RE: [Gcl-devel] trying to finalize the windows issues ...

[Mike Thomas]

Hopefully someone can get to this shortly.  I am about a day away from it.

| -----Original Message-----
| From: address@hidden
| [mailto:address@hidden
| Behalf Of Camm Maguire
| Sent: Sunday, 23 May 2004 12:35 AM
| To: address@hidden
| Cc: Mike Thomas; Vadim V. Zhytnikov; Billinghurst,David (CALCRTS)
| Subject: [Gcl-devel] trying to finalize the windows issues ...
|
|
| Greetings!
|
| Could one of you three wonderful souls please try the two suggestions
| below (e.g. 1) patch, 2) more than 65k C stack, -> 8mb) re: the maxima
| ignore-errors issue with --enable-debug and let me know what the
| status is?
|
| Take care,
|
| "Mike Thomas" <address@hidden> writes:
|
| > Hi Camm.
| >
| > | Greetings!  Mike, this sounds quite interesting and promising.
| > |
| > | The BEGIN/END NO_INTERRUPT macros only govern signal handling.  I'm
| > | trying at the moment to reproduce the signal capture in the maxima
| > | build that you must be seeing.  Do you have strace?  If so, can you
| > | post the results of running the maxima build under strace -f?
| > | Alternately,  can you break in main_signal_handler and/or before
| > | interrupt and provide a gdb backtrace?  What we may be seeing is that
| > | the Windows OS is sending signals to the running process that are
| > | simply not being seen on other systems.
| >
| > I should have known better as Windows doesn't do signalling as such -
| > they're faked up in the C runtime for the sake of compatibility
| which makes
| > the whole idea a bit doubtful.  Never-the-less it could have
| been a cause.
| > Further NO_INTERRUPT bracketing led to a regression rather than
| improvement
| > so although it may be that garbage collection interference is
| to blame I was
| > unable to catch a break in main_signal_handler.
| >
| > Can anyone think of another way for GC to occur while copying strings
| > around?
| >
|
| Your problem is symptomatic of some mishandling of gc in the static
| area or C stack.
|
| I note the following in main.c:
|
| #ifdef _WIN32
|           {
|             unsigned int dummy;
|
|             _stackbottom = (unsigned int ) &dummy;
|             _stacktop    = _stackbottom - 0x10000; // ???
|
|           }
| #endif
|
| Is it possible you are underestimating the C stack range, especially
| when the ASCI/PCL multi function/C stack consuming error reporting
| tree is in effect?
|
| Also, please give this a whirl:
|
| Index: gbc.c
| ===================================================================
| RCS file: /cvsroot/gcl/gcl/o/gbc.c,v
| retrieving revision 1.13.4.2.2.10
| diff -u -r1.13.4.2.2.10 gbc.c
| --- gbc.c       7 May 2004 21:43:15 -0000       1.13.4.2.2.10
| +++ gbc.c       18 May 2004 20:22:01 -0000
| @@ -425,7 +426,7 @@
|           mark_contblock(cp, j);
|        } else if (x->a.a_displaced == Cnil) {
|  #ifdef HAVE_ALLOCA
| -       if (cp <= core_end)  /* only if body of array not on C stack */
| +       if (!NULL_OR_ON_C_STACK(cp))  /* only if body of array
| not on C stack */
|  #endif
|           x->a.a_self = (object *)copy_relblock(cp, j);}
|        else if (x->a.a_displaced->c.c_car == Cnil) {
| Index: sgbc.c
| ===================================================================
| RCS file: /cvsroot/gcl/gcl/o/sgbc.c,v
| retrieving revision 1.9.4.1.2.11
| diff -u -r1.9.4.1.2.11 sgbc.c
| --- sgbc.c      7 May 2004 21:43:15 -0000       1.9.4.1.2.11
| +++ sgbc.c      18 May 2004 20:22:01 -0000
| @@ -313,7 +313,7 @@
|         ;
|        else if (x->a.a_displaced == Cnil) {
|  #ifdef HAVE_ALLOCA
| -       if (cp <= core_end)  /* only if body of array not on C stack */
| +       if (!NULL_OR_ON_C_STACK(cp))  /* only if body of array
| not on C stack */
|  #endif
|           x->a.a_self = (object *)copy_relblock(cp, j);
|        }
|
|
| Take care,
|
| > Also improved bcopy() to allow for overlaps but alas no help
| either.  I'm
| > feeling defeated by this at the moment and out of ideas.
| >
| > Cheers
| >
| > Mike Thomas.
| >
| >
| >
| >
| > _______________________________________________
| > Gcl-devel mailing list
| > address@hidden
| > http://mail.gnu.org/mailman/listinfo/gcl-devel
| >
| >
| >
|
| --
| Camm Maguire
| address@hidden
| ==========================================================================
| "The earth is but one country, and mankind its citizens."  --  Baha'u'llah
|
|
|
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