Sptr.cxx
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上传日期:2013-07-25
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- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const Sptr_cxx_Version =
- "$Id: Sptr.cxx,v 1.10 2001/04/27 11:02:51 bko Exp $";
- #include "Sptr.hxx"
- #ifdef __linux__
- #include <execinfo.h>
- #endif
- #include <stdio.h>
- #define SPTR_TRACEBACK_RUNNING 0
- /// this C file is only used for debugging, so it is totally ifdef'ed
- #define SPTR_DEBUG_ACTIVE 0
- #if SPTR_DEBUG
- // static item
- SptrDebugger* SptrDebugger::impl_ = 0;
- SptrDebugger::SptrDebugger()
- : ptrsInUse(),
- mutex()
- {}
- SptrDebugger* SptrDebugger::getInstance()
- {
- if (!impl_)
- {
- impl_ = new SptrDebugger;
- }
- assert(impl_);
- return impl_;
- }
- void SptrDebugger::newPtr(void* ptr)
- {
- #if SPTR_DEBUG_ACTIVE
- if (ptr == 0)
- {
- // do nothing for the null ptr.
- return ;
- }
- PtrMap::iterator i;
- getInstance()->mutex.lock();
- i = getInstance()->ptrsInUse.find(ptr);
- if (i != getInstance()->ptrsInUse.end())
- {
- // check to see if it's set to inUse
- if (i->second)
- {
- cerr << "pointer " << ptr
- << " already in a different Sptr" << endl;
- assert(0);
- }
- }
- getInstance()->ptrsInUse[ptr] = true;
- getInstance()->mutex.unlock();
- #endif
- }
- void SptrDebugger::deletePtr(void* ptr)
- {
- #if SPTR_DEBUG_ACTIVE
- PtrMap::iterator i;
- getInstance()->mutex.lock();
- i = getInstance()->ptrsInUse.find(ptr);
- if (i == getInstance()->ptrsInUse.end())
- {
- cerr << "pointer " << ptr
- << " is not in any Sptr" << endl;
- assert(0);
- }
- else
- {
- if (i->second == false)
- {
- cerr << "pointer " << ptr
- << " was already deleted by another Sptr" << endl;
- assert(0);
- }
- else
- {
- getInstance()->ptrsInUse[ptr] = false;
- }
- }
- getInstance()->mutex.unlock();
- #endif
- }
- #endif
- #if SPTR_TRACEBACK
- #if SPTR_TRACEBACK_RUNNING
- #ifdef __linux__
- class SptrTraceback
- {
- public:
- SptrTraceback();
- SptrTraceback(const SptrTraceback& x);
- SptrTraceback(void* sptr);
- bool operator==(const SptrTraceback& x) const;
- SptrTraceback& operator=(const SptrTraceback& x);
- void dump(FILE* f);
- private:
- void* sptr;
- void *my_backtrace[50];
- int backtrace_size;
- };
- SptrTraceback::SptrTraceback()
- : sptr(0),
- backtrace_size(0)
- {
- }
- SptrTraceback::SptrTraceback(const SptrTraceback& x)
- : sptr(x.sptr),
- backtrace_size(x.backtrace_size)
- {
- for (int i = 0; i < backtrace_size; i++)
- {
- my_backtrace[i] = x.my_backtrace[i];
- }
- }
- SptrTraceback::SptrTraceback(void* sptr)
- : sptr(sptr),
- backtrace_size(0)
- {
- backtrace_size = backtrace(my_backtrace, 50);
- }
- bool SptrTraceback::operator==(const SptrTraceback& x) const
- {
- return sptr == x.sptr;
- }
- SptrTraceback& SptrTraceback::operator=(const SptrTraceback& x)
- {
- sptr = x.sptr;
- backtrace_size = x.backtrace_size;
- for (int i = 0; i < backtrace_size; i++)
- {
- my_backtrace[i] = x.my_backtrace[i];
- }
- return *this;
- }
