53 lines
2.4 KiB
Python
53 lines
2.4 KiB
Python
# GDB pretty-printer for ExprNode class hierarchy
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# Copyright © 2022-2023 Dynare Team
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#
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# This file is part of Dynare.
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#
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# Dynare is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Dynare is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Dynare. If not, see <https://www.gnu.org/licenses/>.
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class ExprNodePrinter:
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'''Pretty-prints an ExprNode value'''
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def __init__(self, val):
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self.val = val
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def to_string(self):
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# Call the toString() method on the pointer.
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# We must use the raw pretty-printer for the pointer itself, otherwise
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# we enter an infinite loop.
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# We retrieve a C string, because with C++ strings the gdb pretty-printer
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# insists on keeping the quotes around it.
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r = gdb.parse_and_eval("((ExprNode *) " + self.val.format_string(raw = True) + ")->toString().c_str()")
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typestr = "(" + str(self.val.type) + ") ";
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# Add dynamic type information between brackets, if different from static type
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if str(self.val.type) != str(self.val.dynamic_type):
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typestr += "[" + str(self.val.dynamic_type) + "] "
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return typestr + r.string()
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class ExprNodePrinterControl(gdb.printing.PrettyPrinter):
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'''Determines whether a value can be pretty printed with ExprNodePrinter. To be directly registered within the GDB API.'''
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def __init__(self):
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# The name below will appear in “info pretty-printer”, and can be used with “enable/disable pretty-printer”
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super().__init__('ExprNode')
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def __call__(self, val):
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# Check if the value is a subtype of ExprNode *.
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# Doing a dynamic_cast on a non-pointer type triggers an exception, so we first check
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# whether it’s a pointer (after resolving for typedefs, such as “expr_t”).
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if val.type.strip_typedefs().code == gdb.TYPE_CODE_PTR and val.dynamic_cast(gdb.lookup_type('ExprNode').pointer()) != 0:
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return ExprNodePrinter(val)
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# Register the pretty printer
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gdb.pretty_printers.append(ExprNodePrinterControl())
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