Eliot Moss moss@cs.umass.edu
Wed Jul 22 15:33:00 GMT 2015

On 7/22/2015 11:14 AM, Corinna Vinschen wrote:

>    NEW:  sigsetjmp and siglongjmp were only implemented as macros so far.
>    POSIX requires functions longjmp and siglongjmp to exist.  2.2.0-0.2
>    adds sigsetjmp and siglongjmp functions.
>    2.2.0 comes with four new functions:  getcontext, setcontext,
>    makecontext and swapcontext.

So I am wondering if signal handlers now have access to the full context,
including register values.  There was at one time a desire to port Jikes RVM,
a research Java Virtual Machine, to cygwin, to get it running under Windows.
Lack of ability to obtain and modify the ucontext in a signal handler was
the sticking point.  (It was needed in the case of, say, a null pointer
exception, to fake up the throwing of the Java exception when the signal
handler returns.)

Regards -- Eliot Moss

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