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https://issues.apache.org/jira/browse/QPID-5663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13960245#comment-13960245
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Chuck Rolke commented on QPID-5663:
-----------------------------------
This is not a regression. I dredged up a build from November 2013 and it has
the same issue.
Receiving populated map messages, Amqp 1.0, on Windows has never worked in qpid
messaging.
I tried a few things to characterize the failure.
1. Get map_sender to send less and less in the map. When the map is finally
empty then the error goes away and an empty "{}" is printed. With anything in
the map then it fails.
2. The failure and the divergence between 0-10 and 1.0 shows up in
MessageImpl::updated()
{code}
void MessageImpl::updated()
{
...
if (!headers.size() && encoded) encoded->populate(headers);
if (encoded && !contentDecoded) {
encoded->getBody(bytes, content); <======= amqp1.0 fails here
contentDecoded = true;
}
encoded.reset();
}
{code}
Running amqp0-10 the call to encoded->getBody() is never executed.
3. The failing code path:
{code}
void DataBuilder::onString(const std::string& value, const std::string&
encoding)
{
switch (nested.top()->getType()) {
case qpid::types::VAR_MAP:
nested.push(&nested.top()->asMap()[value]);
break;
case qpid::types::VAR_LIST:
nested.top()->asList().push_back(qpid::types::Variant(value));
nested.top()->asList().back().setEncoding(encoding);
break;
default:
qpid::types::Variant& v = *(nested.top());
v = value; <======= operator=() called
v.setEncoding(encoding);
nested.pop();
break;
}
}
Variant& Variant::operator=(const std::string& s)
{
if (impl) delete impl; <=======
impl = new VariantImpl(s);
return *this;
}
{code}
>From the stack trace
{noformat}
msvcr100d.dll!operator delete(void * pUserData=0xfeeefeee)
qpidtypesd.dll!std::allocator<char>::deallocate(char * _Ptr=0xfeeefeee,
unsigned int __formal=4277075695)
qpidtypesd.dll!std::basic_string<...>::_Tidy(bool _Built=true, unsigned int
_Newsize=0)
qpidtypesd.dll!std::basic_string<...>::~basic_string<...>()
qpidtypesd.dll!qpid::types::VariantImpl::~VariantImpl() Line 174 + 0x12 bytes
C++
qpidtypesd.dll!qpid::types::VariantImpl::`scalar deleting destructor'() + 0x16
bytes C++
qpidtypesd.dll!qpid::types::Variant::operator=(const std::basic_string<.. > &
s="colours") Line 761
{noformat}
There is a trip through *VariantImpl::`scalar deleting destructor'() *, a
corner of C++ that I don't know very well.
Ideas on how to proceed are welcome.
> [C++ Messaging] Windows AMQP 1.0 map_receiver fails freeing uninitialized
> string Variant
> ----------------------------------------------------------------------------------------
>
> Key: QPID-5663
> URL: https://issues.apache.org/jira/browse/QPID-5663
> Project: Qpid
> Issue Type: Bug
> Components: C++ Client
> Affects Versions: 0.29
> Environment: Windows x86 build on x64 host. Visual Studio 2010
> Reporter: Chuck Rolke
> Attachments: qpid-5663-stack-00.txt
>
>
> Running map_receiver with AMQP 1.0 fails straight away with a free of as
> string at 0xfeeefeee.
> {noformat}
> map_sender localhost:5672 "message_queue; {create: always}"
> "{protocol:amqp1.0}"
> map_receiver localhost:5672 "message_queue; {create: always}"
> "{protocol:amqp1.0}"
> {noformat}
> These work indefinitely running amqp0-10. map_sender is fine running either
> protocol version.
> Stack trace is posted as separate file.
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