Add check for executable stack/heap when rating Linux exploitability.

src/google_breakpad/processor/minidump.h

 // Copyright (c) 2010 Google 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:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 898 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(MinidumpLinuxMaps);
 };
 
 // MinidumpLinuxMapsList corresponds to the Linux-exclusive MD_LINUX_MAPS
 // stream, which contains the contents of /prod/self/maps, which contains
 // the mapped memory regions and their access permissions.
 class MinidumpLinuxMapsList : public MinidumpStream {
  public:
   virtual ~MinidumpLinuxMapsList();
 
+  // Get number of mappings.
+  unsigned int get_maps_count() const { return valid_ ? maps_count_ : 0; }
+
   // Get mapping at the given memory address. The caller owns the pointer.
   const MinidumpLinuxMaps *GetLinuxMapsForAddress(uint64_t address) const;
   // Get mapping at the given index. The caller owns the pointer.
   const MinidumpLinuxMaps *GetLinuxMapsAtIndex(unsigned int index) const;
 
   // Print the contents of /proc/self/maps to stdout.
   void Print() const;
 
  private:
   friend class Minidump;
@@ skipping 189 matching lines @@
   // construction or after a failed Read(); true following a successful
   // Read().
   bool                      valid_;
 };
 
 
 }  // namespace google_breakpad
 
 
 #endif  // GOOGLE_BREAKPAD_PROCESSOR_MINIDUMP_H__