Function evaluateExpressionValue

fbchisellldbbase.py:65–107

(
    expression,
    printErrors=True,
    language=lldb.eLanguageTypeObjC_plus_plus,
    tryAllThreads=False,
)

# evaluates expression in Objective-C++ context, so it will work even for
# Swift projects
def evaluateExpressionValue(
    expression,
    printErrors=True,
    language=lldb.eLanguageTypeObjC_plus_plus,
    tryAllThreads=False,
):
    frame = (
        lldb.debugger.GetSelectedTarget()
        .GetProcess()
        .GetSelectedThread()
        .GetSelectedFrame()
    )
    options = lldb.SBExpressionOptions()
    options.SetLanguage(language)

    # Allow evaluation that contains a @throw/@catch.
    #   By default, ObjC @throw will cause evaluation to be aborted. At the time
    #   of a @throw, it's not known if the exception will be handled by a @catch.
    #   An exception that's caught, should not cause evaluation to fail.
    options.SetTrapExceptions(False)

    # Give evaluation more time.
    options.SetTimeoutInMicroSeconds(5000000)  # 5s

    # Most Chisel commands are not multithreaded.
    options.SetTryAllThreads(tryAllThreads)

    value = frame.EvaluateExpression(expression, options)
    error = value.GetError()

    # Retry if the error could be resolved by first importing UIKit.
    if (
        error.type == lldb.eErrorTypeExpression
        and error.value == lldb.eExpressionParseError
        and importModule(frame, "UIKit")
    ):
        value = frame.EvaluateExpression(expression, options)
        error = value.GetError()

    if printErrors and not isSuccess(error):
        print(error)

    return value


def evaluateInputExpression(expression, printErrors=True):