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Tensor view keeps original tensor alive. #15057

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Merged
merged 1 commit into from
Oct 13, 2025
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Merged

Tensor view keeps original tensor alive. #15057

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6 changes: 5 additions & 1 deletion extension/apple/ExecuTorch/Exported/ExecuTorchTensor.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -131,7 +131,11 @@ - (instancetype)initWithTensor:(ExecuTorchTensor *)otherTensor {
auto tensor = make_tensor_ptr(
*reinterpret_cast<TensorPtr *>(otherTensor.nativeInstance)
);
return [self initWithNativeInstance:&tensor];
self = [self initWithNativeInstance:&tensor];
if (self) {
_data = otherTensor->_data;
}
return self;
}

- (instancetype)copy {
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13 changes: 13 additions & 0 deletions extension/apple/ExecuTorch/__tests__/TensorTest.swift
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Expand Up @@ -96,6 +96,19 @@ class TensorTest: XCTestCase {
XCTAssertEqual(tensor.scalars(), dataArray)
}

func testInitDataViewSurvivesSourceScopeEnd() {
let dataArray: [Float] = [1.0, 2.0, 3.0, 4.0]
var view: Tensor<Float>!
autoreleasepool {
let data = Data(bytes: dataArray, count: dataArray.count * MemoryLayout<Float>.size)
let tensor = Tensor<Float>(data: data, shape: [4])
view = Tensor<Float>(tensor)
XCTAssertEqual(view.scalars(), dataArray)
}
XCTAssertEqual(view.count, 4)
XCTAssertEqual(view.scalars(), dataArray)
}

func testWithCustomStridesAndDimensionOrder() {
let data: [Float] = [1.0, 2.0, 3.0, 4.0]
let tensor = Tensor<Float>(
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