[Webkit-unassigned] [Bug 275980] New: Negative length exception for TypedArray constructor is not thrown in JIT compiler

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Jun 27 19:53:44 PDT 2024


https://bugs.webkit.org/show_bug.cgi?id=275980

            Bug ID: 275980
           Summary: Negative length exception for TypedArray constructor
                    is not thrown in JIT compiler
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: q602706150 at gmail.com

The following script should print `pass`.
```
function opt(a) {
  new Uint8Array(a);
}

for(let i=0;i<1000000;i++){
  opt(50)
}

try{
  opt(-50)
  print("not pass")
}catch(e){
  print(e)
  print("pass")
}
```

Actual output:
```
not pass
```

Expected output:
```
RangeError: length cannot be negative
pass
```

run args:
cmake-build-debug/bin/jsc --useConcurrentJIT=0 ./test.js

tested on jsc commit id:
47fe298829ac629f561518641b7e6bc4069cb09b

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