X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/1610a3a014ca193868cd6ed987728201c15b423c..4bcfd40036f842e976d329cd0cee7349b8e0f4d6:/src/mc/DwarfExpression.hpp

diff --git a/src/mc/DwarfExpression.hpp b/src/mc/DwarfExpression.hpp
deleted file mode 100644
index b6713b22af..0000000000
--- a/src/mc/DwarfExpression.hpp
+++ /dev/null
@@ -1,155 +0,0 @@
-/* Copyright (c) 2015-2019. The SimGrid Team. All rights reserved.          */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#ifndef SIMGRID_MC_DWARF_EXPRESSION_HPP
-#define SIMGRID_MC_DWARF_EXPRESSION_HPP
-
-#include <cstdint>
-#include <cstdlib>
-
-#include <stdexcept> // runtime_error
-#include <utility>
-#include <vector>
-
-#include <elfutils/libdw.h>
-#include <libunwind.h>
-
-#include "src/mc/AddressSpace.hpp"
-#include "src/mc/mc_dwarf.hpp"
-#include "src/mc/mc_forward.hpp"
-
-/** @file DwarfExpression.hpp
- *
- *  Evaluation of DWARF location expressions.
- */
-
-namespace simgrid {
-namespace dwarf {
-
-/** A DWARF expression
- *
- *  DWARF defines a simple stack-based VM for evaluating expressions
- *  (such as locations of variables, etc.): a DWARF expression is
- *  just a sequence of dwarf instructions. We currently directly use
- *  `Dwarf_Op` from `dwarf.h` for dwarf instructions.
- */
-typedef std::vector<Dwarf_Op> DwarfExpression;
-
-/** Context of evaluation of a DWARF expression
- *
- *  Some DWARF instructions need to read the CPU registers,
- *  the process memory, etc. All those informations are gathered in
- *  the evaluation context.
- */
-class ExpressionContext {
-public:
-  ExpressionContext() :
-    cursor(nullptr), frame_base(nullptr), address_space(nullptr),
-    object_info(nullptr), process_index(simgrid::mc::ProcessIndexMissing) {}
-  /** CPU state (registers) */
-  unw_cursor_t* cursor;
-  void* frame_base;
-  /** Address space used to read memory */
-  simgrid::mc::AddressSpace* address_space;
-  simgrid::mc::ObjectInformation* object_info;
-  int process_index;
-};
-
-/** When an error happens in the execution of a DWARF expression */
-class evaluation_error : public std::runtime_error {
-public:
-  explicit evaluation_error(const char* what) : std::runtime_error(what) {}
-};
-
-/** A stack for evaluating a DWARF expression
- *
- *  DWARF expressions work by manipulating a stack of integer values.
- */
-class ExpressionStack {
-public:
-  typedef std::uintptr_t value_type;
-  static const std::size_t max_size = 64;
-private:
-  // Values of the stack (the top is stack_[size_ - 1]):
-  uintptr_t stack_[max_size] {0};
-  size_t size_;
-public:
-  ExpressionStack() : size_(0) {}
-
-  // Access:
-  std::size_t size() const { return size_; }
-  bool empty()       const { return size_ == 0; }
-  void clear()             { size_ = 0; }
-  uintptr_t&       operator[](int i)       { return stack_[i]; }
-  uintptr_t const& operator[](int i) const { return stack_[i]; }
-
-  /** Top of the stack */
-  value_type& top()
-  {
-    if (size_ == 0)
-      throw evaluation_error("Empty stack");
-    return stack_[size_ - 1];
-  }
-
-  /** Access the i-th element from the top of the stack */
-  value_type& top(unsigned i)
-  {
-    if (size_ < i)
-      throw evaluation_error("Invalid element");
-    return stack_[size_ - 1 - i];
-  }
-
-  /** Push a value on the top of the stack */
-  void push(value_type value)
-  {
-    if (size_ == max_size)
-      throw evaluation_error("DWARF stack overflow");
-    stack_[size_++] = value;
-  }
-
-  /* Pop a value from the top of the stack */
-  value_type pop()
-  {
-    if (size_ == 0)
-      throw evaluation_error("DWARF stack underflow");
-    return stack_[--size_];
-  }
-
-  // These are DWARF operations (DW_OP_foo):
-
-  /* Push a copy of the top-value (DW_OP_dup) */
-  void dup() { push(top()); }
-
-  /* Swap the two top-most values */
-  void swap() { std::swap(top(), top(1)); }
-};
-
-/** Executes a DWARF expression
- *
- *  @param ops     DWARF expression instructions
- *  @param n       number of instructions
- *  @param context evaluation context (registers, memory, etc.)
- *  @param stack   DWARf stack where the operations are executed
- */
-void execute(const Dwarf_Op* ops, std::size_t n,
-  ExpressionContext const& context, ExpressionStack& stack);
-
-/** Executes/evaluates a DWARF expression
- *
- *  @param expression DWARF expression to execute
- *  @param context    evaluation context (registers, memory, etc.)
- *  @param stack      DWARf stack where the operations are executed
- */
-inline
-void execute(simgrid::dwarf::DwarfExpression const& expression,
-  ExpressionContext const& context, ExpressionStack& stack)
-{
-  execute(expression.data(), expression.size(), context, stack);
-}
-
-}
-}
-
-#endif