Re: [Dotgnu-libjit] How Do I Debug a Memory Protection Error?

[Klaus Treichel]

Hi Noah,

> Hello,
> 
> I have found the following test case, which is a 63-line program which
> gives a bus error on my machine.
> 
> As expected, GDB shows a kernel protection failure at address
> 0x00000001001004e0, which also happens to be the value of the
> "function" variable, and in register 11.
> 
> Here is the test program.
> 
[snip]
>   {
>     enum jit_return_t retval;
>     int argvals[] = {3, 4, 5};
>     void *args[] = {&(argvals[0]), &(argvals[1]), &(argvals[2])};
> 
>     jit_apply(signature, function, args, 3, &retval);

Use jit_function_apply(function, args, &retval);
 or jit_function_apply_vararg(function, signature, args, &retval);
instead.

The function jit_apply doesn't take the function but the function's
entrypoint as argument 2.

Cheers,
Klaus

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