[cfe-dev] JIT crashing when compiling source code with Clang and -mretpoline flag

[Gaier, Bjoern via cfe-dev]

No experiences, opinions or thoughts on this? :c


From: cfe-dev <cfe-dev-bounces at lists.llvm.org> On Behalf Of Gaier, Bjoern via cfe-dev
Sent: Freitag, 28. Juni 2019 07:52
To: llvm-dev <llvm-dev at lists.llvm.org>; cfe-dev at lists.llvm.org
Subject: [cfe-dev] JIT crashing when compiling source code with Clang and -mretpoline flag

Heyho both Mailinglists,

I'm not sure if I encountered a bug or if I'm doing something wrong. I compiled a "Hello World"-function with Clang to LLVM-IR code, while passing the "-mretpoline" flag.

I tried jitting and calling that function with the KaleidoscopeJIT code, but when calling "lookup" for that function the application crashed.
I also tried that file in an old MCJIT implementation I had - there the application crashed when calling the function (but it does find the address for the function first).

If I recompile my code without the "-mretpoline" flag, everything works fine again.
I compiled Clang and the LLVM files from the LLVM8 source files, I run them under Windows7 64bit. Any ideas what might went wrong?

Kind greetings
Björn

Als GmbH eingetragen im Handelsregister Bad Homburg v.d.H. HRB 9816, USt.ID-Nr. DE 114 165 789 Geschäftsführer: Dr. Hiroshi Nakamura, Dr. Robert Plank, Markus Bode, Heiko Lampert, Takashi Nagano, Takeshi Fukushima. Junichi Tajika
Als GmbH eingetragen im Handelsregister Bad Homburg v.d.H. HRB 9816, USt.ID-Nr. DE 114 165 789 Geschäftsführer: Dr. Hiroshi Nakamura, Dr. Robert Plank, Markus Bode, Heiko Lampert, Takashi Nagano, Takeshi Fukushima. Junichi Tajika
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