Imperial-MEng/WACC_37
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix: implements null pointer checks

Browse Source
This commit is contained in:
Jonny
2025-02-27 23:57:42 +00:00
parent 1b2df507ba
commit edcac2782b
3 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/main/wacc/backend/asmGenerator.scala
View File

@@ -196,6 +196,8 @@ object asmGenerator {
chain ++= evalExprOntoStack(x)
chain += stack.pop(RAX)
chain += stack.pop(RCX)
chain += Compare(EAX, ImmediateVal(0))
chain += Jump(LabelArg(NullPtrError.errLabel), Cond.Equal)
chain += Compare(MemLocation(RAX, D32), ECX)
chain += Jump(LabelArg(OutOfBoundsError.errLabel), Cond.LessEqual)
chain += stack.pop(RDX)
@@ -302,6 +304,8 @@ object asmGenerator {
chain += Compare(RCX, ImmediateVal(0))
chain += Jump(LabelArg(OutOfBoundsError.errLabel), Cond.Less)
chain += stack.pop(RAX)
chain += Compare(EAX, ImmediateVal(0))
chain += Jump(LabelArg(NullPtrError.errLabel), Cond.Equal)
chain += Compare(MemLocation(RAX, D32), ECX)
chain += Jump(LabelArg(OutOfBoundsError.errLabel), Cond.LessEqual)
// + Int because we store the length of the array at the start