Original Post
I'm having trouble locating the cause of a heap corruption I've been getting for last few days. When I debug the corruption doesn't happen in the same place. Visual Studio breaks in a zlib decompression function or in a random fmod call and with Application Verifier, it runs normally, but then breaks in a D3DXSprite call when the player gets to a certain point in the level. I don't even know when this error came up because the debug build never caught it at all. I became aware when someone reported that it wouldn't run on their machine, but it ran fine on mine until I switched to capability mode (I tried all of the options) and I also tried to run it on another machine. I've been trying to solve this for about two weeks now. I tried commenting out portions of code to kind of isolate the problem, but the same thing shows up randomly somewhere else. Any advice will be much appreciated.
Without App Verifier:
Sometimes it breaks in a FMODEX call which I can't debug.
With App Verifier:
if not there it eventually breaks on D3DXSprite::End();
Without App Verifier:
int ResourceManager::Uncompress( const unsigned char *src, long srcSize, unsigned char *dst, long destSize)
{
z_stream strm = {0};
strm.total_in = strm.avail_in = srcSize;
strm.total_out = strm.avail_out = destSize;
strm.next_in = (Bytef *) src;
strm.next_out = (Bytef *) dst;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
int err = -1;
int ret = -1;
err = inflateInit2(&strm, (15));
if (err == Z_OK)
{
err = inflate(&strm, Z_FINISH);
if (err == Z_STREAM_END)
{
ret = strm.total_out;
}
else
{
inflateEnd(&strm);
return err;
}
}
else
{
inflateEnd(&strm);
return err;
}
inflateEnd(&strm); //<-------Breaks In This Function. SEE BELOW
return ret;
}
int ResourceManager::ReadSound( Resource *resource)
{
ResourceSound *res = reinterpret_cast<ResourceSound*>( resource);
FILE *file = NULL;
string fname = WorkingDir + res->Filename;
file = fopen( fname.c_str(), "rb");
if (file == NULL)
{
printf( "Could not read tileset.\n");
res->failed = true;
return -1;
}
long srcSize;
fseek( file, 0, SEEK_END);
srcSize = ftell( file);
fseek( file, 0, SEEK_SET);
unsigned char *srcData = new unsigned char[srcSize];
fread( srcData, 1, srcSize, file);
fclose( file);
long destSize = (srcData[0] << 24) | (srcData[1] << 16) | (srcData[2] << 8) | (srcData[3]);
unsigned char *dest = new unsigned char[destSize];
int uSize = Uncompress( srcData+4, srcSize-4, dest, destSize);//<---------------------- Called Here
if (uSize != destSize)
{
std::string errStr = "For " + res->Name + ", decompressed size of data not equal size written!\n";
printf( errStr.c_str());
res->failed = true;
delete[] srcData;
delete[] dest;
return -1;
}
res->srcId = audioEngine->create_sound_from_data( (char*)dest, destSize, res->Preload);
delete[] srcData;
delete[] dest;
return res->srcId;
}
Sometimes it breaks in a FMODEX call which I can't debug.
With App Verifier:
int DX9RenderEngine::create_sprite_from_data( const unsigned char* data, UINT size, int FrameCount, int FrameWidth, int FrameHeight, float CenterX, float CenterY, Color colkey, bool preload)
{
Sprite *spr = new Sprite;
spr->preload = preload;
D3DXIMAGE_INFO info;
D3DXGetImageInfoFromFileInMemory( data, size, &info); //<------- Breaks in this function
spr->fname = "";
spr->ImageWidth = info.Width;
spr->ImageHeight = info.Height;
spr->FrameCount = FrameCount;
spr->FrameWidth = FrameWidth == -1 ? info.Width : FrameWidth;
spr->FrameHeight = FrameHeight == -1 ? info.Height : FrameHeight;
spr->CenterX = CenterX;
spr->CenterY = CenterY;
spr->ColorKey = colkey;
spr->fromData = true;
spr->data = new unsigned char[size];
memcpy( spr->data, data, size);
spr->dataSize = size;
if (preload)
{
InitializeSprite( spr);
}
return append_sprite( spr);
}
if not there it eventually breaks on D3DXSprite::End();
