I have been seeing an intermittent heap corruption in my AMQ-cpp program,
on and of, for some time now. It happens right at the start when it calls
activemq::library::ActiveMQCPP::initializeLibrary(). Unfortunately, that
which was intermittent is now happening every time.
I am using AMQ-cpp 3.1.0 in Windows-XP SP3, with VS 2005 (aka vc8).
By moving this call to at the very start of main, the bug relocates -- it
then fails on this line of code:
std::auto_ptr<activemq::core::ActiveMQConnectionFactory>
connectionFactory(
new activemq::core::ActiveMQConnectionFactory(queueManagerName));
The variable 'queueManagerName' is initialised correctly, it is set
to"tcp://127.0.0.1:61616".
Output from VS is not very helpful:
First-chance exception at 0x7c919084 in myprog.exe: 0xC0000005: Access
violation reading location 0x0000000f.
First-chance exception at 0x7c812afb in myprog.exe: Microsoft C++
exception: std::bad_alloc at memory location 0x0012ee7c..
HEAP[myprog.exe]: Heap block at 0541A820 modified at 0541A864 past
requested size of 3c
I have tried using DUMA, a memory debugger, to shed any light but
unfortunately, it yields nothing. Sadly, I do not have access to purify.
Also the code is non-portable (don't ask) so I can't build it on linux and
use valgrind.
The call stack looks like this:
ntdll.dll!7c90120e()
[Frames below may be incorrect and/or missing, no symbols loaded
for ntdll.dll]
ntdll.dll!7c96e139()
ntdll.dll!7c95f38c()
ntdll.dll!7c96e507()
ntdll.dll!7c9622e8()
ntdll.dll!7c90327a()
kernel32.dll!7c85f9a7()
> msvcr80d.dll!_CrtIsValidHeapPointer(const void *
pUserData=0x0541a848) Line 2072 C++
msvcr80d.dll!_free_dbg_nolock(void * pUserData=0x0541a848, int
nBlockUse=1) Line 1279 + 0x9 bytes C++
msvcr80d.dll!_free_dbg(void * pUserData=0x0541a848, int
nBlockUse=1) Line 1220 + 0xd bytes C++
msvcr80d.dll!operator delete(void * pUserData=0x0541a848) Line 54
+ 0x10 bytes C++
myprog.exe!xms::ConnectionFactory::setProperty() + 0x78e bytes
C++
myprog.exe!main(int argc=11, char * * argv=0x054172b0) Line 457 +
0x10 bytes C++
myprog.exe!__tmainCRTStartup() Line 597 + 0x19 bytes C
myprog.exe!mainCRTStartup() Line 414 C
kernel32.dll!7c817077()
This is weird because I do not call ConnectionFactory::setProperty(), and
the only call I make to AMQ-cpp from main is the init call.
The problem does not occur in Release mode. Unfortunately I need Debug
mode (for various reasons).
Recently a bug was reported in AMQ-cpp to do with deadlocks that bites
Windows users. I am on the version that has that bug but I do not think
that bug is responsible for this.
I am desperately in need of some help/guidance please.
Regards,
Andrew Marlow
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