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use "java/lang/Object" as fallback type for NULL values

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Volker Berlin 2022-05-08 18:53:45 +02:00
parent 23199840c8
commit 52dd9a1665
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1 changed files with 21 additions and 14 deletions
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35
src/de/inetsoftware/jwebassembly/module/JavaMethodWasmCodeBuilder.java
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@ -967,23 +967,30 @@ class JavaMethodWasmCodeBuilder extends WasmCodeBuilder {
int size = instructions.size();
for( int i = 0; i < size; i++ ) {
WasmInstruction instr = instructions.get( i );
if( instr.getType() == Type.Struct ) {
WasmStructInstruction structInst = (WasmStructInstruction)instr;
if( structInst.getOperator() == StructOperator.NULL ) {
int count = 0;
for( int s = i + 1; s < size; s++ ) {
WasmInstruction nextInstr = instructions.get( s );
count -= nextInstr.getPopCount();
if( count < 0 ) {
AnyType[] popValueTypes = nextInstr.getPopValueTypes();
structInst.setStructType( (StructType)popValueTypes[-1 - count] );
break;
}
if( nextInstr.getPushValueType() != null ) {
count++;
try {
if( instr.getType() == Type.Struct ) {
WasmStructInstruction structInst = (WasmStructInstruction)instr;
if( structInst.getOperator() == StructOperator.NULL ) {
int count = 0;
for( int s = i + 1; s < size; s++ ) {
WasmInstruction nextInstr = instructions.get( s );
count -= nextInstr.getPopCount();
if( count < 0 ) {
AnyType[] popValueTypes = nextInstr.getPopValueTypes();
AnyType type = popValueTypes[-1 - count];
// is the fallback to java/lang/Object right? There can also be a NULL value for external.
StructType structType = type instanceof StructType ? (StructType)type : getTypeManager().valueOf( "java/lang/Object" );
structInst.setStructType( structType );
break;
}
if( nextInstr.getPushValueType() != null ) {
count++;
}
}
}
}
} catch( Exception ex ) {
throw WasmException.create( ex, instr.getLineNumber() );
}
}
}