-#include "mc/Frame.hpp"
-#include "mc/ObjectInformation.hpp"
-#include "mc/Variable.hpp"
+/* Copyright (c) 2014-2015. 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. */
+
+#include <cstdint>
+
+#include <vector>
+
+#include "src/mc/Frame.hpp"
+#include "src/mc/ObjectInformation.hpp"
+#include "src/mc/Variable.hpp"
namespace simgrid {
namespace mc {
-ObjectInformation::ObjectInformation()
-{
- this->flags = 0;
- this->start = nullptr;
- this->end = nullptr;
- this->start_exec = nullptr;
- this->end_exec = nullptr;
- this->start_rw = nullptr;
- this->end_rw = nullptr;
- this->start_ro = nullptr;
- this->end_ro = nullptr;
-}
+ObjectInformation::ObjectInformation() {}
-/** Find the DWARF offset for this ELF object
- *
- * An offset is applied to address found in DWARF:
- *
- * * for an executable obejct, addresses are virtual address
- * (there is no offset) i.e.
- * \f$\text{virtual address} = \{dwarf address}\f$;
+/* For an executable object, addresses are virtual address
+ * (there is no offset) i.e.
+ * \f$\text{virtual address} = \{dwarf address}\f$;
*
- * * for a shared object, the addreses are offset from the begining
- * of the shared object (the base address of the mapped shared
- * object must be used as offset
- * i.e. \f$\text{virtual address} = \text{shared object base address}
+ * For a shared object, the addreses are offset from the begining
+ * of the shared object (the base address of the mapped shared
+ * object must be used as offset
+ * i.e. \f$\text{virtual address} = \text{shared object base address}
* + \text{dwarf address}\f$.
*/
void *ObjectInformation::base_address() const
{
+ // For an executable (more precisely for a ET_EXEC) the base it 0:
if (this->executable())
return nullptr;
+ // For an a shared-object (ET_DYN, including position-independant executables)
+ // the base address is its lowest address:
void *result = this->start_exec;
- if (this->start_rw != NULL && result > (void *) this->start_rw)
+ if (this->start_rw != nullptr && result > (void *) this->start_rw)
result = this->start_rw;
- if (this->start_ro != NULL && result > (void *) this->start_ro)
+ if (this->start_ro != nullptr && result > (void *) this->start_ro)
result = this->start_ro;
return result;
}
-/* Find a function by instruction pointer */
simgrid::mc::Frame* ObjectInformation::find_function(const void *ip) const
{
/* This is implemented by binary search on a sorted array.
*
- * We do quite a lot ot those so we want this to be cache efficient.
+ * We do quite a lot of those so we want this to be cache efficient.
* We pack the only information we need in the index entries in order
* to successfully do the binary search. We do not need the high_pc
* during the binary search (only at the end) so it is not included
* in the index entry. We could use parallel arrays as well.
*
- * We cannot really use the std:: alogrithm for this.
+ * We cannot really use the std:: algorithm for this.
* We could use std::binary_search by including the high_pc inside
* the FunctionIndexEntry.
*/
/* At this point, the search is over.
* Either we have found the correct function or we do not know
* any function corresponding to this instruction address.
- * Only at the point do we derefernce the function pointer. */
- else if (ip < base[k].function->high_pc)
+ * Only at the point do we dereference the function pointer. */
+ else if ((std::uint64_t) ip < base[k].function->range.end())
return base[k].function;
else
return nullptr;
return nullptr;
}
+void ObjectInformation::remove_global_variable(const char* name)
+{
+ typedef std::vector<Variable>::size_type size_type;
+
+ if (this->global_variables.empty())
+ return;
+
+ // Binary search:
+ size_type first = 0;
+ size_type last = this->global_variables.size() - 1;
+
+ while (first <= last) {
+ size_type cursor = first + (last - first) / 2;
+ simgrid::mc::Variable& current_var = this->global_variables[cursor];
+ int cmp = current_var.name.compare(name);
+
+ if (cmp == 0) {
+
+ // Find the whole range:
+ size_type first = cursor;
+ while (first != 0 && this->global_variables[first - 1].name == name)
+ first--;
+ size_type size = this->global_variables.size();
+ size_type last = cursor;
+ while (last != size - 1 && this->global_variables[last + 1].name == name)
+ last++;
+
+ // Remove the whole range:
+ this->global_variables.erase(
+ this->global_variables.begin() + first,
+ this->global_variables.begin() + last + 1);
+
+ return;
+ } else if (cmp < 0)
+ first = cursor + 1;
+ else if (cursor != 0)
+ last = cursor - 1;
+ else
+ break;
+ }
+}
+
+/** Ignore a local variable in a scope
+ *
+ * Ignore all instances of variables with a given name in
+ * any (possibly inlined) subprogram with a given namespaced
+ * name.
+ *
+ * @param var_name Name of the local variable to ignore
+ * @param subprogram_name Name of the subprogram to ignore (nullptr for any)
+ * @param subprogram (possibly inlined) Subprogram of the scope current scope
+ * @param scope Current scope
+ */
+static void remove_local_variable(simgrid::mc::Frame& scope,
+ const char *var_name,
+ const char *subprogram_name,
+ simgrid::mc::Frame const& subprogram)
+{
+ typedef std::vector<Variable>::size_type size_type;
+
+ // If the current subprogram matches the given name:
+ if ((subprogram_name == nullptr ||
+ (!subprogram.name.empty()
+ && subprogram.name == subprogram_name))
+ && !scope.variables.empty()) {
+
+ // Try to find the variable and remove it:
+ size_type start = 0;
+ size_type end = scope.variables.size() - 1;
+
+ // Binary search:
+ while (start <= end) {
+ size_type cursor = start + (end - start) / 2;
+ simgrid::mc::Variable& current_var = scope.variables[cursor];
+ int compare = current_var.name.compare(var_name);
+ if (compare == 0) {
+ // Variable found, remove it:
+ scope.variables.erase(scope.variables.begin() + cursor);
+ break;
+ } else if (compare < 0)
+ start = cursor + 1;
+ else if (cursor != 0)
+ end = cursor - 1;
+ else
+ break;
+ }
+ }
+
+ // And recursive processing in nested scopes:
+ for (simgrid::mc::Frame& nested_scope : scope.scopes) {
+ // The new scope may be an inlined subroutine, in this case we want to use its
+ // namespaced name in recursive calls:
+ simgrid::mc::Frame const& nested_subprogram =
+ nested_scope.tag ==
+ DW_TAG_inlined_subroutine ? nested_scope : subprogram;
+ remove_local_variable(nested_scope, var_name, subprogram_name,
+ nested_subprogram);
+ }
+}
+
+void ObjectInformation::remove_local_variable(
+ const char* var_name, const char* subprogram_name)
+{
+ for (auto& entry : this->subprograms)
+ simgrid::mc::remove_local_variable(entry.second,
+ var_name, subprogram_name, entry.second);
+}
+
}
}
\ No newline at end of file
