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40 lines
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=====================
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Error Handling Script
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=====================
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LLD provides the ability to hook into some error handling routines through a
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user-provided script specified with ``--error-handling-script=<path to the script>``
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when certain errors are encountered. This document specifies the requirements of
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such a script.
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Generic Requirements
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====================
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The script is expected to be available in the ``PATH`` or to be provided using a
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full path. It must be executable. It is executed in the same environment as the
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parent process.
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Arguments
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=========
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LLD calls the error handling script using the following arguments::
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error-handling-script <tag> <tag-specific-arguments...>
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The following tags are supported:
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- ``missing-lib``: indicates that LLD failed to find a library. The library name
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is specified as the second argument, e.g. ``error-handling-script missing-lib
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mylib``
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- ``undefined-symbol``: indicates that given symbol is marked as undefined. The
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unmangled symbol name is specified as the second argument, e.g.
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``error-handling-script undefined-symbol mysymbol``
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Return Value
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============
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Upon success, the script is expected to return 0. A non-zero value is
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interpreted as an error and reported to the user. In both cases, LLD still
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reports the original error.
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