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Won't Fix

Won't Fix in 5.4.X, 5.5.X, 5.6.X

Votes

0

Found in

5.3.4p4

Issue ID

800658

Regression

No

Loading specific memory snapshot causes an exception in the memory profiler

Mono

-

Reproduction steps:
1. Download attached "MemorySnapshot3.memsnap" memory snapshot.
2. Download and Open attached "memoryprofiler" project.
3. Go to "Window > MemoryProfiler".
4. Click "Load Snapshot".
5. Select "MemorySnapshot3.memsnap" memory snapshot.
6. Wait for 5-15 minutes.
7. Notice the error in the console window:

ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: startIndex
System.BitConverter.PutBytes (System.Byte* dst, System.Byte[] src, Int32 start_index, Int32 count) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/BitConverter.cs:176)

  1. Resolution Note:

    This case is no longer relevant as it targets the bit-bucket memory profiler which is unsupported. A new memory profiler was introduced in 2018.3.

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Comments (2)

  1. Sprarage

    Dec 03, 2019 16:40

    If bitbucket profiler is no longer supported by 2018.3 then at least this 2019.2 page needs update:
    https://docs.unity3d.com/2019.2/Documentation/Manual/BestPracticeUnderstandingPerformanceInUnity2.html

  2. sirchb

    Aug 12, 2016 23:49

    I got this error while taking a memory snapshot of my game (not loading from a previously saved file). I managed to get my snapshot to technically work by changing this line:

    for (int i = 0; i != arrayLength; i++)

    To this:

    for (int i = 0; i != arrayLength && cursor.offset < cursor.bytes.Length; i++)

    in Crawler.cs

    This stops the BytesAndOffset object from reading past the end of its byte array, which was happening when BytesAndOffset.pointerSize was 4.

    Not sure if this actually solves the root problem but it let me see the snapshot and nothing noticeable was wrong with it.

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