Add safe FX_Alloc2D() macro

core/src/fpdfapi/fpdf_render/fpdf_render_cache.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../include/fpdfapi/fpdf_render.h"
 #include "../../../include/fpdfapi/fpdf_pageobj.h"
 #include "../../../include/fxge/fx_ge.h"
 #include "../fpdf_page/pageint.h"
@@ skipping 25 matching lines @@
     m_ImageCaches.RemoveAll();
     m_nCacheSize = 0;
     m_nTimeCount = 0;
 }
 void CPDF_PageRenderCache::CacheOptimization(FX_INT32 dwLimitCacheSize)
 {
     if (m_nCacheSize <= (FX_DWORD)dwLimitCacheSize) {
         return;
     }
     int nCount = m_ImageCaches.GetCount();
-    CACHEINFO* pCACHEINFO = (CACHEINFO*)FX_Alloc(FX_BYTE, (sizeof (CACHEINFO)) * nCount);
+    CACHEINFO* pCACHEINFO = (CACHEINFO*)FX_Alloc2D(FX_BYTE, sizeof(CACHEINFO), nCount);
     FX_POSITION pos = m_ImageCaches.GetStartPosition();
     int i = 0;
     while (pos) {
         FX_LPVOID key, value;
         m_ImageCaches.GetNextAssoc(pos, key, value);
         pCACHEINFO[i].time = ((CPDF_ImageCache*)value)->GetTimeCount();
         pCACHEINFO[i++].pStream = ((CPDF_ImageCache*)value)->GetStream();
     }
     FXSYS_qsort(pCACHEINFO, nCount, sizeof (CACHEINFO), compare);
     FX_DWORD nTimeCount = m_nTimeCount;
@@ skipping 289 matching lines @@
 }
 void CPDF_Document::ClearRenderFont()
 {
     if (m_pDocRender) {
         CFX_FontCache* pCache = m_pDocRender->GetFontCache();
         if (pCache) {
             pCache->FreeCache(FALSE);
         }
     }
 }