Re: NULL symbol causes crash
Gary Molloy <g.molloy@...>
Thanks for your email.
I must say, I have not heard of anyone using a NULL symbol to subscribe to the entire topic range for a source. A symbol list subscription would be the method to use for that.
I would be interested to hear if anyone in the community is using this method (NULL symbol to subscribe to an entire source).
But please do submit your patch J
Gary Molloy – SR Labs
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From: openmama-dev-bounces@... [mailto:openmama-dev-bounces@...] On Behalf Of Alpert, Reed
Sent: 25 June 2015 16:01
Subject: [Openmama-dev] NULL symbol causes crash
Running modified mamalistencpp and using a NULL symbol causes a crash.
Granted that NULL symbols are not that easy to use, and there is some argument that says if someone does that it is best to remove their process from the market data ecosystem.
mSource = "IDN_DEV";
Here is the trace, I’ll submit a patch, but wanted to know if there is any usage when a NULL symbol means the source has the entire topic.
#0 0x00007fd30a31357f in __strlen_sse42 () from /lib64/libc.so.6
#1 0x00007fd30afcff6b in copyString (str=0x0) at mama/c_cpp/src/c/subscription.c:2432
#2 0x00007fd30afd1b51 in mamaSubscription_setupBasic (subscription=0x6dc930, transport=0x6b9350, queue=0x6db920, callbacks=0x7fd30af8fa40,
source=0x40bfe2 "IDN_DEV", symbol=0x0, closure=0x6dcc40) at mama/c_cpp/src/c/subscription.c:465
#3 0x00007fd30afd209a in mamaSubscription_setup2 (subscription=0x6dc930, transport=0x6b9350, queue=0x6db920, callbacks=0x7fd30af8fa40,
sourceName=<value optimized out>, symbol=<value optimized out>, closure=0x6dcc40) at mama/c_cpp/src/c/subscription.c:2868
#4 0x00007fd30ad6d340 in Wombat::MamaSubscription::setup (this=0x6dc8d0, transport=0x6bdc50, queue=0x6db8c0, callback=0x6dc8b0, source=0x40bfe2 "IDN_DEV",
symbol=0x0, closure=0x0) at mama/c_cpp/src/cpp/MamaSubscription.cpp:525
#5 0x00007fd30ad6ca2d in Wombat::MamaSubscription::create (this=0x6dc8d0, transport=<value optimized out>, queue=<value optimized out>,
callback=<value optimized out>, source=<value optimized out>, symbol=<value optimized out>, closure=0x0) at mama/c_cpp/src/cpp/MamaSubscription.cpp:443
#6 0x00000000004060e9 in MamaListen::subscribeToSymbol (this=0x7fffafc64740, symbol=0x0) at mamalistencpp.cpp:734
#7 0x0000000000406481 in MamaListen::subscribeToSymbols (this=0x7fffafc64740) at mamalistencpp.cpp:790
#8 0x0000000000408898 in main (argc=11, argv=0x7fffafc649a8) at mamalistencpp.cpp:1627
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