Added memory allocation failure tests

Author: homann

src/core/qgsrasterdataprovider.cpp

@@ -101,6 +101,11 @@ void * QgsRasterDataProvider::readBlock( int bandNo, QgsRectangle  const & exten
 
   // TODO: replace VSIMalloc, it is GDAL function
   void * data = VSIMalloc( dataTypeSize( bandNo ) * width * height );
+  if ( ! data )
+  {
+    QgsDebugMsg( QString( "Couldn't allocate data memory of % bytes" ).arg( dataTypeSize( bandNo ) * width * height ) );
+    return 0;
+  }
   readBlock( bandNo, extent, width, height, data );
 
   return data;

src/core/qgsrasterprojector.cpp

@@ -686,6 +686,13 @@ void * QgsRasterProjector::readBlock( int bandNo, QgsRectangle  const & extent,
   int outputSize = width * height * pixelSize;
   void * outputData = malloc( outputSize );
 
+  // Check for allcoation error
+  if ( ! outputData )
+  {
+    QgsDebugMsg( QString( "Couldn't malloc %1 bytes!" ).arg( outputSize ) );
+    free( inputData );
+    return 0;
+  }
   // TODO: fill by transparent
 
   int srcRow, srcCol;

src/core/raster/qgsmultibandcolorrenderer.cpp

@@ -195,7 +195,17 @@ void * QgsMultiBandColorRenderer::readBlock( int bandNo, QgsRectangle  const & e
   for ( ; bandIt != bands.constEnd(); ++bandIt )
   {
     bandData[*bandIt] =  mInput->block( *bandIt, extent, width, height );
-    if ( !bandData[*bandIt] ) return 0;
+    if ( !bandData[*bandIt] )
+    {
+      // We should free the alloced mem from block().
+      QgsDebugMsg("No input band" );      
+      bandIt--;
+      for ( ; bandIt != bands.constBegin(); bandIt-- )
+      {
+	VSIFree( bandData[*bandIt] );
+      }
+      return 0;
+    }
   }
 
   if ( mRedBand > 0 )
@@ -216,6 +226,17 @@ void * QgsMultiBandColorRenderer::readBlock( int bandNo, QgsRectangle  const & e
   }
 
   QImage img( width, height, QImage::Format_ARGB32_Premultiplied );
+  if ( img.isNull() )
+  {
+    QgsDebugMsg( "Could not create QImage" );
+    bandIt = bands.constBegin();
+    for ( ; bandIt != bands.constEnd(); ++bandIt )
+    {
+      VSIFree( bandData[*bandIt] );
+    }
+    return 0;
+  }
+
   QRgb* imageScanLine = 0;
   int currentRasterPos = 0;
   int redVal = 0;
@@ -334,6 +355,11 @@ void * QgsMultiBandColorRenderer::readBlock( int bandNo, QgsRectangle  const & e
   }
 
   void * data = VSIMalloc( img.byteCount() );
+  if ( ! data )
+  {
+    QgsDebugMsg( QString( "Couldn't allocate output data memory of % bytes" ).arg( img.byteCount() ) );
+    return 0;
+  }
   return memcpy( data, img.bits(), img.byteCount() );
 }
 

src/core/raster/qgspalettedrasterrenderer.cpp

@@ -103,6 +103,12 @@ void * QgsPalettedRasterRenderer::readBlock( int bandNo, QgsRectangle  const & e
 
   QgsRasterInterface::DataType rasterType = ( QgsRasterInterface::DataType )mInput->dataType( mBandNumber );
   void* rasterData = mInput->block( bandNo, extent, width, height );
+  if ( ! rasterData )
+  {
+    QgsDebugMsg("No raster data!" );
+    return 0;
+  }
+
   double currentOpacity = mOpacity;
 
   //rendering is faster without considering user-defined transparency
@@ -120,6 +126,13 @@ void * QgsPalettedRasterRenderer::readBlock( int bandNo, QgsRectangle  const & e
 
   //create image
   QImage img( width, height, QImage::Format_ARGB32_Premultiplied );
+  if ( img.isNull() )
+  {
+    QgsDebugMsg( "Could not create QImage" );
+    VSIFree( rasterData );
+    return 0;
+  }
+
   QRgb* imageScanLine = 0;
   int val = 0;
   int currentRasterPos = 0;
@@ -174,7 +187,13 @@ void * QgsPalettedRasterRenderer::readBlock( int bandNo, QgsRectangle  const & e
   }
 
