v); return *this; }
+        LLSD& operator=(String&& v)         { assign(std::move(v)); return *this; }
+        LLSD& operator=(UUID&& v)               { assign(std::move(v)); return *this; }
+        LLSD& operator=(Date&& v)               { assign(std::move(v)); return *this; }
+        LLSD& operator=(URI&& v)                { assign(std::move(v)); return *this; }
+        LLSD& operator=(Binary&& v)         { assign(std::move(v)); return *this; }
     //@}
 
     /**
@@ -259,10 +281,14 @@ public:
         UUID    asUUID() const;
         Date    asDate() const;
         URI     asURI() const;
-        const Binary&   asBinary() const;
+        const Binary& asBinary() const;
 
         // asStringRef on any non-string type will return a ref to an empty string.
-        const String&   asStringRef() const;
+        const String& asStringRef() const;
+
+        // Return "<value><((type))>((scalar value or recursive calls))</((type))></value>"
+        // See http://xmlrpc.com/spec.md
+        String asXMLRPCValue() const;
 
         operator Boolean() const    { return asBoolean(); }
         operator Integer() const    { return asInteger(); }
@@ -275,7 +301,7 @@ public:
 
         // This is needed because most platforms do not automatically
         // convert the boolean negation as a bool in an if statement.
-        bool operator!() const {return !asBoolean();}
+        bool operator!() const { return !asBoolean(); }
     //@}
 
     /** @name Character Pointer Helpers
@@ -292,24 +318,22 @@ public:
     //@{
         static LLSD emptyMap();
 
-        bool has(const String&) const;
-        LLSD get(const String&) const;
+        bool has(const std::string_view) const;
+        LLSD get(const std::string_view) const;
         LLSD getKeys() const;               // Return an LLSD array with keys as strings
-        void insert(const String&, const LLSD&);
+        void insert(std::string_view, const LLSD&);
         void erase(const String&);
-        LLSD& with(const String&, const LLSD&);
+        LLSD& with(std::string_view, const LLSD&);
 
-        LLSD& operator[](const String&);
+        LLSD& operator[](const std::string_view);
         LLSD& operator[](const char* c)
         {
-            LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
-            return (*this)[String(c)];
+            return c ? (*this)[std::string_view(c)] : *this;
         }
-        const LLSD& operator[](const String&) const;
+        const LLSD& operator[](const std::string_view) const;
         const LLSD& operator[](const char* c) const
         {
-            LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
-            return (*this)[String(c)];
+            return c ? (*this)[std::string_view(c)] : *this;
         }
     //@}
 
diff --git a/indra/llcommon/llsdjson.cpp b/indra/llcommon/llsdjson.cpp
index e95d2e6c1c..5d38e55686 100644
--- a/indra/llcommon/llsdjson.cpp
+++ b/indra/llcommon/llsdjson.cpp
@@ -35,16 +35,7 @@
 #include "llerror.h"
 #include "../llmath/llmath.h"
 
-#if LL_WINDOWS
-#pragma warning (push)
-#pragma warning (disable : 4702) // compiler thinks unreachable code
-#endif
 #include <boost/json/src.hpp>
-#if LL_WINDOWS
-#pragma warning (pop)
-#endif
-
-
 
 //=========================================================================
 LLSD LlsdFromJson(const boost::json::value& val)
diff --git a/indra/llcommon/llsdparam.cpp b/indra/llcommon/llsdparam.cpp
index b981be4d0a..3ae153a67c 100644
--- a/indra/llcommon/llsdparam.cpp
+++ b/indra/llcommon/llsdparam.cpp
@@ -149,7 +149,7 @@ bool LLParamSDParser::readF32(Parser& parser, void* val_ptr)
 {
     LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
 
-    *((F32*)val_ptr) = self.mCurReadSD->asReal();
+    *((F32*)val_ptr) = (F32)self.mCurReadSD->asReal();
     return true;
 }
 
diff --git a/indra/llcommon/llsdserialize.cpp b/indra/llcommon/llsdserialize.cpp
index 15002580c9..37af366a20 100644
--- a/indra/llcommon/llsdserialize.cpp
+++ b/indra/llcommon/llsdserialize.cpp
@@ -231,7 +231,7 @@ bool LLSDSerialize::deserialize(LLSD& sd, std::istream& str, llssize max_bytes)
         }
         // Since we've already read 'inbuf' bytes into 'hdr_buf', prepend that
         // data to whatever remains in 'str'.
-        LLMemoryStreamBuf already(reinterpret_cast<const U8*>(hdr_buf), inbuf);
+        LLMemoryStreamBuf already(reinterpret_cast<const U8*>(hdr_buf), (S32)inbuf);
         cat_streambuf prebuff(&already, str.rdbuf());
         std::istream  prepend(&prebuff);
 #if 1
@@ -475,7 +475,7 @@ LLSDNotationParser::~LLSDNotationParser()
 // virtual
 S32 LLSDNotationParser::doParse(std::istream& istr, LLSD& data, S32 max_depth) const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
     // map: { string:object, string:object }
     // array: [ object, object, object ]
     // undef: !
@@ -566,7 +566,7 @@ S32 LLSDNotationParser::doParse(std::istream& istr, LLSD& data, S32 max_depth) c
                 data,
                 NOTATION_FALSE_SERIAL,
                 false);
-            if(PARSE_FAILURE == cnt) parse_count = cnt;
+            if(PARSE_FAILURE == cnt) parse_count = (S32)cnt;
             else account(cnt);
         }
         else
@@ -592,7 +592,7 @@ S32 LLSDNotationParser::doParse(std::istream& istr, LLSD& data, S32 max_depth) c
         if(isalpha(c))
         {
             auto cnt = deserialize_boolean(istr,data,NOTATION_TRUE_SERIAL,true);
-            if(PARSE_FAILURE == cnt) parse_count = cnt;
+            if(PARSE_FAILURE == cnt) parse_count = (S32)cnt;
             else account(cnt);
         }
         else
@@ -735,7 +735,7 @@ S32 LLSDNotationParser::doParse(std::istream& istr, LLSD& data, S32 max_depth) c
 
 S32 LLSDNotationParser::parseMap(std::istream& istr, LLSD& map, S32 max_depth) const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
     // map: { string:object, string:object }
     map = LLSD::emptyMap();
     S32 parse_count = 0;
@@ -796,7 +796,7 @@ S32 LLSDNotationParser::parseMap(std::istream& istr, LLSD& map, S32 max_depth) c
 
 S32 LLSDNotationParser::parseArray(std::istream& istr, LLSD& array, S32 max_depth) const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
     // array: [ object, object, object ]
     array = LLSD::emptyArray();
     S32 parse_count = 0;
@@ -836,7 +836,7 @@ S32 LLSDNotationParser::parseArray(std::istream& istr, LLSD& array, S32 max_dept
 
 bool LLSDNotationParser::parseString(std::istream& istr, LLSD& data) const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
     std::string value;
     auto count = deserialize_string(istr, value, mMaxBytesLeft);
     if(PARSE_FAILURE == count) return false;
@@ -847,7 +847,7 @@ bool LLSDNotationParser::parseString(std::istream& istr, LLSD& data) const
 
 bool LLSDNotationParser::parseBinary(std::istream& istr, LLSD& data) const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
     // binary: b##"ff3120ab1"
     // or: b(len)"..."
 
