1 #ifndef SIMGRID_MC_DWARF_EXPRESSION_HPP
2 #define SIMGRID_MC_DWARF_EXPRESSION_HPP
8 #include "src/mc/AddressSpace.hpp"
13 class evaluation_error : std::runtime_error {
15 evaluation_error(const char* what): std::runtime_error(what) {}
16 ~evaluation_error() noexcept(true);
19 struct ExpressionContext {
21 cursor(nullptr), frame_base(nullptr), address_space(nullptr),
22 object_info(nullptr), process_index(simgrid::mc::ProcessIndexMissing) {}
26 simgrid::mc::AddressSpace* address_space;
27 simgrid::mc::ObjectInformation* object_info;
31 typedef std::vector<Dwarf_Op> DwarfExpression;
33 class ExpressionStack {
35 typedef std::uintptr_t value_type;
36 static const std::size_t max_size = 64;
38 uintptr_t stack_[max_size];
41 ExpressionStack() : size_(0) {}
44 std::size_t size() const { return size_; }
45 bool empty() const { return size_ == 0; }
46 void clear() { size_ = 0; }
47 uintptr_t& operator[](int i) { return stack_[i]; }
48 uintptr_t const& operator[](int i) const { return stack_[i]; }
52 throw evaluation_error("Empty stack");
53 return stack_[size_ - 1];
55 value_type& top(unsigned i)
58 throw evaluation_error("Invalid element");
59 return stack_[size_ - 1 - i];
63 void push(value_type value)
65 if (size_ == max_size)
66 throw evaluation_error("Dwarf stack overflow");
67 stack_[size_++] = value;
72 throw evaluation_error("Stack underflow");
73 return stack_[--size_];
77 void dup() { push(top()); }
80 void execute(const Dwarf_Op* ops, std::size_t n,
81 ExpressionContext const& context, ExpressionStack& stack);
84 void execute(simgrid::dwarf::DwarfExpression const& expression,
85 ExpressionContext const& context, ExpressionStack& stack)
87 execute(expression.data(), expression.size(), context, stack);