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adapted to new semantics of the EHEAP error: no longer fatal

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ceriel 1988-04-11 10:29:59 +00:00
parent b190c55526
commit b2275303a2
4 changed files with 7 additions and 5 deletions
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4
doc/em/dspace.nr
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@ -357,9 +357,9 @@ If it is smaller, then the heap shrinks.
HP may never point below its original value. HP may never point below its original value.
All words between the current HP and the original HP All words between the current HP and the original HP
are allocated to the heap. are allocated to the heap.
The heap may not grow into a part of memory that is already allocated The heap may not grow into a part of memory that is already allocated.
for the stack.
When this is attempted, the STR instruction will cause a trap to occur. When this is attempted, the STR instruction will cause a trap to occur.
In this case, HP retains its old value.
.P .P
The only way to address the heap is indirectly. The only way to address the heap is indirectly.
Whenever an object is allocated by increasing HP, Whenever an object is allocated by increasing HP,

3
doc/em/em.i
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@ -205,7 +205,8 @@ begin if (a<sp) or (a mod wsize<>0) then trap(ESTACK); lb:=a end;
procedure newhp(a:adr); procedure newhp(a:adr);
begin if (a>sp) or (a>maxdata+1) or (a mod wsize<>0) begin if (a>sp) or (a>maxdata+1) or (a mod wsize<>0)
then trap(EHEAP); hp:=a then trap(EHEAP)
else hp:=a
end; end;
function argc(a:double):sword; function argc(a:double):sword;

3
doc/em/int/em.p
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@ -245,7 +245,8 @@ begin if (a<sp) or (a mod wsize<>0) then trap(ESTACK); lb:=a end;
procedure newhp(a:adr); procedure newhp(a:adr);
begin if (a>sp) or (a>maxdata+1) or (a mod wsize<>0) begin if (a>sp) or (a>maxdata+1) or (a mod wsize<>0)
then trap(EHEAP); hp:=a then trap(EHEAP)
else hp:=a
end; end;
function argc(a:double):sword; function argc(a:double):sword;

2
doc/em/traps.nr
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@ -96,7 +96,7 @@ n l l.
9@EFUND@Undefined float 9@EFUND@Undefined float
10@ECONV@Conversion error 10@ECONV@Conversion error
16*@ESTACK@Stack overflow 16*@ESTACK@Stack overflow
17*@EHEAP@Heap overflow 17@EHEAP@Heap overflow
18*@EILLINS@Illegal instruction 18*@EILLINS@Illegal instruction
19*@EODDZ@Illegal size argument 19*@EODDZ@Illegal size argument
20*@ECASE@Case error 20*@ECASE@Case error