@@ -950,7 +950,7 @@ LLSDBinaryParser::~LLSDBinaryParser()
 // virtual
 S32 LLSDBinaryParser::doParse(std::istream& istr, LLSD& data, S32 max_depth) const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
 /**
  * Undefined: '!'<br>
  * Boolean: '1' for true '0' for false<br>
diff --git a/indra/llcommon/llsdserialize_xml.cpp b/indra/llcommon/llsdserialize_xml.cpp
index 88cbb3b984..6396caf8d5 100644
--- a/indra/llcommon/llsdserialize_xml.cpp
+++ b/indra/llcommon/llsdserialize_xml.cpp
@@ -554,7 +554,7 @@ void LLSDXMLParser::Impl::parsePart(const char* buf, llssize len)
     if ( buf != NULL
         && len > 0 )
     {
-        XML_Status status = XML_Parse(mParser, buf, len, false);
+        XML_Status status = XML_Parse(mParser, buf, (int)len, 0);
         if (status == XML_STATUS_ERROR)
         {
             LL_INFOS() << "Unexpected XML parsing error at start" << LL_ENDL;
@@ -930,7 +930,7 @@ void LLSDXMLParser::parsePart(const char *buf, llssize len)
 // virtual
 S32 LLSDXMLParser::doParse(std::istream& input, LLSD& data, S32 max_depth) const
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_LLSD;
 
     #ifdef XML_PARSER_PERFORMANCE_TESTS
     XML_Timer timer( &parseTime );
diff --git a/indra/llcommon/llsdutil.cpp b/indra/llcommon/llsdutil.cpp
index 2d3d7d8b73..23ac52956d 100644
--- a/indra/llcommon/llsdutil.cpp
+++ b/indra/llcommon/llsdutil.cpp
@@ -51,7 +51,7 @@
 // U32
 LLSD ll_sd_from_U32(const U32 val)
 {
-    std::vector<U8> v;
+    LLSD::Binary v;
     U32 net_order = htonl(val);
 
     v.resize(4);
@@ -63,7 +63,7 @@ LLSD ll_sd_from_U32(const U32 val)
 U32 ll_U32_from_sd(const LLSD& sd)
 {
     U32 ret;
-    std::vector<U8> v = sd.asBinary();
+    const LLSD::Binary& v = sd.asBinary();
     if (v.size() < 4)
     {
         return 0;
@@ -76,7 +76,7 @@ U32 ll_U32_from_sd(const LLSD& sd)
 //U64
 LLSD ll_sd_from_U64(const U64 val)
 {
-    std::vector<U8> v;
+    LLSD::Binary v;
     U32 high, low;
 
     high = (U32)(val >> 32);
@@ -94,7 +94,7 @@ LLSD ll_sd_from_U64(const U64 val)
 U64 ll_U64_from_sd(const LLSD& sd)
 {
     U32 high, low;
-    std::vector<U8> v = sd.asBinary();
+    const LLSD::Binary& v = sd.asBinary();
 
     if (v.size() < 8)
     {
@@ -112,7 +112,7 @@ U64 ll_U64_from_sd(const LLSD& sd)
 // IP Address (stored in net order in a U32, so don't need swizzling)
 LLSD ll_sd_from_ipaddr(const U32 val)
 {
-    std::vector<U8> v;
+    LLSD::Binary v;
 
     v.resize(4);
     memcpy(&(v[0]), &val, 4);       /* Flawfinder: ignore */
@@ -123,7 +123,7 @@ LLSD ll_sd_from_ipaddr(const U32 val)
 U32 ll_ipaddr_from_sd(const LLSD& sd)
 {
     U32 ret;
-    std::vector<U8> v = sd.asBinary();
+    const LLSD::Binary& v = sd.asBinary();
     if (v.size() < 4)
     {
         return 0;
@@ -135,17 +135,17 @@ U32 ll_ipaddr_from_sd(const LLSD& sd)
 // Converts an LLSD binary to an LLSD string
 LLSD ll_string_from_binary(const LLSD& sd)
 {
-    std::vector<U8> value = sd.asBinary();
+    const LLSD::Binary& value = sd.asBinary();
     std::string str;
     str.resize(value.size());
-    memcpy(&str[0], &value[0], value.size());
+    memcpy(&str[0], value.data(), value.size());
     return str;
 }
 
 // Converts an LLSD string to an LLSD binary
 LLSD ll_binary_from_string(const LLSD& sd)
 {
-    std::vector<U8> binary_value;
+    LLSD::Binary binary_value;
 
     std::string string_value = sd.asString();
     for (const U8 c : string_value)
@@ -214,7 +214,7 @@ bool compare_llsd_with_template(
     const LLSD& template_llsd,
     LLSD& resultant_llsd)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 
     if (
         llsd_to_test.isUndefined() &&
@@ -337,7 +337,7 @@ bool filter_llsd_with_template(
     const LLSD & template_llsd,
     LLSD & resultant_llsd)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 
     if (llsd_to_test.isUndefined() && template_llsd.isDefined())
     {
@@ -533,7 +533,7 @@ class TypeLookup
 public:
     TypeLookup()
     {
-        LL_PROFILE_ZONE_SCOPED
+        LL_PROFILE_ZONE_SCOPED;
 
         for (const Data *di(boost::begin(typedata)), *dend(boost::end(typedata)); di != dend; ++di)
         {
@@ -543,7 +543,7 @@ public:
 
     std::string lookup(LLSD::Type type) const
     {
-        LL_PROFILE_ZONE_SCOPED
+        LL_PROFILE_ZONE_SCOPED;
 
         MapType::const_iterator found = mMap.find(type);
         if (found != mMap.end())
@@ -595,7 +595,7 @@ static std::string match_types(LLSD::Type expect, // prototype.type()
                                LLSD::Type actual,        // type we're checking
                                const std::string& pfx)   // as for llsd_matches
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 
     // Trivial case: if the actual type is exactly what we expect, we're good.
     if (actual == expect)
@@ -634,7 +634,7 @@ static std::string match_types(LLSD::Type expect, // prototype.type()
 // see docstring in .h file
 std::string llsd_matches(const LLSD& prototype, const LLSD& data, const std::string& pfx)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 
     // An undefined prototype means that any data is valid.
     // An undefined slot in an array or map prototype means that any data
@@ -768,7 +768,7 @@ std::string llsd_matches(const LLSD& prototype, const LLSD& data, const std::str
 
 bool llsd_equals(const LLSD& lhs, const LLSD& rhs, int bits)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 
     // We're comparing strict equality of LLSD representation rather than
     // performing any conversions. So if the types aren't equal, the LLSD
@@ -878,7 +878,7 @@ namespace llsd
 
 LLSD& drill_ref(LLSD& blob, const LLSD& rawPath)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 
     // Treat rawPath uniformly as an array. If it's not already an array,
     // store it as the only entry in one. (But let's say Undefined means an
@@ -905,7 +905,7 @@ LLSD& drill_ref(LLSD& blob, const LLSD& rawPath)
     // path entry that's bad.
     for (LLSD::Integer i = 0; i < path.size(); ++i)
     {
-        LL_PROFILE_ZONE_NUM( i )
+        LL_PROFILE_ZONE_NUM(i);
 
         const LLSD& key{path[i]};
         if (key.isString())
@@ -935,7 +935,7 @@ LLSD& drill_ref(LLSD& blob, const LLSD& rawPath)
 
 LLSD drill(const LLSD& blob, const LLSD& path)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 
     // drill_ref() does exactly what we want. Temporarily cast away
     // const-ness and use that.
@@ -949,7 +949,7 @@ LLSD drill(const LLSD& blob, const LLSD& path)
 // filter may be include to exclude/include keys in a map.
 LLSD llsd_clone(LLSD value, LLSD filter)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 
     LLSD clone;
     bool has_filter(filter.isMap());
@@ -990,8 +990,7 @@ LLSD llsd_clone(LLSD value, LLSD filter)
 
     case LLSD::TypeBinary:
     {
-        LLSD::Binary bin(value.asBinary().begin(), value.asBinary().end());
-        clone = LLSD::Binary(bin);
+        clone = LLSD::Binary(value.asBinary().begin(), value.asBinary().end());
         break;
     }
     default:
diff --git a/indra/llcommon/llsingleton.cpp b/indra/llcommon/llsingleton.cpp
index d00e703a10..05dc3cde79 100644
--- a/indra/llcommon/llsingleton.cpp
+++ b/indra/llcommon/llsingleton.cpp
@@ -59,9 +59,8 @@ private:
     // it's safe to log -- which involves querying a different LLSingleton --
     // which requires accessing the master list.
     typedef std::recursive_mutex mutex_t;
-    typedef std::unique_lock<mutex_t> lock_t;
-
-    mutex_t mMutex;
+    LL_PROFILE_MUTEX_NAMED(mutex_t, mMutex, "Singleton MasterList");
+    typedef std::unique_lock<decltype(mMutex)> lock_t;
 
 public:
     // Instantiate this to both obtain a reference to MasterList::instance()
diff --git a/indra/llcommon/llsingleton.h b/indra/llcommon/llsingleton.h
index 7c6be25309..b5659e053c 100644
--- a/indra/llcommon/llsingleton.h
+++ b/indra/llcommon/llsingleton.h
@@ -35,9 +35,12 @@
 #include "lockstatic.h"
 #include "llthread.h"               // on_main_thread()
 #include "llmainthreadtask.h"
+#include "llprofiler.h"
+#include "llerror.h"
 
