[Webkit-unassigned] [Bug 242417] New: Insert break instructions in the LLInt asm to ensure that global labels are not aliased.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=242417

            Bug ID: 242417
           Summary: Insert break instructions in the LLInt asm to ensure
                    that global labels are not aliased.
           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

This is needed because the linker may not handle aliased global labels (multiple global labels pointing to the same location) well.

To achieve this, we also remove the hacks in offlineasm's enterAsm and leaveAsm functions that use to add the _llintPCRangeStart and _llintPCRangeEnd labels.  Instead, we'll add them explicitly in LowLevelInterpreter.asm.  This allows us to easily append a break instruction after _llintPCRangeEnd.

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