1 /* Copyright (c) 2007-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #ifndef SIMGRID_MC_TYPE_HPP
8 #define SIMGRID_MC_TYPE_HPP
16 #include <xbt/asserts.h>
20 #include "src/mc/mc_forward.h"
21 #include "src/mc/LocationList.hpp"
26 /** A member of a structure, union
28 * Inheritance is seen as a special member as well.
34 /** Whether this member represent some inherited part of the object */
35 bool inheritance = false;
37 /** Name of the member (if any) */
40 /** DWARF location expression for locating the location of the member */
41 simgrid::dwarf::DwarfExpression location_expression;
43 std::size_t byte_size = 0; // Do we really need this?
46 simgrid::mc::Type* type = nullptr;
48 /** Whether the member is at a fixed offset from the base address */
49 bool has_offset_location() const
51 // Recognize the expression `DW_OP_plus_uconst(offset)`:
52 return location_expression.size() == 1 &&
53 location_expression[0].atom == DW_OP_plus_uconst;
56 /** Get the offset of the member
58 * This is only valid is the member is at a fixed offset from the base.
59 * This is often the case (for C types, C++ type without virtual
62 * If the location is more complex, the location expression has
63 * to be evaluated (which might need accessing the memory).
67 xbt_assert(this->has_offset_location());
68 return this->location_expression[0].number;
71 /** Set the location of the member as a fixed offset */
72 void offset(int new_offset)
74 // Set the expression to be `DW_OP_plus_uconst(offset)`:
76 op.atom = DW_OP_plus_uconst;
77 op.number = new_offset;
78 this->location_expression = { op };
83 /** A type in the model-checked program */
88 /** The DWARF TAG of the type (e.g. DW_TAG_array_type) */
90 unsigned id = 0; /* Offset in the section (in hexadecimal form) */
91 std::string name; /* Name of the type */
92 int byte_size = 0; /* Size in bytes */
93 int element_count = 0; /* Number of elements for array type */
94 unsigned type_id = 0; /* DW_AT_type id */
95 std::vector<Member> members; /* if DW_TAG_structure_type, DW_TAG_class_type, DW_TAG_union_type*/
97 simgrid::mc::Type* subtype = nullptr; // DW_AT_type
98 simgrid::mc::Type* full_type = nullptr; // The same (but more complete) type