 #ifdef LL_WINDOWS
-#pragma warning( disable : 4506 )   // no definition for inline function
+#pragma warning(push)
+#pragma warning(disable : 4506)   // no definition for inline function
 #endif
 
 class LLSingletonBase: private boost::noncopyable
@@ -297,7 +300,7 @@ private:
         // Use a recursive_mutex in case of constructor circularity. With a
         // non-recursive mutex, that would result in deadlock.
         typedef std::recursive_mutex mutex_t;
-        mutex_t mMutex;             // LockStatic looks for mMutex
+        LL_PROFILE_MUTEX_NAMED(mutex_t, mMutex, "Singleton Data"); // LockStatic looks for mMutex
 
         EInitState      mInitState{UNINITIALIZED};
         DERIVED_TYPE*   mInstance{nullptr};
@@ -419,7 +422,7 @@ protected:
         // deleteSingleton() to defend against manual deletion. When we moved
         // cleanup to deleteSingleton(), we hit crashes due to dangling
         // pointers in the MasterList.
-        LockStatic lk;
+        LockStatic lk; LL_PROFILE_MUTEX_LOCK(lk->mMutex);
         lk->mInstance  = nullptr;
         lk->mInitState = DELETED;
 
@@ -447,7 +450,7 @@ public:
         // Hold the lock while we call cleanupSingleton() and the destructor.
         // Our destructor also instantiates LockStatic, requiring a recursive
         // mutex.
-        LockStatic lk;
+        LockStatic lk; LL_PROFILE_MUTEX_LOCK(lk->mMutex);
         // of course, only cleanup and delete if there's something there
         if (lk->mInstance)
         {
@@ -504,7 +507,7 @@ public:
         { // nested scope for 'lk'
             // In case racing threads call getInstance() at the same moment,
             // serialize the calls.
-            LockStatic lk;
+            LockStatic lk; LL_PROFILE_MUTEX_LOCK(lk->mMutex);
 
             switch (lk->mInitState)
             {
@@ -594,7 +597,7 @@ public:
     static bool instanceExists()
     {
         // defend any access to sData from racing threads
-        LockStatic lk;
+        LockStatic lk; LL_PROFILE_MUTEX_LOCK(lk->mMutex);
         return lk->mInitState == INITIALIZED;
     }
 
@@ -604,7 +607,7 @@ public:
     static bool wasDeleted()
     {
         // defend any access to sData from racing threads
-        LockStatic lk;
+        LockStatic lk; LL_PROFILE_MUTEX_LOCK(lk->mMutex);
         return lk->mInitState == DELETED;
     }
 };
@@ -643,7 +646,7 @@ private:
         // In case racing threads both call initParamSingleton() at the same
         // time, serialize them. One should initialize; the other should see
         // mInitState already set.
-        LockStatic lk;
+        LockStatic lk; LL_PROFILE_MUTEX_LOCK(lk->mMutex);
         // For organizational purposes this function shouldn't be called twice
         if (lk->mInitState != super::UNINITIALIZED)
         {
@@ -707,7 +710,7 @@ public:
     {
         // In case racing threads call getInstance() at the same moment as
         // initParamSingleton(), serialize the calls.
-        LockStatic lk;
+        LockStatic lk; LL_PROFILE_MUTEX_LOCK(lk->mMutex);
 
         switch (lk->mInitState)
         {
@@ -861,4 +864,8 @@ private:
 template <class T>
 T* LLSimpleton<T>::sInstance{ nullptr };
 
+#ifdef LL_WINDOWS
+#pragma warning(pop)
+#endif
+
 #endif
diff --git a/indra/llcommon/llstacktrace.cpp b/indra/llcommon/llstacktrace.cpp
index bda3579f60..ca8f4299d9 100644
--- a/indra/llcommon/llstacktrace.cpp
+++ b/indra/llcommon/llstacktrace.cpp
@@ -33,10 +33,7 @@
 #include <sstream>
 
 #include "llwin32headerslean.h"
-#pragma warning (push)
-#pragma warning (disable:4091) // a microsoft header has warnings. Very nice.
 #include <dbghelp.h>
-#pragma warning (pop)
 
 typedef USHORT NTAPI RtlCaptureStackBackTrace_Function(
     IN ULONG frames_to_skip,
diff --git a/indra/llcommon/llstl.h b/indra/llcommon/llstl.h
index 1b52d94258..7d41c42ba7 100644
--- a/indra/llcommon/llstl.h
+++ b/indra/llcommon/llstl.h
@@ -226,11 +226,11 @@ void delete_and_clear_array(T*& ptr)
 //  foo[2] = "hello";
 //  const char* bar = get_ptr_in_map(foo, 2); // bar -> "hello"
 //  const char* baz = get_ptr_in_map(foo, 3); // baz == NULL
-template <typename K, typename T>
-inline T* get_ptr_in_map(const std::map<K,T*>& inmap, const K& key)
+template <typename T>
+inline typename T::mapped_type get_ptr_in_map(const T& inmap, typename T::key_type const& key)
 {
     // Typedef here avoids warnings because of new c++ naming rules.
-    typedef typename std::map<K,T*>::const_iterator map_iter;
+    typedef typename T::const_iterator map_iter;
     map_iter iter = inmap.find(key);
     if(iter == inmap.end())
     {
diff --git a/indra/llcommon/llstring.cpp b/indra/llcommon/llstring.cpp
index 514d73b24b..505789f9ea 100644
--- a/indra/llcommon/llstring.cpp
+++ b/indra/llcommon/llstring.cpp
@@ -250,7 +250,7 @@ LLWString utf16str_to_wstring(const U16* utf16str, size_t len)
     while (i < len)
     {
         llwchar cur_char;
-        i += utf16chars_to_wchar(chars16+i, &cur_char);
+        i += (S32)utf16chars_to_wchar(chars16+i, &cur_char);
         wout += cur_char;
     }
     return wout;
@@ -900,6 +900,11 @@ void HeapFree_deleter(void* ptr)
 
 } // anonymous namespace
 
+unsigned long windows_get_last_error()
+{
+    return GetLastError();
+}
+
 template<>
 std::wstring windows_message<std::wstring>(DWORD error)
 {
@@ -1208,6 +1213,75 @@ namespace LLStringFn
         return output;
     }
 
+    using literals_t = std::map<char, std::string>;
+    static const literals_t xml_elem_literals =
+    {
+        { '<', "&lt;" },
+        { '>', "&gt;" },
+        { '&', "&amp;" }
+    };
+    static const literals_t xml_attr_literals =
+    {
+        { '"', "&quot;" },
+        { '\'', "&apos;" }
+    };
+
+    static void literals_encode(std::string& text, const literals_t& literals)
+    {
+        for (const std::pair<char, std::string> it : literals)
+        {
+            std::string::size_type pos = 0;
+            while ((pos = text.find(it.first, pos)) != std::string::npos)
+            {
+                text.replace(pos, 1, it.second);
+                pos += it.second.size();
+            }
+        }
+    }
+
+    static void literals_decode(std::string& text, const literals_t& literals)
+    {
+        for (const std::pair<char, std::string> it : literals)
+        {
+            std::string::size_type pos = 0;
+            while ((pos = text.find(it.second, pos)) != std::string::npos)
+            {
+                text[pos++] = it.first;
+                text.erase(pos, it.second.size() - 1);
+            }
+        }
+    }
+
+    /**
+     * @brief Replace all characters that are not allowed in XML 1.0
+     * with corresponding literals: [ < > & ] => [ &lt; &gt; &amp; ]
+     */
+    std::string xml_encode(const std::string& input, bool for_attribute)
+    {
+        std::string result(input);
+        literals_encode(result, xml_elem_literals);
+        if (for_attribute)
+        {
+            literals_encode(result, xml_attr_literals);
+        }
+        return result;
+    }
+
+    /**
+     * @brief Replace some of XML literals that are defined in XML 1.0
+     * with corresponding characters: [ &lt; &gt; &amp; ] => [ < > & ]
+     */
+    std::string xml_decode(const std::string& input, bool for_attribute)
+    {
+        std::string result(input);
+        literals_decode(result, xml_elem_literals);
+        if (for_attribute)
+        {
+            literals_decode(result, xml_attr_literals);
+        }
+        return result;
+    }
+
     /**
      * @brief Replace all control characters (c < 0x20) with replacement in
      * string.
diff --git a/indra/llcommon/llstring.h b/indra/llcommon/llstring.h
index 123f4184b5..7a8edc176d 100644
--- a/indra/llcommon/llstring.h
+++ b/indra/llcommon/llstring.h
@@ -46,7 +46,6 @@
 #endif
 
