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Fallback on variable slot calculation

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Volker Berlin 2021-11-06 16:59:30 +01:00
parent 15031b3822
commit 9b324fdacb
1 changed files with 21 additions and 0 deletions
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21
src/de/inetsoftware/jwebassembly/module/LocaleVariableManager.java
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@ -384,6 +384,27 @@ class LocaleVariableManager {
} }
} }
// there is no variable slot declared for the given java code position
// in a second try we search for a slot that has the smallest distance
// TODO a better option can be to use the next slot and not the smallest distance because the position is define some time on first use and not on assign
int index = -1;
int distance = Integer.MAX_VALUE;
for( int i = 0; i < size; i++ ) {
Variable var = variables[i];
if( slot != var.idx ) {
continue;
}
int distanceDiff = Math.min( Math.abs( javaCodePos - var.startPos), Math.abs( javaCodePos - var.endPos ) );
if( distanceDiff <= distance ) {
index = i;
distance = distanceDiff;
}
}
if( index >= 0 ) {
return index;
}
throw new WasmException( "Can not find local variable for slot: " + slot + " on code position " + javaCodePos, -1 ); throw new WasmException( "Can not find local variable for slot: " + slot + " on code position " + javaCodePos, -1 );
} }