diff options
Diffstat (limited to 'indra/llplugin/slplugin/slplugin.cpp')
| -rw-r--r-- | indra/llplugin/slplugin/slplugin.cpp | 104 |
1 files changed, 76 insertions, 28 deletions
diff --git a/indra/llplugin/slplugin/slplugin.cpp b/indra/llplugin/slplugin/slplugin.cpp index 005e427572..23dc532ba5 100644 --- a/indra/llplugin/slplugin/slplugin.cpp +++ b/indra/llplugin/slplugin/slplugin.cpp @@ -1,11 +1,13 @@ -/** +/** * @file slplugin.cpp * @brief Loader shell for plugins, intended to be launched by the plugin host application, which directly loads a plugin dynamic library. * + * @cond + * * $LicenseInfo:firstyear=2008&license=viewergpl$ * * Copyright (c) 2008, Linden Research, Inc. - * + * * Second Life Viewer Source Code * The source code in this file ("Source Code") is provided by Linden Lab * to you under the terms of the GNU General Public License, version 2.0 @@ -13,20 +15,22 @@ * ("Other License"), formally executed by you and Linden Lab. Terms of * the GPL can be found in doc/GPL-license.txt in this distribution, or * online at http://secondlife.com/developers/opensource/gplv2 - * + * * There are special exceptions to the terms and conditions of the GPL as * it is applied to this Source Code. View the full text of the exception * in the file doc/FLOSS-exception.txt in this software distribution, or * online at http://secondlife.com/developers/opensource/flossexception - * + * * By copying, modifying or distributing this software, you acknowledge * that you have read and understood your obligations described above, * and agree to abide by those obligations. - * + * * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ + * + * @endcond */ @@ -48,15 +52,15 @@ /* On Mac OS, since we call WaitNextEvent, this process will show up in the dock unless we set the LSBackgroundOnly flag in the Info.plist. - + 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: - + -sectcreate __TEXT __info_plist /path/to/slplugin_info.plist - + which means adding this to the gcc flags: - + -Wl,-sectcreate,__TEXT,__info_plist,/path/to/slplugin_info.plist - + */ #if LL_DARWIN || LL_LINUX @@ -67,7 +71,7 @@ static void crash_handler(int sig) // TODO: add our own crash reporting _exit(1); } -#endif +#endif #if LL_WINDOWS #include <windows.h> @@ -80,7 +84,48 @@ LONG WINAPI myWin32ExceptionHandler( struct _EXCEPTION_POINTERS* exception_infop //std::cerr << "intercepted an unhandled exception and will exit immediately." << std::endl; // TODO: replace exception handler before we exit? - return EXCEPTION_EXECUTE_HANDLER; + return EXCEPTION_EXECUTE_HANDLER; +} + +// Taken from : http://blog.kalmbachnet.de/?postid=75 +// The MSVC 2005 CRT forces the call of the default-debugger (normally Dr.Watson) +// even with the other exception handling code. This (terrifying) piece of code +// patches things so that doesn't happen. +LPTOP_LEVEL_EXCEPTION_FILTER WINAPI MyDummySetUnhandledExceptionFilter( + LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter ) +{ + return NULL; +} + +BOOL PreventSetUnhandledExceptionFilter() +{ +// WARNING: This won't work on 64-bit Windows systems so we turn it off it. +// It should work for any flavor of 32-bit Windows we care about. +// If it's off, sometimes you will see an OS message when a plugin crashes +#ifndef _WIN64 + HMODULE hKernel32 = LoadLibraryA( "kernel32.dll" ); + if ( NULL == hKernel32 ) + return FALSE; + + void *pOrgEntry = GetProcAddress( hKernel32, "SetUnhandledExceptionFilter" ); + if( NULL == pOrgEntry ) + return FALSE; + + unsigned char newJump[ 100 ]; + DWORD dwOrgEntryAddr = (DWORD)pOrgEntry; + dwOrgEntryAddr += 5; // add 5 for 5 op-codes for jmp far + void *pNewFunc = &MyDummySetUnhandledExceptionFilter; + DWORD dwNewEntryAddr = (DWORD) pNewFunc; + DWORD dwRelativeAddr = dwNewEntryAddr - dwOrgEntryAddr; + + newJump[ 0 ] = 