 #include <string.h>
-#include <boost/scoped_ptr.hpp>
 
 const char LL_UNKNOWN_CHAR = '?';
 class LLSD;
@@ -54,6 +53,7 @@ class LLSD;
 #if LL_DARWIN || LL_LINUX
 // Template specialization of char_traits for U16s. Only necessary on Mac and Linux (exists on Windows already)
 #include <cstring>
+#include <memory>
 
 namespace std
 {
@@ -832,8 +832,10 @@ template<>
 LL_COMMON_API std::wstring windows_message<std::wstring>(unsigned long error);
 
 /// Get Windows message string, implicitly calling GetLastError()
+LL_COMMON_API unsigned long windows_get_last_error();
+
 template<typename STRING>
-STRING windows_message() { return windows_message<STRING>(GetLastError()); }
+STRING windows_message() { return windows_message<STRING>(windows_get_last_error()); }
 
 //@}
 
@@ -890,6 +892,20 @@ namespace LLStringFn
 
 
     /**
+     * @brief Replace all characters that are not allowed in XML 1.0
+     * with corresponding literals: [ < > & ] => [ &lt; &gt; &amp; ]
+     */
+    LL_COMMON_API std::string xml_encode(const std::string& input, bool for_attribute = false);
+
+
+    /**
+     * @brief Replace some of XML literals that are defined in XML 1.0
+     * with corresponding characters: [ &lt; &gt; &amp; ] => [ < > & ]
+     */
+    LL_COMMON_API std::string xml_decode(const std::string& input, bool for_attribute = false);
+
+
+    /**
      * @brief Replace all control characters (0 <= c < 0x20) with replacement in
      * string.   This is safe for utf-8
      *
diff --git a/indra/llcommon/llsys.cpp b/indra/llcommon/llsys.cpp
index 546f35bc81..4e85618b2d 100644
--- a/indra/llcommon/llsys.cpp
+++ b/indra/llcommon/llsys.cpp
@@ -74,6 +74,8 @@ using namespace llsd;
 #   include <mach/mach_host.h>
 #   include <mach/task.h>
 #   include <mach/task_info.h>
+#   include <sys/types.h>
+#   include <mach/mach_init.h>
 #elif LL_LINUX
 #   include <errno.h>
 #   include <sys/utsname.h>
@@ -90,6 +92,7 @@ const char MEMINFO_FILE[] = "/proc/meminfo";
 #endif
 
 LLCPUInfo gSysCPU;
+LLMemoryInfo gSysMemory;
 
 // Don't log memory info any more often than this. It also serves as our
 // framerate sample size.
@@ -806,33 +809,32 @@ U32Kilobytes LLMemoryInfo::getPhysicalMemoryKB() const
 }
 
 //static
-void LLMemoryInfo::getAvailableMemoryKB(U32Kilobytes& avail_physical_mem_kb, U32Kilobytes& avail_virtual_mem_kb)
+void LLMemoryInfo::getAvailableMemoryKB(U32Kilobytes& avail_mem_kb)
 {
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_MEMORY;
 #if LL_WINDOWS
     // Sigh, this shouldn't be a static method, then we wouldn't have to
     // reload this data separately from refresh()
     LLSD statsMap(loadStatsMap());
 
-    avail_physical_mem_kb = (U32Kilobytes)statsMap["Avail Physical KB"].asInteger();
-    avail_virtual_mem_kb  = (U32Kilobytes)statsMap["Avail Virtual KB"].asInteger();
+    avail_mem_kb = (U32Kilobytes)statsMap["Avail Physical KB"].asInteger();
 
 #elif LL_DARWIN
-    // mStatsMap is derived from vm_stat, look for (e.g.) "kb free":
-    // $ vm_stat
-    // Mach Virtual Memory Statistics: (page size of 4096 bytes)
-    // Pages free:                   462078.
-    // Pages active:                 142010.
-    // Pages inactive:               220007.
-    // Pages wired down:             159552.
-    // "Translation faults":      220825184.
-    // Pages copy-on-write:         2104153.
-    // Pages zero filled:         167034876.
-    // Pages reactivated:             65153.
-    // Pageins:                     2097212.
-    // Pageouts:                      41759.
-    // Object cache: 841598 hits of 7629869 lookups (11% hit rate)
-    avail_physical_mem_kb = (U32Kilobytes)-1 ;
-    avail_virtual_mem_kb = (U32Kilobytes)-1 ;
+    // use host_statistics64 to get memory info
+    vm_statistics64_data_t vmstat;
+    mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
+    mach_port_t host = mach_host_self();
+    vm_size_t page_size;
+    host_page_size(host, &page_size);
+    kern_return_t result = host_statistics64(host, HOST_VM_INFO64, reinterpret_cast<host_info_t>(&vmstat), &count);
+    if (result == KERN_SUCCESS)
+    {
+        avail_mem_kb = U64Bytes((vmstat.free_count + vmstat.inactive_count) * page_size);
+    }
+    else
+    {
+        avail_mem_kb = (U32Kilobytes)-1;
+    }
 
 #elif LL_LINUX
     // mStatsMap is derived from MEMINFO_FILE:
@@ -883,15 +885,14 @@ void LLMemoryInfo::getAvailableMemoryKB(U32Kilobytes& avail_physical_mem_kb, U32
     // DirectMap4k:      434168 kB
     // DirectMap2M:      477184 kB
     // (could also run 'free', but easier to read a file than run a program)
-    avail_physical_mem_kb = (U32Kilobytes)-1 ;
-    avail_virtual_mem_kb = (U32Kilobytes)-1 ;
+    LLSD statsMap(loadStatsMap());
 
+    avail_mem_kb = (U32Kilobytes)statsMap["MemFree"].asInteger();
 #else
     //do not know how to collect available memory info for other systems.
     //leave it blank here for now.
 
-    avail_physical_mem_kb = (U32Kilobytes)-1 ;
-    avail_virtual_mem_kb = (U32Kilobytes)-1 ;
+    avail_mem_kb = (U32Kilobytes)-1 ;
 #endif
 }
 
@@ -937,7 +938,7 @@ LLSD LLMemoryInfo::getStatsMap() const
 
 LLMemoryInfo& LLMemoryInfo::refresh()
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
     mStatsMap = loadStatsMap();
 
     LL_DEBUGS("LLMemoryInfo") << "Populated mStatsMap:\n";
@@ -986,7 +987,7 @@ LLSD LLMemoryInfo::loadStatsMap()
     // specifically accepts PROCESS_MEMORY_COUNTERS*, and since this is a
     // classic-C API, PROCESS_MEMORY_COUNTERS_EX isn't a subclass. Cast the
     // pointer.
-    GetProcessMemoryInfo(GetCurrentProcess(), PPROCESS_MEMORY_COUNTERS(&pmem), sizeof(pmem));
+    GetProcessMemoryInfo(GetCurrentProcess(), (PROCESS_MEMORY_COUNTERS*) &pmem, sizeof(pmem));
 
     stats.add("Page Fault Count",              pmem.PageFaultCount);
     stats.add("PeakWorkingSetSize KB",         pmem.PeakWorkingSetSize/div);
diff --git a/indra/llcommon/llsys.h b/indra/llcommon/llsys.h
index 3307285934..c8ff4dd98a 100644
--- a/indra/llcommon/llsys.h
+++ b/indra/llcommon/llsys.h
@@ -134,8 +134,8 @@ public:
     static U32Kilobytes getHardwareMemSize(); // Because some Mac linkers won't let us reference extern gSysMemory from a different lib.
 #endif
 
