[LLVMdev] Catching exceptions passed through a JIT ExecutionEngine

Peter Zion peter.zion at fabric-engine.com
Tue Jul 12 16:25:16 PDT 2011

Hi All,

I'm trying to catch an exception that is "passed through" an LLVM ExecutionEngine but I am unable to do so.  Specifically, in C++ code, inside a try/catch block, I call a JITted function, which in turn calls back into my code.  Everything works fine unless an exception is thrown; I would except the outermost try/catch(...) block to catch the exception thrown in my innermost C++ code, but instead I get the abort "terminate called after throwing an instance of 'MyException'".  I am compiling the system with g++ (on Linux and OSX); I haven't tried MSVC++.

Is there something that I need to do to get this behaviour to work?  I admit that I have only a fairly basic understanding of how exception handling is implemented in C++ but from what I've read it seems like the exception should unwind through what is, for all intents and purposes, a simple call stack...

Peter Zion

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