[Webkit-unassigned] [Bug 209266] New: [JSC] StructureStubInfo::bufferedStructures should not ref/deref UniquedStringImpl

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Mar 18 19:22:15 PDT 2020


            Bug ID: 209266
           Summary: [JSC] StructureStubInfo::bufferedStructures should not
                    ref/deref UniquedStringImpl
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ysuzuki at apple.com

This data structure can be destroyed in CodeBlock::finalizeUnconditionally. So it should not include Strings.

1. Can we just set AtomStringTable when executing CodeBlock::finalizeUnconditionally?

This does not work correctly. Our Web Worker implementation is releasing heapAccess() when finishing code execution and waiting for runloop message.
This means that CodeBlock::finalizeUnconditionally can potentially work concurrently to Web Worker's main thread.

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