-    //get the available memory infomation in KiloBytes.
-    static void getAvailableMemoryKB(U32Kilobytes& avail_physical_mem_kb, U32Kilobytes& avail_virtual_mem_kb);
+    //get the available memory in KiloBytes.
+    static void getAvailableMemoryKB(U32Kilobytes& avail_mem_kb);
 
     // Retrieve a map of memory statistics. The keys of the map are platform-
     // dependent. The values are in kilobytes to try to avoid integer overflow.
@@ -169,6 +169,7 @@ bool LL_COMMON_API gunzip_file(const std::string& srcfile, const std::string& ds
 // gzip srcfile into dstfile.  Returns false on error.
 bool LL_COMMON_API gzip_file(const std::string& srcfile, const std::string& dstfile);
 
+extern LL_COMMON_API LLMemoryInfo gSysMemory;
 extern LL_COMMON_API LLCPUInfo gSysCPU;
 
 #endif // LL_LLSYS_H
diff --git a/indra/llcommon/llthread.cpp b/indra/llcommon/llthread.cpp
index faaaefd561..e5d25b52f0 100644
--- a/indra/llcommon/llthread.cpp
+++ b/indra/llcommon/llthread.cpp
@@ -269,6 +269,7 @@ void LLThread::shutdown()
             mStatus = STOPPED;
             return;
         }
+        delete mThreadp;
         mThreadp = NULL;
     }
 
@@ -299,6 +300,7 @@ void LLThread::start()
     {
         mThreadp = new std::thread(std::bind(&LLThread::threadRun, this));
         mNativeHandle = mThreadp->native_handle();
+        mThreadp->detach();
     }
     catch (std::system_error& ex)
     {
@@ -344,7 +346,7 @@ bool LLThread::runCondition(void)
 // Stop thread execution if requested until unpaused.
 void LLThread::checkPause()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     mDataLock->lock();
 
     // This is in a while loop because the pthread API allows for spurious wakeups.
@@ -376,20 +378,20 @@ void LLThread::setQuitting()
 // static
 LLThread::id_t LLThread::currentID()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     return std::this_thread::get_id();
 }
 
 // static
 void LLThread::yield()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     std::this_thread::yield();
 }
 
 void LLThread::wake()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     mDataLock->lock();
     if(!shouldSleep())
     {
@@ -400,7 +402,7 @@ void LLThread::wake()
 
 void LLThread::wakeLocked()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     if(!shouldSleep())
     {
         mRunCondition->signal();
@@ -409,13 +411,13 @@ void LLThread::wakeLocked()
 
 void LLThread::lockData()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     mDataLock->lock();
 }
 
 void LLThread::unlockData()
 {
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_THREAD;
     mDataLock->unlock();
 }
 
diff --git a/indra/llcommon/lltimer.cpp b/indra/llcommon/lltimer.cpp
index 5d0a70a382..d85b1bbfee 100644
--- a/indra/llcommon/lltimer.cpp
+++ b/indra/llcommon/lltimer.cpp
@@ -91,7 +91,7 @@ U32 micro_sleep(U64 us, U32 max_yields)
 
 U32 micro_sleep(U64 us, U32 max_yields)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
 #if 0
     LARGE_INTEGER ft;
     ft.QuadPart = -static_cast<S64>(us * 10);  // '-' using relative time
@@ -101,7 +101,7 @@ U32 micro_sleep(U64 us, U32 max_yields)
     WaitForSingleObject(timer, INFINITE);
     CloseHandle(timer);
 #else
-    Sleep(us / 1000);
+    Sleep((DWORD)(us / 1000));
 #endif
 
     return 0;
@@ -109,7 +109,7 @@ U32 micro_sleep(U64 us, U32 max_yields)
 
 void ms_sleep(U32 ms)
 {
-    LL_PROFILE_ZONE_SCOPED
+    LL_PROFILE_ZONE_SCOPED;
     micro_sleep(ms * 1000, 0);
 }
 
diff --git a/indra/llcommon/lltraceaccumulators.cpp b/indra/llcommon/lltraceaccumulators.cpp
index 8741087f3a..dc9a87eb80 100644
--- a/indra/llcommon/lltraceaccumulators.cpp
+++ b/indra/llcommon/lltraceaccumulators.cpp
@@ -100,7 +100,7 @@ bool AccumulatorBufferGroup::isCurrent() const
     return mCounts.isCurrent();
 }
 
-void AccumulatorBufferGroup::append( const AccumulatorBufferGroup& other )
+void AccumulatorBufferGroup::append(const AccumulatorBufferGroup& other)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_STATS;
     mCounts.addSamples(other.mCounts, SEQUENTIAL);
@@ -109,7 +109,7 @@ void AccumulatorBufferGroup::append( const AccumulatorBufferGroup& other )
     mStackTimers.addSamples(other.mStackTimers, SEQUENTIAL);
 }
 
-void AccumulatorBufferGroup::merge( const AccumulatorBufferGroup& other)
+void AccumulatorBufferGroup::merge(const AccumulatorBufferGroup& other)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_STATS;
     mCounts.addSamples(other.mCounts, NON_SEQUENTIAL);
@@ -140,7 +140,7 @@ void AccumulatorBufferGroup::sync()
 
 F64 SampleAccumulator::mergeSumsOfSquares(const SampleAccumulator& a, const SampleAccumulator& b)
 {
-    const F64 epsilon = 0.0000001;
+    constexpr F64 epsilon = 0.0000001;
 
     if (a.getSamplingTime() > epsilon && b.getSamplingTime() > epsilon)
     {
@@ -170,7 +170,7 @@ F64 SampleAccumulator::mergeSumsOfSquares(const SampleAccumulator& a, const Samp
     return a.getSumOfSquares();
 }
 
-void SampleAccumulator::addSamples( const SampleAccumulator& other, EBufferAppendType append_type )
+void SampleAccumulator::addSamples(const SampleAccumulator& other, EBufferAppendType append_type)
 {
     if (append_type == NON_SEQUENTIAL)
     {
@@ -205,7 +205,7 @@ void SampleAccumulator::addSamples( const SampleAccumulator& other, EBufferAppen
     }
 }
 
-void SampleAccumulator::reset( const SampleAccumulator* other )
+void SampleAccumulator::reset(const SampleAccumulator* other)
 {
     mLastValue = other ? other->mLastValue : NaN;
     mHasValue = other ? other->mHasValue : false;
@@ -243,7 +243,7 @@ F64 EventAccumulator::mergeSumsOfSquares(const EventAccumulator& a, const EventA
     return a.mSumOfSquares;
 }
 
-void EventAccumulator::addSamples( const EventAccumulator& other, EBufferAppendType append_type )
+void EventAccumulator::addSamples(const EventAccumulator& other, EBufferAppendType append_type)
 {
     if (other.mNumSamples)
     {
@@ -269,12 +269,12 @@ void EventAccumulator::addSamples( const EventAccumulator& other, EBufferAppendT
     }
 }
 
-void EventAccumulator::reset( const EventAccumulator* other )
+void EventAccumulator::reset(const EventAccumulator* other)
 {
     mNumSamples = 0;
     mSum = 0;
-    mMin = F32(NaN);
-    mMax = F32(NaN);
+    mMin = NaN;
+    mMax = NaN;
     mMean = NaN;
     mSumOfSquares = 0;
     mLastValue = other ? other->mLastValue : NaN;
diff --git a/indra/llcommon/lltraceaccumulators.h b/indra/llcommon/lltraceaccumulators.h
index ba7acf9547..0a2e2bf997 100644
--- a/indra/llcommon/lltraceaccumulators.h
+++ b/indra/llcommon/lltraceaccumulators.h
@@ -39,7 +39,7 @@
 
 namespace LLTrace
 {
-    const F64 NaN   = std::numeric_limits<double>::quiet_NaN();
+    constexpr F64 NaN = std::numeric_limits<double>::quiet_NaN();
 
     enum EBufferAppendType
     {
@@ -251,8 +251,8 @@ namespace LLTrace
 
         EventAccumulator()
         :   mSum(0),
-            mMin(F32(NaN)),
-            mMax(F32(NaN)),
+            mMin(NaN),
+            mMax(NaN),
             mMean(NaN),
             mSumOfSquares(0),
             mNumSamples(0),
@@ -288,11 +288,11 @@ namespace LLTrace
         void sync(F64SecondsImplicit) {}
 