0xE9; // JMP absolute + memcpy( &newJump[ 1 ], &dwRelativeAddr, sizeof( pNewFunc ) ); + SIZE_T bytesWritten; + BOOL bRet = WriteProcessMemory( GetCurrentProcess(), pOrgEntry, newJump, sizeof( pNewFunc ) + 1, &bytesWritten ); + return bRet; +#else + return FALSE; +#endif } //////////////////////////////////////////////////////////////////////////////// @@ -91,6 +136,7 @@ void initExceptionHandler() // save old exception handler in case we need to restore it at the end prev_filter = SetUnhandledExceptionFilter( myWin32ExceptionHandler ); + PreventSetUnhandledExceptionFilter(); } bool checkExceptionHandler() @@ -99,6 +145,8 @@ bool checkExceptionHandler() LPTOP_LEVEL_EXCEPTION_FILTER prev_filter; prev_filter = SetUnhandledExceptionFilter(myWin32ExceptionHandler); + PreventSetUnhandledExceptionFilter(); + if (prev_filter != myWin32ExceptionHandler) { LL_WARNS("AppInit") << "Our exception handler (" << (void *)myWin32ExceptionHandler << ") replaced with " << prev_filter << "!" << LL_ENDL; @@ -122,7 +170,7 @@ bool checkExceptionHandler() } #endif -// If this application on Windows platform is a console application, a console is always +// If this application on Windows platform is a console application, a console is always // created which is bad. Making it a Windows "application" via CMake settings but not // adding any code to explicitly create windows does the right thing. #if LL_WINDOWS @@ -133,7 +181,7 @@ int main(int argc, char **argv) { ll_init_apr(); - // Set up llerror logging + // Set up llerror logging { LLError::initForApplication("."); LLError::setDefaultLevel(LLError::LEVEL_INFO); @@ -146,14 +194,14 @@ int main(int argc, char **argv) { LL_ERRS("slplugin") << "usage: " << "SLPlugin" << " launcher_port" << LL_ENDL; }; - + U32 port = 0; if(!LLStringUtil::convertToU32(lpCmdLine, port)) { LL_ERRS("slplugin") << "port number must be numeric" << LL_ENDL; }; - // Insert our exception handler into the system so this plugin doesn't + // Insert our exception handler into the system so this plugin doesn't // display a crash message if something bad happens. The host app will // see the missing heartbeat and log appropriately. initExceptionHandler(); @@ -162,7 +210,7 @@ int main(int argc, char **argv) { LL_ERRS("slplugin") << "usage: " << argv[0] << " launcher_port" << LL_ENDL; } - + U32 port = 0; if(!LLStringUtil::convertToU32(argv[1], port)) { @@ -183,17 +231,17 @@ int main(int argc, char **argv) LLPluginProcessChild *plugin = new LLPluginProcessChild(); plugin->init(port); - + LLTimer timer; timer.start(); #if LL_WINDOWS checkExceptionHandler(); #endif - + while(!plugin->isDone()) { - timer.reset(); + timer.reset(); plugin->idle(); #if LL_DARWIN { @@ -204,7 +252,7 @@ int main(int argc, char **argv) #endif F64 elapsed = timer.getElapsedTimeF64(); F64 remaining = plugin->getSleepTime() - elapsed; - + if(remaining <= 0.0f) { // We've already used our full allotment. @@ -217,26 +265,26 @@ int main(int argc, char **argv) { // LL_INFOS("slplugin") << "elapsed = " << elapsed * 1000.0f << " ms, remaining = " << remaining * 1000.0f << " ms, sleeping for " << remaining * 1000.0f << " ms" << LL_ENDL; -// timer.reset(); - +// timer.reset(); + // This also services the network as needed. plugin->sleep(remaining); - + // LL_INFOS("slplugin") << "slept for "<< timer.getElapsedTimeF64() * 1000.0f << " ms" << LL_ENDL; } #if LL_WINDOWS // More agressive checking of interfering exception handlers. - // Doesn't appear to be required so far - even for plugins - // that do crash with a single call to the intercept + // Doesn't appear to be required so far - even for plugins + // that do crash with a single call to the intercept // exception handler such as QuickTime. //checkExceptionHandler(); #endif } delete plugin; - - ll_cleanup_apr(); + + ll_cleanup_apr(); return 0; } |