http://d.puremagic.com/issues/show_bug.cgi?id=4199

           Summary: D2 core.sys.posix.setjmp segfaults
           Product: D
           Version: 2.041
          Platform: Other
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: druntime
        AssignedTo: sean@invisibleduck.org
        ReportedBy: rsinfu@gmail.com


--- Comment #0 from Shin Fujishiro <rsinfu@gmail.com> 2010-05-17 00:41:40 PDT ---
This program core dumps on FreeBSD (and it should on Linux):
--------------------
import core.sys.posix.setjmp;

void main()
{
    jmp_buf st = void;

    setjmp(st);
    assert(0); // trap; not reached due to the bug
}
--------------------

The C standard defines jmp_buf as an array.  In C and D1, the definition works since arrays (static arrays) are passed to functions by reference.  But in D2, static arrays are passed by value!  Hence the above program core dumps.

So, setjmp() and longjmp() must be declared as:
--------------------
int  setjmp(ref jmp_buf);
void longjmp(ref jmp_buf, int);
--------------------

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Shin Fujishiro <rsinfu@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Platform|Other                       |All
            Summary|D2 core.sys.posix.setjmp    |D2 core.sys.posix.*: array
                   |segfaults                   |parameters of C functions
                   |                            |must be ref
         OS/Version|FreeBSD                     |All


--- Comment #1 from Shin Fujishiro <rsinfu@gmail.com> 2010-05-17 06:17:01 PDT ---
Hmm, the problem seems more generic.  More functions in core.sys.posix.* take array parameters, and these are not ref-ed.  A good example is pipe():
--------------------
import std.stdio;
import core.sys.posix.unistd; // int pipe(int[2]);
void main() {
    int[2] pp;
    pipe(pp);
    writeln("Hello, world."); // not reached!
}
--------------------

The pipe() must be declared like: int pipe(ref int[2]).

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Steven Schveighoffer <schveiguy@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |schveiguy@yahoo.com
         Resolution|                            |DUPLICATE


--- Comment #2 from Steven Schveighoffer <schveiguy@yahoo.com> 2010-05-17 06:34:35 PDT ---
*** This issue has been marked as a duplicate of issue 3604 ***

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