PATCH: writejump() self modifying code needs to inform valgrind of change

[Adam Gundy]

Any self modifying code needs to tell valgrind which piece of code has been
modified.

The attached patch makes writejump() in scheduler/sysdeps.c do this.

Currently the code works OK under valgrind, since it is only used for trapping the
__errno_location functions, which haven't yet been called (so they have not been
JITted).


Seeya,
 Adam
--
Real Programmers don't comment their code. If it was hard to write,
it should be hard to read, and even harder to modify.
These are all my own opinions.
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