[SOLVED] Corrupted Heap

C++ coding using Panda3D
#1

Hello,

when i was testing panda3d bullet i faced the following issue:
when my test program is closed, visual studio 2008 warns of corrupted heap. i have panda3d built with optimization=1 and bullet is also a debug version. after some testing i found that the following three lines are enough to produce the problem:

//plane
BulletPlaneShape plane_shape(LVector3f(0, 0, 1), 1);
BulletRigidBodyNode plane_node(“plane”);
plane_node.add_shape(&plane_shape);

if the third line is commented, the error doesn’t appear!!

here is the call stack:
//================================================================================

msvcr90d.dll!_CrtIsValidHeapPointer(const void * pUserData=0x0013f88c) Line 2103 C++
msvcr90d.dll!_msize_dbg(void * pUserData=0x0013f88c, int nBlockUse=1) Line 1511 + 0x9 bytes C++
msvcr90d.dll!_msize(void * pUserData=0x0013f88c) Line 1459 + 0xb bytes C++
libpandaexpress_d.dll!MemoryUsage::win32_malloc_hook(int alloc_type=3, void * ptr=0x0013f88c, unsigned int size=0, int block_use=1, long request=0, const unsigned char * filename=0x00000000, int line=0) Line 346 + 0xc bytes C++
msvcr90d.dll!_free_dbg_nolock(void * pUserData=0x0013f88c, int nBlockUse=1) Line 1305 + 0x21 bytes C++
msvcr90d.dll!_free_dbg(void * pUserData=0x0013f88c, int nBlockUse=1) Line 1258 + 0xd bytes C++
msvcr90d.dll!free(void * pUserData=0x0013f88c) Line 49 + 0xb bytes C++
libp3dtool_d.dll!MemoryHook::heap_free_single(void * ptr=0x0013f890) Line 242 + 0xc bytes C++
libpandaexpress_d.dll!MemoryUsage::heap_free_single(void * ptr=0x0013f890) Line 252 + 0xf bytes C++
libp3dtool_d.dll!MemoryBase::operator delete(void * ptr=0x0013f890) Line 73 + 0x1d bytes C++
libpandabullet_d.dll!BulletPlaneShape::vector deleting destructor'() + 0x73 bytes C++ libpandabullet_d.dll!unref_delete<BulletConstraint>(BulletConstraint * ptr=0x0013f890) Line 362 + 0x22 bytes C++ libpandabullet_d.dll!PointerToBase<BulletShape>::reassign(BulletShape * ptr=0x00000000) Line 79 + 0x9 bytes C++ libpandabullet_d.dll!PointerToBase<BulletShape>::~PointerToBase<BulletShape>() Line 47 C++ libpandabullet_d.dll!PointerTo<BulletShape>::~PointerTo<BulletShape>() Line 46 + 0xf bytes C++ libpandabullet_d.dll!PointerTo<BulletShape>::scalar deleting destructor’() + 0x17 bytes C++
libpandabullet_d.dll!std::_Destroy<PointerTo >(PointerTo * _Ptr=0x03e41b00) Line 60 C++
libpandabullet_d.dll!std::allocator<PointerTo >::destroy(PointerTo * _Ptr=0x03e41b00) Line 160 + 0x9 bytes C++
libpandabullet_d.dll!std::_Destroy_range<pallocator_array<PointerTo > >(PointerTo * _First=0x03e41b00, PointerTo * _Last=0x03e41b04, pallocator_array<PointerTo > & _Al={…}, std::_Nonscalar_ptr_iterator_tag __formal={…}) Line 234 + 0xc bytes C++
libpandabullet_d.dll!std::_Destroy_range<pallocator_array<PointerTo > >(PointerTo * _First=0x03e41b00, PointerTo * _Last=0x03e41b04, pallocator_array<PointerTo > & _Al={…}) Line 225 + 0x29 bytes C++
libpandabullet_d.dll!std::vector<PointerTo,pallocator_array<PointerTo > >::_Destroy(PointerTo * _First=0x03e41b00, PointerTo * _Last=0x03e41b04) Line 1119 + 0x14 bytes C++
libpandabullet_d.dll!std::vector<PointerTo,pallocator_array<PointerTo > >::_Tidy() Line 1132 C++
libpandabullet_d.dll!std::vector<PointerTo,pallocator_array<PointerTo > >::~vector<PointerTo,pallocator_array<PointerTo > >() Line 560 C++
libpandabullet_d.dll!pvector<PointerTo >::~pvector<PointerTo >() + 0x43 bytes C++
libpandabullet_d.dll!ReferenceCountedVector<PointerTo >::~ReferenceCountedVector<PointerTo >() Line 59 + 0xf bytes C++
libpandabullet_d.dll!ReferenceCountedVector<PointerTo >::scalar deleting destructor'() + 0x16 bytes C++ libpandabullet_d.dll!unref_delete<ReferenceCountedVector<PointerTo<BulletConstraint> > >(ReferenceCountedVector<PointerTo<BulletConstraint> > * ptr=0x01eb04cc) Line 362 + 0x22 bytes C++ libpandabullet_d.dll!PointerToBase<ReferenceCountedVector<PointerTo<BulletConstraint> > >::reassign(ReferenceCountedVector<PointerTo<BulletConstraint> > * ptr=0x00000000) Line 79 + 0x9 bytes C++ libpandabullet_d.dll!PointerToBase<ReferenceCountedVector<PointerTo<BulletConstraint> > >::~PointerToBase<ReferenceCountedVector<PointerTo<BulletConstraint> > >() Line 47 C++ libpandabullet_d.dll!PointerToArrayBase<PointerTo<BulletConstraint> >::~PointerToArrayBase<PointerTo<BulletConstraint> >() Line 170 + 0xf bytes C++ libpandabullet_d.dll!PointerToArray<PointerTo<BulletConstraint> >::~PointerToArray<PointerTo<BulletConstraint> >() + 0x43 bytes C++ libpandabullet_d.dll!BulletBodyNode::~BulletBodyNode() Line 29 + 0x12 bytes C++ libpandabullet_d.dll!BulletRigidBodyNode::~BulletRigidBodyNode() Line 26 + 0xf bytes C++ libpandabullet_d.dll!BulletRigidBodyNode::vbase destructor’() + 0x17 bytes C++
test_project.exe!main(int argc=1, char * * argv=0x0200a730) Line 689 + 0x1c bytes C++
test_project.exe!__tmainCRTStartup() Line 586 + 0x19 bytes C
test_project.exe!mainCRTStartup() Line 403 C
//================================================================================

is anybody else having this issue???

thank you in advance for any help.

#2

Welcome to the forums!

This is because those classes are reference counted and supposed to be allocated on the heap, not on the stack. This would be the correct code:

PT(BulletPlaneShape) plane_shape = new BulletPlaneShape(LVector3f(0, 0, 1), 1);
PT(BulletRigidBodyNode) plane_node = new BulletPlaneShape("plane");
plane_node->add_shape(plane_shape);

PS. I’ve moved your thread to the appropriate forum.

#3

rdb, Thank you very much for your quick response and for transfering the subject to the proper forum. :smiley: