[Webkit-unassigned] [Bug 199399] New: [JSC][Win] Support unwind information for LLInt ASM by using MASM directives to get callstack in debugger

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=199399

            Bug ID: 199399
           Summary: [JSC][Win] Support unwind information for LLInt ASM by
                    using MASM directives to get callstack in debugger
           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: Hironori.Fujii at sony.com

[JSC][Win] Support unwind information for LLInt ASM by using MASM directives to get callstack in debugger

MASM has directives for debug information.

.SETFRAME | Microsoft Docs
https://docs.microsoft.com/ja-jp/cpp/assembler/masm/dot-setframe?view=vs-2019

VS debugger can't get callstack under JSC. It looks like the following:

> WebKit.dll!WebCore::Node::appendChild(WebCore::Node & newChild) Line 493	C++
> WebKit.dll!WebCore::jsNodePrototypeFunctionAppendChildBody(JSC::ExecState * state, WebCore::JSNode * castedThis, JSC::ThrowScope & throwScope) Line 860	C++
> WebKit.dll!WebCore::IDLOperation<WebCore::JSNode>::call<&WebCore::jsNodePrototypeFunctionAppendChildBody,WebCore::CastedThisErrorBehavior::Throw>(JSC::ExecState & state, const char * operationName) Line 53	C++
> WebKit.dll!WebCore::jsNodePrototypeFunctionAppendChild(JSC::ExecState * state) Line 866	C++
> [External Code]

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