         F64 getSum() const               { return mSum; }
-        F32 getMin() const               { return mMin; }
-        F32 getMax() const               { return mMax; }
+        F64 getMin() const               { return mMin; }
+        F64 getMax() const               { return mMax; }
         F64 getLastValue() const         { return mLastValue; }
         F64 getMean() const              { return mMean; }
-        F64 getStandardDeviation() const { return sqrtf(mSumOfSquares / mNumSamples); }
+        F64 getStandardDeviation() const { return sqrt(mSumOfSquares / mNumSamples); }
         F64 getSumOfSquares() const      { return mSumOfSquares; }
         S32 getSampleCount() const       { return mNumSamples; }
         bool hasValue() const            { return mNumSamples > 0; }
@@ -307,7 +307,7 @@ namespace LLTrace
         F64 mMean,
             mSumOfSquares;
 
-        F32 mMin,
+        F64 mMin,
             mMax;
 
         S32 mNumSamples;
@@ -322,8 +322,8 @@ namespace LLTrace
 
         SampleAccumulator()
         :   mSum(0),
-            mMin(F32(NaN)),
-            mMax(F32(NaN)),
+            mMin(NaN),
+            mMax(NaN),
             mMean(NaN),
             mSumOfSquares(0),
             mLastSampleTimeStamp(0),
@@ -378,11 +378,11 @@ namespace LLTrace
         }
 
         F64 getSum() const               { return mSum; }
-        F32 getMin() const               { return mMin; }
-        F32 getMax() const               { return mMax; }
+        F64 getMin() const               { return mMin; }
+        F64 getMax() const               { return mMax; }
         F64 getLastValue() const         { return mLastValue; }
         F64 getMean() const              { return mMean; }
-        F64 getStandardDeviation() const { return sqrtf(mSumOfSquares / mTotalSamplingTime); }
+        F64 getStandardDeviation() const { return sqrt(mSumOfSquares / mTotalSamplingTime); }
         F64 getSumOfSquares() const      { return mSumOfSquares; }
         F64SecondsImplicit getSamplingTime() const { return mTotalSamplingTime; }
         S32 getSampleCount() const       { return mNumSamples; }
@@ -402,7 +402,7 @@ namespace LLTrace
                 mLastSampleTimeStamp,
                 mTotalSamplingTime;
 
-        F32     mMin,
+        F64     mMin,
                 mMax;
 
         S32     mNumSamples;
diff --git a/indra/llcommon/lltracerecording.cpp b/indra/llcommon/lltracerecording.cpp
index 1ec83be7cb..c23adca7e8 100644
--- a/indra/llcommon/lltracerecording.cpp
+++ b/indra/llcommon/lltracerecording.cpp
@@ -229,7 +229,7 @@ F32 Recording::getPerSec(const StatType<TimeBlockAccumulator::CallCountFacet>& s
     update();
     const TimeBlockAccumulator& accumulator = mBuffers->mStackTimers[stat.getIndex()];
     const TimeBlockAccumulator* active_accumulator = mActiveBuffers ? &mActiveBuffers->mStackTimers[stat.getIndex()] : NULL;
-    return (F32)(accumulator.mCalls + (active_accumulator ? active_accumulator->mCalls : 0)) / mElapsedSeconds.value();
+    return (F32)(accumulator.mCalls + (active_accumulator ? active_accumulator->mCalls : 0)) / (F32)mElapsedSeconds.value();
 }
 
 bool Recording::hasValue(const StatType<CountAccumulator>& stat)
@@ -296,11 +296,11 @@ F64 Recording::getMean( const StatType<SampleAccumulator>& stat )
     const SampleAccumulator* active_accumulator = mActiveBuffers ? &mActiveBuffers->mSamples[stat.getIndex()] : NULL;
     if (active_accumulator && active_accumulator->hasValue())
     {
-        F32 t = 0.0f;
+        F64 t = 0.0;
         S32 div = accumulator.getSampleCount() + active_accumulator->getSampleCount();
         if (div > 0)
         {
-            t = active_accumulator->getSampleCount() / div;
+            t = (F64)active_accumulator->getSampleCount() / (F64)div;
         }
         return lerp(accumulator.getMean(), active_accumulator->getMean(), t);
     }
@@ -319,7 +319,7 @@ F64 Recording::getStandardDeviation( const StatType<SampleAccumulator>& stat )
     if (active_accumulator && active_accumulator->hasValue())
     {
         F64 sum_of_squares = SampleAccumulator::mergeSumsOfSquares(accumulator, *active_accumulator);
-        return sqrtf(sum_of_squares / (accumulator.getSamplingTime() + active_accumulator->getSamplingTime()));
+        return sqrt(sum_of_squares / (F64)(accumulator.getSamplingTime() + active_accumulator->getSamplingTime()));
     }
     else
     {
@@ -382,11 +382,11 @@ F64 Recording::getMean( const StatType<EventAccumulator>& stat )
     const EventAccumulator* active_accumulator = mActiveBuffers ? &mActiveBuffers->mEvents[stat.getIndex()] : NULL;
     if (active_accumulator && active_accumulator->hasValue())
     {
-        F32 t = 0.0f;
+        F64 t = 0.0;
         S32 div = accumulator.getSampleCount() + active_accumulator->getSampleCount();
         if (div > 0)
         {
-            t = active_accumulator->getSampleCount() / div;
+            t = (F64)active_accumulator->getSampleCount() / (F64)div;
         }
         return lerp(accumulator.getMean(), active_accumulator->getMean(), t);
     }
@@ -405,7 +405,7 @@ F64 Recording::getStandardDeviation( const StatType<EventAccumulator>& stat )
     if (active_accumulator && active_accumulator->hasValue())
     {
         F64 sum_of_squares = EventAccumulator::mergeSumsOfSquares(accumulator, *active_accumulator);
-        return sqrtf(sum_of_squares / (accumulator.getSampleCount() + active_accumulator->getSampleCount()));
+        return sqrt(sum_of_squares / (F64)(accumulator.getSampleCount() + active_accumulator->getSampleCount()));
     }
     else
     {
diff --git a/indra/llcommon/lltracerecording.h b/indra/llcommon/lltracerecording.h
index 985f06cd59..ad4c91d85b 100644
--- a/indra/llcommon/lltracerecording.h
+++ b/indra/llcommon/lltracerecording.h
@@ -35,6 +35,11 @@
 #include "llpointer.h"
 #include <limits>
 
+#ifdef LL_WINDOWS
+#pragma warning(push)
+#pragma warning(disable : 4244) // possible loss of data on conversions
+#endif
+
 class LLStopWatchControlsMixinCommon
 {
 public:
@@ -714,4 +719,8 @@ namespace LLTrace
     };
 }
 
+#ifdef LL_WINDOWS
+#pragma warning(pop)
+#endif
+
 #endif // LL_LLTRACERECORDING_H
diff --git a/indra/llcommon/llunittype.h b/indra/llcommon/llunittype.h
index 83ce0d05a8..bb1408609a 100644
--- a/indra/llcommon/llunittype.h
+++ b/indra/llcommon/llunittype.h
@@ -31,6 +31,11 @@
 #include "llpreprocessor.h"
 #include "llerror.h"
 
+#ifdef LL_WINDOWS
+#pragma warning(push)
+#pragma warning(disable : 4244) // possible loss of data on conversions
+#endif
+
 //lightweight replacement of type traits for simple type equality check
 template<typename S, typename T>
 struct LLIsSameType
@@ -846,4 +851,8 @@ LL_FORCE_INLINE S2 ll_convert_units(LLUnit<S1, base_unit_name> in, LLUnit<S2, un
     typedef LLUnit<U64, ns::unit_name> U64##unit_name;                  \
     typedef LLUnitImplicit<U64, ns::unit_name> U64##unit_name##Implicit
 
+#ifdef LL_WINDOWS
+#pragma warning(pop)
+#endif
+
 #endif //LL_UNITTYPE_H
diff --git a/indra/llcommon/lluriparser.cpp b/indra/llcommon/lluriparser.cpp
index 2ebb7fc742..33a48d970d 100644
--- a/indra/llcommon/lluriparser.cpp
+++ b/indra/llcommon/lluriparser.cpp
@@ -29,12 +29,7 @@
 #include "linden_common.h"
 #include "lluriparser.h"
 
