1 /* Copyright (c) 2007-2021. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SIMGRID_MC_TYPE_HPP
7 #define SIMGRID_MC_TYPE_HPP
16 #include "xbt/asserts.h"
19 #include "src/mc/inspect/LocationList.hpp"
20 #include "src/mc/mc_forward.hpp"
25 /** A member of a structure, union
27 * Inheritance is seen as a special member as well.
31 using flags_type = int;
32 static constexpr flags_type INHERITANCE_FLAG = 1;
33 static constexpr flags_type VIRTUAL_POINTER_FLAG = 2;
37 /** Whether this member represent some inherited part of the object */
40 /** Name of the member (if any) */
43 /** DWARF location expression for locating the location of the member */
44 simgrid::dwarf::DwarfExpression location_expression;
46 std::size_t byte_size = 0; // Do we really need this?
49 simgrid::mc::Type* type = nullptr;
51 bool isInheritance() const { return this->flags & INHERITANCE_FLAG; }
52 bool isVirtualPointer() const { return this->flags & VIRTUAL_POINTER_FLAG; }
54 /** Whether the member is at a fixed offset from the base address */
55 bool has_offset_location() const
57 // Recognize the expression `DW_OP_plus_uconst(offset)`:
58 return location_expression.size() == 1 && location_expression[0].atom == DW_OP_plus_uconst;
61 /** Get the offset of the member
63 * This is only valid is the member is at a fixed offset from the base.
64 * This is often the case (for C types, C++ type without virtual
67 * If the location is more complex, the location expression has
68 * to be evaluated (which might need accessing the memory).
72 xbt_assert(this->has_offset_location());
73 return this->location_expression[0].number;
76 /** Set the location of the member as a fixed offset */
77 void offset(int new_offset)
79 // Set the expression to be `DW_OP_plus_uconst(offset)`:
81 op.atom = DW_OP_plus_uconst;
82 op.number = new_offset;
83 this->location_expression = {op};
87 /** A type in the model-checked program */
92 /** The DWARF TAG of the type (e.g. DW_TAG_array_type) */
94 unsigned id = 0; /* Offset in the section (in hexadecimal form) */
95 std::string name; /* Name of the type */
96 int byte_size = 0; /* Size in bytes */
97 int element_count = 0; /* Number of elements for array type */
98 unsigned type_id = 0; /* DW_AT_type id */
99 std::vector<Member> members; /* if DW_TAG_structure_type, DW_TAG_class_type, DW_TAG_union_type*/
101 simgrid::mc::Type* subtype = nullptr; // DW_AT_type
102 simgrid::mc::Type* full_type = nullptr; // The same (but more complete) type
106 } // namespace simgrid