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fix Unsafe for array elements

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This commit is contained in:
Volker Berlin 2023-02-28 20:33:22 +01:00
parent 60d8340760
commit 16d04beeff
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1 changed files with 55 additions and 21 deletions
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76
src/de/inetsoftware/jwebassembly/module/UnsafeManager.java
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@ -513,7 +513,7 @@ class UnsafeManager {
}
WatCodeSyntheticFunctionName func =
new WatCodeSyntheticFunctionName( fieldNameWithOffset.className, '.' + name.methodName, name.signature, "", (AnyType[])null ) {
new WatCodeSyntheticFunctionName( fieldNameWithOffset.className, '.' + fieldNameWithOffset.methodName + '.' + name.methodName, name.signature, "", (AnyType[])null ) {
@Override
protected String getCode() {
UnsafeState state = null;
@ -525,7 +525,7 @@ class UnsafeManager {
}
if( state == null ) {
if( functions.isFinish() ) {
throw new RuntimeException( name.signatureName );
throw new RuntimeException( this.fullName + name.signature );
}
// we are in the scan phase. The static code was not scanned yet.
return "";
@ -540,20 +540,42 @@ class UnsafeManager {
if( type.isRefType() ) {
type = ValueType.ref;
}
int paramOffset = "java/util/concurrent/atomic/AtomicReferenceFieldUpdater".equals( name.className ) ? -1 : 0;
return "local.get 1" // THIS
+ " struct.get " + state.typeName + ' ' + state.fieldName //
+ " local.get " + (3 + paramOffset) // expected
+ " " + type + ".eq" //
+ " if" //
+ " local.get 1" // THIS
+ " local.get " + (4 + paramOffset) // update
+ " struct.set " + state.typeName + ' ' + state.fieldName //
+ " i32.const 1" //
+ " return" //
+ " end" //
+ " i32.const 1" //
+ " return";
if( state.fieldName != null ) {
// field access
int paramOffset = "java/util/concurrent/atomic/AtomicReferenceFieldUpdater".equals( name.className ) ? -1 : 0;
return "local.get 1" // THIS
+ " struct.get " + state.typeName + ' ' + state.fieldName //
+ " local.get " + (3 + paramOffset) // expected
+ " " + type + ".eq" //
+ " if" //
+ " local.get 1" // THIS
+ " local.get " + (4 + paramOffset) // update
+ " struct.set " + state.typeName + ' ' + state.fieldName //
+ " i32.const 1" //
+ " return" //
+ " end" //
+ " i32.const 1" //
+ " return";
} else {
// array access
return "local.get 1" // THIS
+ " local.get 2" // the array index
+ " i32.wrap_i64" // long -> int
+ " array.get " + state.typeName //
+ " local.get 3 " // expected
+ " " + type + ".eq" //
+ " if" //
+ " local.get 1" // THIS
+ " local.get 2" // the array index
+ " i32.wrap_i64" // long -> int
+ " local.get 4 " // update
+ " array.set " + state.typeName //
+ " i32.const 1" //
+ " return" //
+ " end" //
+ " i32.const 1" //
+ " return";
}
case "getAndAddInt":
case "getAndAddLong":
@ -584,9 +606,19 @@ class UnsafeManager {
case "putOrderedObject":
case "putObjectVolatile":
case "putObject":
return "local.get 1" // THIS
+ " local.get 3" // x
+ " struct.set " + state.typeName + ' ' + state.fieldName;
if( state.fieldName != null ) {
// field access
return "local.get 1" // THIS
+ " local.get 3" // x
+ " struct.set " + state.typeName + ' ' + state.fieldName;
} else {
// array access
return "local.get 1" // THIS
+ " local.get 2" // the array index
+ " i32.wrap_i64" // long -> int
+ " local.get 3" // x
+ " array.set " + state.typeName;
}
case "getInt":
case "getLong":
@ -597,6 +629,7 @@ class UnsafeManager {
case "getObjectVolatile":
return "local.get 1" // array
+ " local.get 2" // the array index
+ " i32.wrap_i64" // long -> int
+ " array.get " + state.typeName
+ " return";
}
@ -604,8 +637,9 @@ class UnsafeManager {
throw new RuntimeException( name.signatureName );
}
};
functions.markAsNeeded( func, true ); // original function has an THIS parameter of the Unsafe instance, we need to consume it
WasmCallInstruction call = new WasmCallInstruction( func, callInst.getCodePosition(), callInst.getLineNumber(), callInst.getTypeManager(), false );
boolean needThisParameter = true;
functions.markAsNeeded( func, needThisParameter ); // original function has an THIS parameter of the Unsafe instance, we need to consume it
WasmCallInstruction call = new WasmCallInstruction( func, callInst.getCodePosition(), callInst.getLineNumber(), callInst.getTypeManager(), needThisParameter );
instructions.set( idx, call );
// a virtual method call has also a DUP of this because we need for virtual method dispatch the parameter 2 times.