-#if LL_DARWIN
-#include <signal.h>
-#include <setjmp.h>
-#endif
-
-LLUriParser::LLUriParser(const std::string& u) : mTmpScheme(false), mNormalizedTmp(false), mRes(0)
+LLUriParser::LLUriParser(const std::string& u) : mTmpScheme(false), mNormalizedTmp(false), mRes(false)
 {
     if (u.find("://") == std::string::npos)
     {
@@ -42,36 +37,52 @@ LLUriParser::LLUriParser(const std::string& u) : mTmpScheme(false), mNormalizedT
         mTmpScheme = true;
     }
 
-    mNormalizedUri += u.c_str();
+    mNormalizedUri.append(u);
 
     mRes = parse();
 }
 
 LLUriParser::~LLUriParser()
 {
-    uriFreeUriMembersA(&mUri);
 }
 
-S32 LLUriParser::parse()
+bool LLUriParser::parse()
 {
-    mRes = uriParseSingleUriA(&mUri, mNormalizedUri.c_str(), NULL);
+    try
+    {
+        auto res = boost::urls::parse_uri(mNormalizedUri);
+        if (res)
+        {
+            mUri = *res;
+            mRes = true;
+        }
+        else
+        {
+            mRes = false;
+        }
+    }
+    catch (const std::length_error&)
+    {
+        LL_WARNS() << "Failed to parse uri due to exceeding uri_view max_size" << LL_ENDL;
+        mRes = false;
+    }
     return mRes;
 }
 
-const char * LLUriParser::scheme() const
+const std::string& LLUriParser::scheme() const
 {
-    return mScheme.c_str();
+    return mScheme;
 }
 
-void LLUriParser::sheme(const std::string& s)
+void LLUriParser::scheme(const std::string& s)
 {
     mTmpScheme = !s.size();
     mScheme = s;
 }
 
-const char * LLUriParser::port() const
+const std::string& LLUriParser::port() const
 {
-    return mPort.c_str();
+    return mPort;
 }
 
 void LLUriParser::port(const std::string& s)
@@ -79,9 +90,9 @@ void LLUriParser::port(const std::string& s)
     mPort = s;
 }
 
-const char * LLUriParser::host() const
+const std::string& LLUriParser::host() const
 {
-    return mHost.c_str();
+    return mHost;
 }
 
 void LLUriParser::host(const std::string& s)
@@ -89,9 +100,9 @@ void LLUriParser::host(const std::string& s)
     mHost = s;
 }
 
-const char * LLUriParser::path() const
+const std::string& LLUriParser::path() const
 {
-    return mPath.c_str();
+    return mPath;
 }
 
 void LLUriParser::path(const std::string& s)
@@ -99,9 +110,9 @@ void LLUriParser::path(const std::string& s)
     mPath = s;
 }
 
-const char * LLUriParser::query() const
+const std::string& LLUriParser::query() const
 {
-    return mQuery.c_str();
+    return mQuery;
 }
 
 void LLUriParser::query(const std::string& s)
@@ -109,9 +120,9 @@ void LLUriParser::query(const std::string& s)
     mQuery = s;
 }
 
-const char * LLUriParser::fragment() const
+const std::string& LLUriParser::fragment() const
 {
-    return mFragment.c_str();
+    return mFragment;
 }
 
 void LLUriParser::fragment(const std::string& s)
@@ -119,19 +130,6 @@ void LLUriParser::fragment(const std::string& s)
     mFragment = s;
 }
 
-void LLUriParser::textRangeToString(UriTextRangeA& textRange, std::string& str)
-{
-    if (textRange.first != NULL && textRange.afterLast != NULL && textRange.first < textRange.afterLast)
-    {
-        const ptrdiff_t len = textRange.afterLast - textRange.first;
-        str.assign(textRange.first, static_cast<std::string::size_type>(len));
-    }
-    else
-    {
-        str = LLStringUtil::null;
-    }
-}
-
 void LLUriParser::extractParts()
 {
     if (mTmpScheme || mNormalizedTmp)
@@ -140,96 +138,24 @@ void LLUriParser::extractParts()
     }
     else
     {
-        textRangeToString(mUri.scheme, mScheme);
+        mScheme = mUri.scheme();
     }
 
-    textRangeToString(mUri.hostText, mHost);
-    textRangeToString(mUri.portText, mPort);
-    textRangeToString(mUri.query, mQuery);
-    textRangeToString(mUri.fragment, mFragment);
-
-    UriPathSegmentA * pathHead = mUri.pathHead;
-    while (pathHead)
-    {
-        std::string partOfPath;
-        textRangeToString(pathHead->text, partOfPath);
-
-        mPath += '/';
-        mPath += partOfPath;
-
-        pathHead = pathHead->next;
-    }
+    mHost = mUri.host();
+    mPort = mUri.port();
+    mQuery = mUri.query();
+    mFragment = mUri.fragment();
+    mPath = mUri.path();
 }
 
-#if LL_DARWIN
-typedef void(*sighandler_t)(int);
-jmp_buf return_to_normalize;
-static int sLastSignal = 0;
-void uri_signal_handler(int signal)
-{
-    sLastSignal = signal;
-    // Apparently signal handler throwing an exception doesn't work.
-    // This is ugly and unsafe due to not unwinding content of uriparser library,
-    // but unless we have a way to catch this as NSexception, jump appears to be the only option.
-    longjmp(return_to_normalize, 1 /*setjmp will return this value*/);
-}
-#endif
-
-S32 LLUriParser::normalize()
+bool LLUriParser::normalize()
 {
     mNormalizedTmp = mTmpScheme;
-    if (!mRes)
+    if (mRes)
     {
-#if LL_DARWIN
-        sighandler_t last_sigill_handler, last_sigbus_handler;
-        last_sigill_handler = signal(SIGILL, &uri_signal_handler);      // illegal instruction
-        last_sigbus_handler = signal(SIGBUS, &uri_signal_handler);
-
-        if (setjmp(return_to_normalize))
-        {
-            // Issue: external library crashed via signal
-            // If you encountered this, please try to figure out what's wrong:
-            // 1. Verify that library's input is 'sane'
-            // 2. Check if we have an NSexception to work with (unlikely)
-            // 3. See if passing same string causes exception to repeat
-            //
-            // Crash happens at uriNormalizeSyntaxExA
-            // Warning!!! This does not properly unwind stack,
-            // if this can be handled by NSexception, it needs to be remade
-            llassert(0);
-
-            LL_WARNS() << "Uriparser crashed with " << sLastSignal << " , while processing: " << mNormalizedUri << LL_ENDL;
-            signal(SIGILL, last_sigill_handler);
-            signal(SIGBUS, last_sigbus_handler);
-            return 1;
-        }
-#endif
-
-        mRes = uriNormalizeSyntaxExA(&mUri, URI_NORMALIZE_SCHEME | URI_NORMALIZE_HOST);
-
-#if LL_DARWIN
-        signal(SIGILL, last_sigill_handler);
-        signal(SIGBUS, last_sigbus_handler);
-#endif
-
-        if (!mRes)
-        {
-            S32 chars_required;
-            mRes = uriToStringCharsRequiredA(&mUri, &chars_required);
-
-            if (!mRes)
-            {
-                chars_required++;
-                std::vector<char> label_buf(chars_required);
-                mRes = uriToStringA(&label_buf[0], &mUri, chars_required, NULL);
-
-                if (!mRes)
-                {
-                    mNormalizedUri = &label_buf[mTmpScheme ? 7 : 0];
-                    mTmpScheme = false;
-                }
-            }
-        }
+        mUri.normalize_scheme().normalize_authority();
+        mNormalizedUri = mUri.buffer().substr(mTmpScheme ? 7 : 0);
+        mTmpScheme = false;
     }
 
     if(mTmpScheme && mNormalizedUri.size() > 7)
@@ -302,7 +228,7 @@ bool LLUriParser::test() const
     return uri == mNormalizedUri;
 }
 
-const char * LLUriParser::normalizedUri() const
+const std::string& LLUriParser::normalizedUri() const
 {
-    return mNormalizedUri.c_str();
+    return mNormalizedUri;
 }
diff --git a/indra/llcommon/lluriparser.h b/indra/llcommon/lluriparser.h
index 77eb4031d5..61d613f399 100644
--- a/indra/llcommon/lluriparser.h
+++ b/indra/llcommon/lluriparser.h
@@ -30,7 +30,7 @@
 #define LL_LLURIPARSER_H
 
