[Webkit-unassigned] [Bug 237441] New: Fix broken SuspendExceptionScope and remove redundant VM::DeferExceptionScope.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=237441

            Bug ID: 237441
           Summary: Fix broken SuspendExceptionScope and remove redundant
                    VM::DeferExceptionScope.
           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: mark.lam at apple.com

SuspendExceptionScope was meant to do exactly the same things that VM::DeferExceptionScope does, except that SuspendExceptionScope hasn't been updated to handle exception handling via VMtraps bits.  This patch will fix SuspendExceptionScope to work like VM::DeferExceptionScope, and remove the now redundant VM::DeferExceptionScope.  SuspendExceptionScope is the better name here because the scope actually suspends any pending exception.  This is different from other Defer scopes where we prevent some new event from arising and defer the event to a later time.

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