1 /* Copyright (c) 2007-2019. 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
14 #include "xbt/asserts.h"
17 #include "src/mc/mc_forward.hpp"
18 #include "src/mc/LocationList.hpp"
23 /** A member of a structure, union
25 * Inheritance is seen as a special member as well.
29 typedef int flags_type;
30 static constexpr flags_type INHERITANCE_FLAG = 1;
31 static constexpr flags_type VIRTUAL_POINTER_FLAG = 2;
35 /** Whether this member represent some inherited part of the object */
38 /** Name of the member (if any) */
41 /** DWARF location expression for locating the location of the member */
42 simgrid::dwarf::DwarfExpression location_expression;
44 std::size_t byte_size = 0; // Do we really need this?
47 simgrid::mc::Type* type = nullptr;
49 bool isInheritance() const
51 return this->flags & INHERITANCE_FLAG;
53 bool isVirtualPointer() const
55 return this->flags & VIRTUAL_POINTER_FLAG;
58 /** Whether the member is at a fixed offset from the base address */
59 bool has_offset_location() const
61 // Recognize the expression `DW_OP_plus_uconst(offset)`:
62 return location_expression.size() == 1 &&
63 location_expression[0].atom == DW_OP_plus_uconst;
66 /** Get the offset of the member
68 * This is only valid is the member is at a fixed offset from the base.
69 * This is often the case (for C types, C++ type without virtual
72 * If the location is more complex, the location expression has
73 * to be evaluated (which might need accessing the memory).
77 xbt_assert(this->has_offset_location());
78 return this->location_expression[0].number;
81 /** Set the location of the member as a fixed offset */
82 void offset(int new_offset)
84 // Set the expression to be `DW_OP_plus_uconst(offset)`:
86 op.atom = DW_OP_plus_uconst;
87 op.number = new_offset;
88 this->location_expression = { op };
93 /** A type in the model-checked program */
98 /** The DWARF TAG of the type (e.g. DW_TAG_array_type) */
100 unsigned id = 0; /* Offset in the section (in hexadecimal form) */
101 std::string name; /* Name of the type */
102 int byte_size = 0; /* Size in bytes */
103 int element_count = 0; /* Number of elements for array type */
104 unsigned type_id = 0; /* DW_AT_type id */
105 std::vector<Member> members; /* if DW_TAG_structure_type, DW_TAG_class_type, DW_TAG_union_type*/
107 simgrid::mc::Type* subtype = nullptr; // DW_AT_type
108 simgrid::mc::Type* full_type = nullptr; // The same (but more complete) type