- void SptrTraceback::dump(FILE* f)
- {
- fprintf(f, " %p:", sptr);
- for (int i = 0; i < backtrace_size; i++)
- {
- fprintf(f, " %p", my_backtrace[i]);
- }
- fprintf(f, "n");
- }
- struct ptr_less : public binary_function < void*, void*, bool >
- {
- bool operator()(void* const & x, void* const & y) const
- {
- return ((unsigned int) x) < ((unsigned int) y);
- }
- };
- //////////////////////////////////////////////////////////////////////
- class SptrTracebackPack
- {
- public:
- SptrTracebackPack();
- SptrTracebackPack(const SptrTracebackPack& x);
- SptrTracebackPack(void* myPtr, void* sptr);
- void insert(void* sptr);
- void clear(void* sptr);
- void dump(FILE* f);
- private:
- void* ptr;
- map < void*, SptrTraceback, ptr_less > tracebacks;
- };
- SptrTracebackPack::SptrTracebackPack(void* myPtr, void* sptr)
- : ptr(myPtr),
- tracebacks()
- {
- insert(sptr);
- }
- SptrTracebackPack::SptrTracebackPack()
- : ptr(0),
- tracebacks()
- {
- }
- SptrTracebackPack::SptrTracebackPack(const SptrTracebackPack& x)
- : ptr(x.ptr),
- tracebacks(x.tracebacks)
- {
- }
- void SptrTracebackPack::insert(void* sptr)
- {
- SptrTraceback t(sptr);
- tracebacks[sptr] = t;
- }
- void SptrTracebackPack::clear(void* sptr)
- {
- tracebacks.erase(tracebacks.find(sptr));
- }
- void SptrTracebackPack::dump(FILE* f)
- {
- map < void*, SptrTraceback, ptr_less > ::iterator i = tracebacks.begin();
- fprintf(f, "%p>n", ptr);
- while (i != tracebacks.end())
- {
- i->second.dump(f);
- ++i;
- }
- }
- typedef map < void*, SptrTracebackPack > TraceMap;
- static TraceMap tracemap;
- void sptrDebugMarkTraceback(void* sptr, void* ptr)
- {
- TraceMap::iterator i;
- if(ptr)
- {
- i = tracemap.find(ptr);
- if (i != tracemap.end())
- {
- i->second.insert(sptr);
- }
- else
- {
- tracemap[ptr] = SptrTracebackPack(ptr, sptr);
- }
- }
- }
- void sptrDebugClearTraceback(void* sptr, void* ptr)
- {
- TraceMap::iterator i;
- if(ptr)
- {
- i = tracemap.find(ptr);
- if (i != tracemap.end())
- {
- i->second.clear(sptr);
- }
- else
- {
- assert(0);
- }
- }
- }
- void sptrDebugDumpTraceback(char* filename)
- {
- // open file, and dump
- FILE* f;
- f = fopen(filename, "w");
- if (!f)
- {
- return ;
- }
- TraceMap::iterator i = tracemap.begin();
- while (i != tracemap.end())
- {
- // dump the record
- i->second.dump(f);
- ++i;
- }
- fclose(f);
- }
- #else
- // no linux -- these functions do nothing
- void sptrDebugMarkTraceback(void* sptr, void* ptr)
- {
- }
- void sptrDebugClearTraceback(void* sptr, void* ptr)
- {
- }
- void sptrDebugDumpTraceback(char* filename)
- {
- }
- // #if __linux__
- #endif
- // #if __linux__
- // #if SPTR_TRACEBACK_RUNNING
- #else
- // #if SPTR_TRACEBACK_RUNNING
- void sptrDebugMarkTraceback(void* sptr, void* ptr)
- {
- }
- void sptrDebugClearTraceback(void* sptr, void* ptr)
- {
- }
- void sptrDebugDumpTraceback(char* filename)
- {
- }
- // #if SPTR_TRACEBACK_RUNNING
- #endif
- // #if SPTR_TRACEBACK_RUNNING
- // #if SPTR_TRACEBACK
- #endif
- // #if SPTR_TRACEBACK