287 lines
8.4 KiB
C++
287 lines
8.4 KiB
C++
/**
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* @file slplugin.cpp
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* @brief Loader shell for plugins, intended to be launched by the plugin host application, which directly loads a plugin dynamic library.
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*
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* @cond
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*
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* $LicenseInfo:firstyear=2008&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*
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* @endcond
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*/
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#include "linden_common.h"
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#include "llpluginprocesschild.h"
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#include "llpluginmessage.h"
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#include "llerrorcontrol.h"
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#include "llapr.h"
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#include "llstring.h"
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#include <iostream>
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#include <fstream>
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using namespace std;
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#if LL_DARWIN
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#include "slplugin-objc.h"
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#endif
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#if LL_DARWIN || LL_LINUX
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#include <signal.h>
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#endif
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/*
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On Mac OS, since we call WaitNextEvent, this process will show up in the dock unless we set the LSBackgroundOnly or LSUIElement flag in the Info.plist.
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Normally non-bundled binaries don't have an info.plist file, but it's possible to embed one in the binary by adding this to the linker flags:
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-sectcreate __TEXT __info_plist /path/to/slplugin_info.plist
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which means adding this to the gcc flags:
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-Wl,-sectcreate,__TEXT,__info_plist,/path/to/slplugin_info.plist
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Now that SLPlugin is a bundled app on the Mac, this is no longer necessary (it can just use a regular Info.plist file), but I'm leaving this comment in for posterity.
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*/
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#if LL_DARWIN || LL_LINUX
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// Signal handlers to make crashes not show an OS dialog...
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static void crash_handler(int sig)
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{
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// Just exit cleanly.
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// TODO: add our own crash reporting
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_exit(1);
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}
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#endif
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#if LL_WINDOWS
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#include <windows.h>
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////////////////////////////////////////////////////////////////////////////////
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// Our exception handler - will probably just exit and the host application
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// will miss the heartbeat and log the error in the usual fashion.
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LONG WINAPI myWin32ExceptionHandler( struct _EXCEPTION_POINTERS* exception_infop )
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{
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//std::cerr << "This plugin (" << __FILE__ << ") - ";
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//std::cerr << "intercepted an unhandled exception and will exit immediately." << std::endl;
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// TODO: replace exception handler before we exit?
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return EXCEPTION_EXECUTE_HANDLER;
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}
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// Taken from : http://blog.kalmbachnet.de/?postid=75
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// The MSVC 2005 CRT forces the call of the default-debugger (normally Dr.Watson)
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// even with the other exception handling code. This (terrifying) piece of code
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// patches things so that doesn't happen.
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LPTOP_LEVEL_EXCEPTION_FILTER WINAPI MyDummySetUnhandledExceptionFilter(
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LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter )
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{
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return NULL;
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}
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BOOL PreventSetUnhandledExceptionFilter()
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{
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// remove the scary stuff that also isn't supported on 64 bit Windows
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return TRUE;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Hook our exception handler and replace the system one
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void initExceptionHandler()
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{
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LPTOP_LEVEL_EXCEPTION_FILTER prev_filter;
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// save old exception handler in case we need to restore it at the end
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prev_filter = SetUnhandledExceptionFilter( myWin32ExceptionHandler );
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PreventSetUnhandledExceptionFilter();
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}
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bool checkExceptionHandler()
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{
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bool ok = true;
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LPTOP_LEVEL_EXCEPTION_FILTER prev_filter;
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prev_filter = SetUnhandledExceptionFilter(myWin32ExceptionHandler);
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PreventSetUnhandledExceptionFilter();
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if (prev_filter != myWin32ExceptionHandler)
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{
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LL_WARNS("AppInit") << "Our exception handler (" << (void *)myWin32ExceptionHandler << ") replaced with " << prev_filter << "!" << LL_ENDL;
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ok = false;
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}
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if (prev_filter == NULL)
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{
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ok = FALSE;
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if (NULL == myWin32ExceptionHandler)
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{
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LL_WARNS("AppInit") << "Exception handler uninitialized." << LL_ENDL;
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}
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else
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{
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LL_WARNS("AppInit") << "Our exception handler (" << (void *)myWin32ExceptionHandler << ") replaced with NULL!" << LL_ENDL;
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}
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}
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return ok;
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}
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#endif
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// If this application on Windows platform is a console application, a console is always
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// created which is bad. Making it a Windows "application" via CMake settings but not
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// adding any code to explicitly create windows does the right thing.
