TraverseSchema allocates from the wrong memory manager...
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Key: XERCESC-1376
URL: http://issues.apache.org/jira/browse/XERCESC-1376
Project: Xerces-C++
Type: Bug
Components: Validating Parser (Schema) (Xerces 1.5 or up only)
Versions: 2.6.0
Environment: all
Reporter: Christian Will
Priority: Critical
Attachments: TraverseSchema.cpp.patch
Hi,
TraverseSchema allocates from the wrong memory manager. It creates the
DatatypeValidator(...) with the memory manager from the parser instance instead
of the grammar pool.
Here is a short example how I found this bug. I created 4 memory manager each
for platformutils, two paser, and the grammar pool. Both parser are using the
same grammar pool. I cached the grammar with the first parser and tried to
parse the instance document with the second parser. This should work also if I
delete the first parser and the associated memory manager after I load the
grammar. But after I deleted the first parser instance I still can see that
there is memory allocated with the associated memory manager. And If I delete
the memory manager from the first parser and try to parse the instance document
with the second parser it crashes.
I could locate all of the wrong memory allocations in TraverseSchema.cpp, where
we call createDatatypeValidator(...). I changed the parameters that we use the
memory manager from the grammar pool. And with my changes we can see that there
is no more memory allocated when I delete the first parser and we can parse the
instance document with the second parser.
(Patch file will be attached.)
Regards,
Christian Will
Original
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init...
PlatformUtils: 172842 [ 172842]bytes, 2855 [ 3918, 1162]blocks (0)
Parser One : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
Parser Two : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
GrammarPool : 1214 [ 1214]bytes, 20 [ 20, 0]blocks (0)
cache grammar... (T:/testfiles/CROSSWORLDS/schemas/Customer.xsd)
PlatformUtils: 173370 [ 173370]bytes, 2868 [ 3933, 1164]blocks (2)
Parser One : 75950 [ 415896]bytes, 692 [ 3550, 3514]blocks (5)
Parser Two : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
GrammarPool : 692420 [ 1980110]bytes, 9270 [ 18488, 12503]blocks (7)
delete parser1...
PlatformUtils: 173370 [ 173370]bytes, 2868 [ 3933, 1164]blocks (0)
Parser One : 49494 [ 415896]bytes, 591 [ 3550, 3618]blocks (0)
Parser Two : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
GrammarPool : 692420 [ 1980110]bytes, 9270 [ 18488, 12503]blocks (0)
delete memory manager from parser1!...
PlatformUtils: 173370 [ 173370]bytes, 2868 [ 3933, 1164]blocks (0)
Parser Two : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
GrammarPool : 692420 [ 1980110]bytes, 9270 [ 18488, 12503]blocks (0)
parse with parser2...
(T:/testfiles/CROSSWORLDS/data/Customer/Customer.synth_1,228.xml)
...error...
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With changes
---------------------------------------------------------------------------------------
init...
PlatformUtils: 172842 [ 172842]bytes, 2855 [ 3918, 1162]blocks (0)
Parser One : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
Parser Two : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
GrammarPool : 1214 [ 1214]bytes, 20 [ 20, 0]blocks (0)
cache grammar... (T:/testfiles/CROSSWORLDS/schemas/Customer.xsd)
PlatformUtils: 173370 [ 173370]bytes, 2868 [ 3933, 1164]blocks (2)
Parser One : 26456 [ 415896]bytes, 101 [ 2312, 2867]blocks (5)
Parser Two : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
GrammarPool : 741914 [ 2029604]bytes, 9861 [ 19726, 13150]blocks (7)
delete parser1...
PlatformUtils: 173370 [ 173370]bytes, 2868 [ 3933, 1164]blocks (0)
Parser Two : 26456 [ 26456]bytes, 101 [ 101, 0]blocks (0)
GrammarPool : 741914 [ 2029604]bytes, 9861 [ 19726, 13150]blocks (0)
parse with parser2...
(T:/testfiles/CROSSWORLDS/data/Customer/Customer.synth_1,228.xml)
PlatformUtils: 173370 [ 173370]bytes, 2868 [ 3933, 1164]blocks (0)
Parser Two : 59074 [ 223634]bytes, 523 [ 580, 227]blocks (39)
GrammarPool : 745050 [ 2029604]bytes, 9877 [ 19766, 13174]blocks (6)
delete parser2...
PlatformUtils: 173370 [ 173370]bytes, 2868 [ 3933, 1164]blocks (0)
GrammarPool : 745050 [ 2029604]bytes, 9877 [ 19766, 13174]blocks (0)
delete grammarPool...
PlatformUtils: 173370 [ 173370]bytes, 2868 [ 3933, 1164]blocks (0)
terminate PlatformUtils...
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