Hi,

I've instrumented parts of the v8 source code to call a function from an 
external library, and have been able to get it compiled successfully, but 
am running into issues at runtime. Specifically, I am running v8 inside an 
arm simulator, and the instrumentation calls I added are recognized by the 
arm simulator (i extend ununsed opcode for functionality). However, at 
runtime I get the v8 error printed to my simulated terminal.

/tmp/script: line 13:  3207 Illegal instruction     
/system/v8/arm.release/shell run-deltablue.js


I suspect that because the instrumented call is getting compiled down to 
the unused opcode, v8 doesn't recognize it and traps. I've grepped through 
the source code, but couldn't find where it traps based on an illegal 
instruction. When encountering this specific opcode of my instrumented 
calls, I want to simply return and not exit out of the run.


Thanks,

Malek

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