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#if LL_WINDOWS
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int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
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#else
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int main(int argc, char **argv)
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#endif
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{
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ll_init_apr();
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// Set up llerror logging
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{
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LLError::initForApplication(".",".");
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LLError::setDefaultLevel(LLError::LEVEL_INFO);
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// LLError::setTagLevel("Plugin", LLError::LEVEL_DEBUG);
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// LLError::logToFile("slplugin.log");
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}
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#if LL_WINDOWS
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if( strlen( lpCmdLine ) == 0 )
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{
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LL_ERRS("slplugin") << "usage: " << "SLPlugin" << " launcher_port" << LL_ENDL;
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};
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U32 port = 0;
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if(!LLStringUtil::convertToU32(lpCmdLine, port))
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{
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LL_ERRS("slplugin") << "port number must be numeric" << LL_ENDL;
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};
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// Insert our exception handler into the system so this plugin doesn't
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// display a crash message if something bad happens. The host app will
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// see the missing heartbeat and log appropriately.
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initExceptionHandler();
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#elif LL_DARWIN || LL_LINUX
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if(argc < 2)
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{
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LL_ERRS("slplugin") << "usage: " << argv[0] << " launcher_port" << LL_ENDL;
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}
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U32 port = 0;
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if(!LLStringUtil::convertToU32(argv[1], port))
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{
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LL_ERRS("slplugin") << "port number must be numeric" << LL_ENDL;
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}
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// Catch signals that most kinds of crashes will generate, and exit cleanly so the system crash dialog isn't shown.
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signal(SIGILL, &crash_handler); // illegal instruction
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signal(SIGFPE, &crash_handler); // floating-point exception
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signal(SIGBUS, &crash_handler); // bus error
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signal(SIGSEGV, &crash_handler); // segmentation violation
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signal(SIGSYS, &crash_handler); // non-existent system call invoked
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#endif
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# if LL_DARWIN
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signal(SIGEMT, &crash_handler); // emulate instruction executed
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LLCocoaPlugin cocoa_interface;
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cocoa_interface.setupCocoa();
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cocoa_interface.createAutoReleasePool();
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#endif //LL_DARWIN
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LLPluginProcessChild *plugin = new LLPluginProcessChild();
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plugin->init(port);
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#if LL_DARWIN
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cocoa_interface.deleteAutoReleasePool();
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#endif
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LLTimer timer;
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timer.start();
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#if LL_WINDOWS
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checkExceptionHandler();
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#endif
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#if LL_DARWIN
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// If the plugin opens a new window (such as the Flash plugin's fullscreen player), we may need to bring this plugin process to the foreground.
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// Use this to track the current frontmost window and bring this process to the front if it changes.
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// cocoa_interface.mEventTarget = GetEventDispatcherTarget();
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#endif
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while(!plugin->isDone())
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{
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#if LL_DARWIN
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cocoa_interface.createAutoReleasePool();
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#endif
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timer.reset();
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plugin->idle();
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#if LL_DARWIN
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{
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cocoa_interface.processEvents();
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}
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#endif
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F64 elapsed = timer.getElapsedTimeF64();
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F64 remaining = plugin->getSleepTime() - elapsed;
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if(remaining <= 0.0f)
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{
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// We've already used our full allotment.
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// LL_INFOS("slplugin") << "elapsed = " << elapsed * 1000.0f << " ms, remaining = " << remaining * 1000.0f << " ms, not sleeping" << LL_ENDL;
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// Still need to service the network...
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plugin->pump();
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}
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else
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{
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// LL_INFOS("slplugin") << "elapsed = " << elapsed * 1000.0f << " ms, remaining = " << remaining * 1000.0f << " ms, sleeping for " << remaining * 1000.0f << " ms" << LL_ENDL;
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// timer.reset();
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// This also services the network as needed.
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plugin->sleep(remaining);
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// LL_INFOS("slplugin") << "slept for "<< timer.getElapsedTimeF64() * 1000.0f << " ms" << LL_ENDL;
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}
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#if LL_WINDOWS
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// More agressive checking of interfering exception handlers.
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// Doesn't appear to be required so far - even for plugins
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// that do crash with a single call to the intercept
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// exception handler such as QuickTime.
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//checkExceptionHandler();
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#endif
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#if LL_DARWIN
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cocoa_interface.deleteAutoReleasePool();
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#endif
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}
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delete plugin;
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ll_cleanup_apr();
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return 0;
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}
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