[svn-r21870] Purpose:

  Fix for HDFFV-7840 h5repack: memory leak over one of the h5diff test file

Description:
  Turned out that there were two causes of memory leaks.
  1. for handling variable length string in attribute. 
  2. for handling compound type with non-reference members.  
  The first issue is fixed in copy_attr() which is updated to use h5tools_detect_vlen to take care of vlen string as well as vlen data. 
  The second is fixed in copy_refs_attr() of compound handling code.
  Merged from HDF5 trunk r21869.
  
Tested:
 jam (linux32-LE), koala (linux64-LE), heiwa (linuxppc64-BE), tejeda (mac32-LE), linew (solaris-BE),  Windows (32-LE cmake), Cmake (jam)

1 files changed, 17 insertions, 0 deletions

diff --git a/tools/h5repack/h5repack_refs.c b/tools/h5repack/h5repack_refs.c
index c6753c1..f7103ad 100644
--- a/tools/h5repack/h5repack_refs.c
+++ b/tools/h5repack/h5repack_refs.c
@@ -533,6 +533,23 @@ static int copy_refs_attr(hid_t loc_in,
         		}
         		H5Tclose(mtid);
         	}
+            
+            /* if don't contain reference type, free malloc for continue 
+             * and malloc again later */
+            if (!ref_comp_field_n) 
+            {
+                if (ref_comp_index) 
+                {
+                	HDfree(ref_comp_index);
+                	ref_comp_index = NULL;
+                }
+
+                if (ref_comp_size) 
+                {
+            	    HDfree(ref_comp_size);
+        	        ref_comp_size = NULL;
+                }
+            }
         }
 
         is_ref_comp = (ref_comp_field_n > 0);