80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/* Call stacks at program points.
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Copyright (C) 2019-2021 Free Software Foundation, Inc.
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Contributed by David Malcolm <dmalcolm@redhat.com>.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_ANALYZER_CALL_STRING_H
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#define GCC_ANALYZER_CALL_STRING_H
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namespace ana {
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class supergraph;
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class call_superedge;
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class return_superedge;
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/* A string of return_superedge pointers, representing a call stack
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at a program point.
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This is used to ensure that we generate interprocedurally valid paths
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i.e. that we return to the same callsite that called us.
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The class actually stores the return edges, rather than the call edges,
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since that's what we need to compare against. */
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class call_string
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{
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public:
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call_string () : m_return_edges () {}
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call_string (const call_string &other);
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call_string& operator= (const call_string &other);
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bool operator== (const call_string &other) const;
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void print (pretty_printer *pp) const;
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json::value *to_json () const;
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hashval_t hash () const;
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bool empty_p () const { return m_return_edges.is_empty (); }
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void push_call (const supergraph &sg,
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const call_superedge *sedge);
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const return_superedge *pop () { return m_return_edges.pop (); }
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int calc_recursion_depth () const;
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static int cmp (const call_string &a,
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const call_string &b);
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unsigned length () const { return m_return_edges.length (); }
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const return_superedge *operator[] (unsigned idx) const
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{
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return m_return_edges[idx];
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}
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void validate () const;
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private:
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auto_vec<const return_superedge *> m_return_edges;
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};
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} // namespace ana
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#endif /* GCC_ANALYZER_CALL_STRING_H */
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