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`fs.openAsBlob()` does not work properly for files > 2GB

nodejs/node#52585·122028·JavaScript·55 天未动·12 条评论·上游最近活跃 ·池内状态:可认领
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上游 issue 正文

### Version v21.7.3 (and v20.12.2) ### Platform Darwin bender.local 23.4.0 Darwin Kernel Version 23.4.0: Fri Mar 15 00:10:42 PDT 2024; root:xnu-10063.101.17~1/RELEASE_ARM64_T6000 arm64 ### Subsystem fs ### What steps will reproduce the bug? Steps to reproduce bug: 1. Generate a 3 GB file with `dd if=/dev/random of=random.bin bs=1048576 count=3072` 2. Launch node (v21.7.3 and v20.12.2 both repro for me) 3. `const b = await fs.openAsBlob("random.bin")` 4. `b.slice(2**31-2, 2**31-1)` <-- works 5. `b.slice(2**31-1, 2**31)` <-- returns a slice of zero length 6. `b.slice(2**31, 2**31+1)` <-- crashes Full textual output of doing this given below. Also, for files greater than 4GB, the size of the blob is wrong. It appears to be exactly `4*(2**30)` less than the actual size. For example, for a `5*(2**30)` byte file, the blob size is reported as `1073741824`, which is `(2**30)`. And, for a file that is exactly `4*(2**30)`, it reports a size of zero. ### How often does it reproduce? Is there a required condition? Always reproduces. ### What is the expected behavior? Why is that the expected behavior? Can operate on the Blob normally. ### What do you see instead? Described above. See output below. ### Additional information ```console $ dd if=/dev/random of=random.bin bs=1048576 count=3072 3072+0 records in 3072+0 records out 3221225472 bytes transferred in 4.213743 secs (764457033 bytes/sec) $ ls -l random.bin -rw-r--r-- 1 jbrandt staff 3221225472 Apr 18 15:04 random.bin $ node -v v21.7.3 $ node Welcome to Node.js v21.7.3. Type ".help" for more information. > const b = await fs.openAsBlob("random.bin") undefined > b Blob { size: 3221225472, type: '' } > b.slice(2**31-2, 2**31-1) Blob { size: 1, type: '' } > b.slice(2**31-1, 2**31) Blob { size: 0, type: '' } > b.slice(2**31, 2**31+1) # node[96070]: static void node::Blob::ToSlice(const FunctionCallbackInfo<v8::Value> &) at ../src/node_blob.cc:247 # Assertion failed: args[0]->IsUint32() ----- Native stack trace ----- 1…
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