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From "Jamie Lyon">
Subject RE: Possible to have two stubs active at the same time?
Date Tue, 11 Sep 2007 15:31:25 GMT
Sorry, forgot to mention the error that caused the stack trace. It is as follows:

*** glibc detected *** /home/jl/axistest/cpp/examples/example2: double free or corruption
(out): 0x081c60d0 ***


From: Jamie Lyon [] 
Sent: 11 September 2007 16:25
To: Apache AXIS C Developers List
Subject: Possible to have two stubs active at the same time?


Is it possible to have two 'axis2_stub_t's active at any one time? When I try to free the
objects I get the stack trace included at the end of the message.

This is upon freeing the second axis2_stub. If I delete the first before creating the second
it works perfectly fine, it's only if they're both created at the same time.

I should also note that this only appears to happen if both stubs have sent a message, if
either one has only been created, and not actually used, both can be freed without any incident.

The general steps are as follows:
1) Create axutil_env_t
2) Create neethi_policy
3) Create stub 1 from axutil_env_t and neethi_policy
4) Create a second neethi_policy
5) Create stub 2 from axutil_env_t and second neethi_policy (also tried with a second, separate
axutil_env_t, to no avail)
6) Send a message from stub 1
7) Send a message from stub 2
8) Free stub 1
9) Free stub 2 (crash)

If you cannot reproduce this, I will try and write a test case.

Is this a known problem?



#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7c74770 in raise () from /lib/tls/i686/cmov/
#2  0xb7c75ef3 in abort () from /lib/tls/i686/cmov/
#3  0xb7ca9d0b in __fsetlocking () from /lib/tls/i686/cmov/
#4  0xb7cb18bd in mallopt () from /lib/tls/i686/cmov/
#5  0xb7cb1a44 in free () from /lib/tls/i686/cmov/
#6  0xb7b0045f in xmlCharEncCloseFunc () from /usr/lib/
#7  0xb7b2b97f in xmlFreeParserInputBuffer () from /usr/lib/
#8  0xb7b04858 in xmlFreeInputStream () from /usr/lib/
#9  0xb7b048a8 in xmlFreeParserCtxt () from /usr/lib/ #10 0xb7bb052d in xmlFreeTextReader
() from /usr/lib/
#11 0xb7f1984d in axis2_libxml2_reader_wrapper_free (parser=0x81423c8,
    env=0x80e81f0) at libxml2_reader_wrapper.c:475
#12 0xb7f18788 in axiom_xml_reader_free (parser=0x81423c8, env=0x80e81f0)
    at ../xml_reader.c:31
#13 0xb7f7976a in axiom_stax_builder_free (om_builder=0x813dc20, env=0x80e81f0)
    at om_stax_builder.c:825
#14 0xb7f82e26 in axiom_soap_builder_free (soap_builder=0x8142a58,
    env=0x80e81f0) at soap_builder.c:177
#15 0xb7f81adf in axiom_soap_envelope_free (soap_envelope=0x8156160,
    env=0x80e81f0) at soap_envelope.c:162
#16 0xb7f528bc in axis2_msg_ctx_free (msg_ctx=0x81409d0, env=0x80e81f0)
    at msg_ctx.c:327
#17 0xb7f52fde in axis2_op_ctx_free (op_ctx=0x814d4a8, env=0x80e81f0)
    at op_ctx.c:145
#18 0xb7f58956 in axis2_op_client_free (op_client=0x814d470, env=0x80e81f0)
    at op_client.c:582
#19 0xb7f59a48 in axis2_svc_client_free (svc_client=0x80e83d8, env=0x80e81f0)
    at svc_client.c:1164
#20 0xb7f566b2 in axis2_stub_free (stub=0x80e83c8, env=0x80e81f0) at stub.c:126 ...

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