 #include <string>
-#include "uriparser/Uri.h"
+#include "boost/url.hpp"
 
 class LL_COMMON_API LLUriParser
 {
@@ -38,36 +38,35 @@ public:
     LLUriParser(const std::string& u);
     ~LLUriParser();
 
-    const char * scheme() const;
-    void sheme (const std::string& s);
+    const std::string& scheme() const;
+    void scheme (const std::string& s);
 
-    const char * port() const;
+    const std::string& port() const;
     void port (const std::string& s);
 
-    const char * host() const;
+    const std::string& host() const;
     void host (const std::string& s);
 
-    const char * path() const;
+    const std::string& path() const;
     void path (const std::string& s);
 
-    const char * query() const;
+    const std::string& query() const;
     void query (const std::string& s);
 
-    const char * fragment() const;
+    const std::string& fragment() const;
     void fragment (const std::string& s);
 
-    const char * normalizedUri() const;
+    const std::string& normalizedUri() const;
 
     void extractParts();
     void glue(std::string& uri) const;
     void glueFirst(std::string& uri, bool use_scheme = true) const;
     void glueSecond(std::string& uri) const;
     bool test() const;
-    S32 normalize();
+    bool normalize();
 
 private:
-    S32 parse();
-    void textRangeToString(UriTextRangeA& textRange, std::string& str);
+    bool parse();
     std::string mScheme;
     std::string mHost;
     std::string mPort;
@@ -76,9 +75,9 @@ private:
     std::string mFragment;
     std::string mNormalizedUri;
 
-    UriUriA mUri;
+    boost::url mUri;
 
-    S32 mRes;
+    bool mRes;
     bool mTmpScheme;
     bool mNormalizedTmp;
 };
diff --git a/indra/llcommon/lluuid.cpp b/indra/llcommon/lluuid.cpp
index 931a6e340d..eb7233a21a 100644
--- a/indra/llcommon/lluuid.cpp
+++ b/indra/llcommon/lluuid.cpp
@@ -31,6 +31,7 @@
 // ugh, this is ugly.  We need to straighten out our linking for this library
 #pragma comment(lib, "IPHLPAPI.lib")
 #include <iphlpapi.h>
+#include <nb30.h>
 #endif
 
 #include "llapp.h"
diff --git a/indra/llcommon/tests/commonmisc_test.cpp b/indra/llcommon/tests/commonmisc_test.cpp
index 0057a1f639..b1a284225e 100644
--- a/indra/llcommon/tests/commonmisc_test.cpp
+++ b/indra/llcommon/tests/commonmisc_test.cpp
@@ -46,12 +46,6 @@
 
 #include "../test/lltut.h"
 
-
-#if LL_WINDOWS
-// disable overflow warnings
-#pragma warning(disable: 4307)
-#endif
-
 namespace tut
 {
     struct sd_data
diff --git a/indra/llcommon/tests/lleventcoro_test.cpp b/indra/llcommon/tests/lleventcoro_test.cpp
index a3c54ffaa2..ab174a8bde 100644
--- a/indra/llcommon/tests/lleventcoro_test.cpp
+++ b/indra/llcommon/tests/lleventcoro_test.cpp
@@ -30,8 +30,6 @@
 #include <boost/bind.hpp>
 #include <boost/range.hpp>
 #include <boost/utility.hpp>
-#include <boost/shared_ptr.hpp>
-#include <boost/make_shared.hpp>
 
 #include "linden_common.h"
 
diff --git a/indra/llcommon/tests/lleventfilter_test.cpp b/indra/llcommon/tests/lleventfilter_test.cpp
index a01d7fe415..d7b80e2545 100644
--- a/indra/llcommon/tests/lleventfilter_test.cpp
+++ b/indra/llcommon/tests/lleventfilter_test.cpp
@@ -81,13 +81,13 @@ class TestEventThrottle: public LLEventThrottleBase
 public:
     TestEventThrottle(F32 interval):
         LLEventThrottleBase(interval),
-        mAlarmRemaining(-1),
-        mTimerRemaining(-1)
+        mAlarmRemaining(-1.f),
+        mTimerRemaining(-1.f)
     {}
     TestEventThrottle(LLEventPump& source, F32 interval):
         LLEventThrottleBase(source, interval),
-        mAlarmRemaining(-1),
-        mTimerRemaining(-1)
+        mAlarmRemaining(-1.f),
+        mTimerRemaining(-1.f)
     {}
 
     /*----- implementation of LLEventThrottleBase timing functionality -----*/
@@ -100,12 +100,12 @@ public:
     virtual bool alarmRunning() const /*override*/
     {
         // decrementing to exactly 0 should mean the alarm fires
-        return mAlarmRemaining > 0;
+        return mAlarmRemaining > 0.f;
     }
 
     virtual void alarmCancel() /*override*/
     {
-        mAlarmRemaining = -1;
+        mAlarmRemaining = -1.f;
     }
 
     virtual void timerSet(F32 interval) /*override*/
@@ -116,7 +116,7 @@ public:
     virtual F32  timerGetRemaining() const /*override*/
     {
         // LLTimer.getRemainingTimeF32() never returns negative; 0.0 means expired
-        return (mTimerRemaining > 0.0)? mTimerRemaining : 0.0;
+        return (mTimerRemaining > 0.0f)? mTimerRemaining : 0.0f;
     }
 
     /*------------------- methods for manipulating time --------------------*/
diff --git a/indra/llcommon/tests/llinstancetracker_test.cpp b/indra/llcommon/tests/llinstancetracker_test.cpp
index c6eb0fdf75..bf661dc051 100644
--- a/indra/llcommon/tests/llinstancetracker_test.cpp
+++ b/indra/llcommon/tests/llinstancetracker_test.cpp
@@ -37,8 +37,6 @@
 #include <algorithm>                // std::sort()
 #include <stdexcept>
 // std headers
-// external library headers
-#include <boost/scoped_ptr.hpp>
 // other Linden headers
 #include "../test/lltut.h"
 
diff --git a/indra/llcommon/tests/llsdserialize_test.cpp b/indra/llcommon/tests/llsdserialize_test.cpp
index fb2af1d2db..fae9f7023f 100644
--- a/indra/llcommon/tests/llsdserialize_test.cpp
+++ b/indra/llcommon/tests/llsdserialize_test.cpp
@@ -1809,7 +1809,7 @@ namespace tut
         std::string q("\"");
         std::string qPYTHON(q + PYTHON + q);
         std::string qscript(q + scriptfile.getName() + q);
-        int rc = _spawnl(_P_WAIT, PYTHON.c_str(), qPYTHON.c_str(), qscript.c_str(),
+        int rc = (int)_spawnl(_P_WAIT, PYTHON.c_str(), qPYTHON.c_str(), qscript.c_str(),
                          std::forward<ARGS>(args)..., NULL);
         if (rc == -1)
         {
diff --git a/indra/llcommon/tests/lltrace_test.cpp b/indra/llcommon/tests/lltrace_test.cpp
index 8851f87b91..923a67ac8e 100644
--- a/indra/llcommon/tests/lltrace_test.cpp
+++ b/indra/llcommon/tests/lltrace_test.cpp
@@ -32,6 +32,10 @@
 #include "lltracerecording.h"
 #include "../test/lltut.h"
 
+#ifdef LL_WINDOWS
+#pragma warning(disable : 4244) // possible loss of data on conversions
+#endif
+
 namespace LLUnits
 {
     // using powers of 2 to allow strict floating point equality
diff --git a/indra/llcommon/tests/llunits_test.cpp b/indra/llcommon/tests/llunits_test.cpp
index 49f2d3085a..98a58eb47e 100644
--- a/indra/llcommon/tests/llunits_test.cpp
+++ b/indra/llcommon/tests/llunits_test.cpp
@@ -262,7 +262,7 @@ namespace tut
         F32 float_val = quatloos_implicit;
         ensure("implicit units convert implicitly to regular values", float_val == 16);
 
-        S32 int_val = quatloos_implicit;
+        S32 int_val = (S32)quatloos_implicit;
         ensure("implicit units convert implicitly to regular values", int_val == 16);
 
         // conversion of implicits