   VSIFree( rasterData );
+
   void * data = VSIMalloc( img.byteCount() );
+  if ( ! data )
+  {
+    QgsDebugMsg( QString( "Couldn't allocate output data memory of % bytes" ).arg( img.byteCount() ) );
+    return 0;
+  }
   return memcpy( data, img.bits(), img.byteCount() );
 }
 

src/core/raster/qgssinglebandcolordatarenderer.cpp

@@ -62,9 +62,21 @@ void * QgsSingleBandColorDataRenderer::readBlock( int bandNo, QgsRectangle  cons
   bool hasTransparency = usesTransparency();
 
   void* rasterData = mInput->block( bandNo, extent, width, height );
+  if ( ! rasterData )
+  {
+    QgsDebugMsg("No raster data!" );
+    return 0;
+  }
 
   currentRasterPos = 0;
   QImage img( width, height, QImage::Format_ARGB32 );
+  if ( img.isNull() )
+  {
+    QgsDebugMsg( "Could not create QImage" );
+    VSIFree( rasterData );
+    return 0;
+  }
+
   uchar* scanLine = 0;
   for ( int i = 0; i < height; ++i )
   {
@@ -91,6 +103,11 @@ void * QgsSingleBandColorDataRenderer::readBlock( int bandNo, QgsRectangle  cons
   VSIFree( rasterData );
 
   void * data = VSIMalloc( img.byteCount() );
+  if ( ! data )
+  {
+    QgsDebugMsg( QString( "Couldn't allocate output data memory of % bytes" ).arg( img.byteCount() ) );
+    return 0;
+  }
   return memcpy( data, img.bits(), img.byteCount() );
 }
 

src/core/raster/qgssinglebandpseudocolorrenderer.cpp

@@ -89,6 +89,11 @@ void * QgsSingleBandPseudoColorRenderer::readBlock( int bandNo, QgsRectangle  co
   QgsRasterInterface::DataType rasterType = ( QgsRasterInterface::DataType )mInput->dataType( mBand );
 
   void* rasterData = mInput->block( mBand, extent, width, height );
+  if ( ! rasterData )
+  {
+    QgsDebugMsg("No raster data!" );
+    return 0;
+  }
 
   int red, green, blue;
   QRgb myDefaultColor = qRgba( 255, 255, 255, 0 );
@@ -107,6 +112,13 @@ void * QgsSingleBandPseudoColorRenderer::readBlock( int bandNo, QgsRectangle  co
 
   //create image
   QImage img( width, height, QImage::Format_ARGB32_Premultiplied );
+  if ( img.isNull() )
+  {
+    QgsDebugMsg( "Could not create QImage" );
+    VSIFree( rasterData );
+    return 0;
+  }
+
   QRgb* imageScanLine = 0;
   double val = 0;
 
@@ -156,6 +168,11 @@ void * QgsSingleBandPseudoColorRenderer::readBlock( int bandNo, QgsRectangle  co
   VSIFree( rasterData );
 
   void * data = VSIMalloc( img.byteCount() );
+  if ( ! data )
+  {
+    QgsDebugMsg( QString( "Couldn't allocate output data memory of % bytes" ).arg( img.byteCount() ) );
+    return 0;
+  }
   return memcpy( data, img.bits(), img.byteCount() );
 }
 

src/providers/gdal/qgsgdalprovider.cpp

@@ -520,7 +520,11 @@ void QgsGdalProvider::readBlock( int theBandNo, QgsRectangle  const & theExtent,
 
   // Allocate temporary block
   char *tmpBlock = ( char * )malloc( dataSize * tmpWidth * tmpHeight );
-
+  if ( ! tmpBlock )
+  {
+    QgsDebugMsg( QString( "Coudn't allocate temporary buffer of %1 bytes" ).arg( dataSize * tmpWidth * tmpHeight ) );
+    return;
+  }
   GDALRasterBandH gdalBand = GDALGetRasterBand( mGdalDataset, theBandNo );
   GDALDataType type = ( GDALDataType )mGdalDataType[theBandNo-1];
   CPLErrorReset();

src/providers/wcs/qgswcsprovider.cpp

@@ -537,6 +537,11 @@ void QgsWcsProvider::readBlock( int bandNo, QgsRectangle  const & viewExtent, in
       QgsDebugMsg( QString( "pixelSize = %1" ).arg( pixelSize ) );
       int size = width * height * pixelSize;
       void * tmpData = malloc( size );
+      if ( ! tmpData )
+      {
+        QgsDebugMsg( QString( "Couldn't allocate memory of %1 bytes" ).arg( size ) );
+        return;
+      }
       GDALRasterIO( gdalBand, GF_Read, 0, 0, width, height, tmpData, width, height, ( GDALDataType ) mGdalDataType[bandNo-1], 0, 0 );
       for ( int i = 0; i < pixelHeight; i++ )
       {

src/providers/wms/qgswmsprovider.cpp

@@ -968,7 +968,11 @@ void QgsWmsProvider::readBlock( int bandNo, QgsRectangle  const & viewExtent, in
   }
 
   uchar * ptr = image->bits() ;
-  memcpy( block, ptr, myExpectedSize );
+  if ( ptr )
+  {
+    // If image is too large, ptr can be NULL
+    memcpy( block, ptr, myExpectedSize );
+  }
   // do not delete the image, it is handled by draw()
   //delete image;
 }