* \param unit the DIE of the compile unit of the current DIE
* \param frame containg frame if any
*/
-static void MC_dwarf_handle_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame);
+static void MC_dwarf_handle_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace);
/** \brief Process a type DIE
*/
-static void MC_dwarf_handle_type_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit);
+static void MC_dwarf_handle_type_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace);
/** \brief Calls MC_dwarf_handle_die on all childrend of the given die
*
* \param unit the DIE of the compile unit of the current DIE
* \param frame containg frame if any
*/
-static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame);
+static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace);
/** \brief Handle a variable (DW_TAG_variable or other)
*
* \param unit the DIE of the compile unit of the current DIE
* \param frame containg frame if any
*/
-static void MC_dwarf_handle_variable_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame);
+static void MC_dwarf_handle_variable_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace);
/** \brief Convert a libdw DWARF expression into a MC representation of the location
*
}
}
+/** \brief A class of DWARF tags (DW_TAG_*)
+ */
+typedef enum mc_tag_class {
+ mc_tag_unkonwn,
+ mc_tag_type,
+ mc_tag_subprogram,
+ mc_tag_variable,
+ mc_tag_scope
+} mc_tag_class;
+
+static mc_tag_class MC_dwarg_tag_classify(int tag) {
+ switch (tag) {
+
+ case DW_TAG_array_type:
+ case DW_TAG_class_type:
+ case DW_TAG_enumeration_type:
+ case DW_TAG_typedef:
+ case DW_TAG_pointer_type:
+ case DW_TAG_string_type:
+ case DW_TAG_structure_type:
+ case DW_TAG_subroutine_type:
+ case DW_TAG_union_type:
+ case DW_TAG_ptr_to_member_type:
+ case DW_TAG_set_type:
+ case DW_TAG_subrange_type:
+ case DW_TAG_base_type:
+ case DW_TAG_const_type:
+ case DW_TAG_file_type:
+ case DW_TAG_packed_type:
+ case DW_TAG_volatile_type:
+ case DW_TAG_restrict_type:
+ case DW_TAG_interface_type:
+ case DW_TAG_unspecified_type:
+ case DW_TAG_mutable_type:
+ case DW_TAG_shared_type:
+ return mc_tag_type;
+
+ case DW_TAG_subprogram:
+ return mc_tag_subprogram;
+
+ case DW_TAG_variable:
+ case DW_TAG_formal_parameter:
+ return mc_tag_variable;
+
+ case DW_TAG_lexical_block:
+ case DW_TAG_try_block:
+ case DW_TAG_inlined_subroutine:
+ return mc_tag_scope;
+
+ default:
+ return mc_tag_unkonwn;
+
+ }
+}
+
#define MC_DW_CLASS_UNKNOWN 0
#define MC_DW_CLASS_ADDRESS 1 // Location in the address space of the program
#define MC_DW_CLASS_BLOCK 2 // Arbitrary block of bytes
case DW_FORM_block:
case DW_FORM_block1:
return MC_DW_CLASS_BLOCK;
+ case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_data4:
case DW_FORM_data8:
}
}
+/** \brief Find the frame base of a given frame
+ *
+ * \param ip Instruction pointer
+ * \param frame
+ * \param unw_cursor
+ */
+void* mc_find_frame_base(void* ip, dw_frame_t frame, unw_cursor_t* unw_cursor) {
+ switch(frame->frame_base->type) {
+ case e_dw_loclist:
+ {
+ int loclist_cursor;
+ for(loclist_cursor=0; loclist_cursor < xbt_dynar_length(frame->frame_base->location.loclist); loclist_cursor++){
+ dw_location_entry_t entry = xbt_dynar_get_as(frame->frame_base->location.loclist, loclist_cursor, dw_location_entry_t);
+ if((ip >= entry->lowpc) && (ip < entry->highpc)){
+ return (void*) MC_dwarf_resolve_location(unw_cursor, entry->location, NULL);
+ }
+ }
+ return NULL;
+ }
+ // Not handled:
+ default:
+ return NULL;
+ }
+}
+
/** \brief Get the location expression or location list from an attribute
*
* Processes direct expressions as well as location lists.
// The attribute is a reference to a location list entry:
case DW_FORM_sec_offset:
+ case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_data4:
case DW_FORM_data8:
Dwarf_Attribute attr;
dwarf_attr_integrate(child, DW_AT_data_member_location, &attr);
- int klass = MC_dwarf_form_get_class(dwarf_whatform(&attr));
+ int form = dwarf_whatform(&attr);
+ int klass = MC_dwarf_form_get_class(form);
switch (klass) {
case MC_DW_CLASS_EXPRLOC:
case MC_DW_CLASS_BLOCK:
// It's supposed to be possible in DWARF2 but I couldn't find its semantic
// in the spec.
default:
- xbt_die("Can't handle form class 0x%x (%i) as DW_AT_member_location", klass, klass);
+ xbt_die(
+ "Can't handle form class (%i) / form 0x%x as DW_AT_member_location",
+ klass, form);
}
}
* \param unit compilation unit of the current DIE
* \return MC representation of the type
*/
-static dw_type_t MC_dwarf_die_to_type(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit) {
+static dw_type_t MC_dwarf_die_to_type(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace) {
dw_type_t type = xbt_new0(s_dw_type_t, 1);
type->type = -1;
case DW_TAG_union_type:
case DW_TAG_class_type:
MC_dwarf_add_members(info, die, unit, type);
+ char* new_namespace = namespace == NULL ? xbt_strdup(type->name)
+ : bprintf("%s::%s", namespace, type->name);
+ MC_dwarf_handle_children(info, die, unit, frame, new_namespace);
+ free(new_namespace);
+ break;
}
return type;
}
-static void MC_dwarf_handle_type_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit) {
- dw_type_t type = MC_dwarf_die_to_type(info, die, unit);
+static void MC_dwarf_handle_type_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace) {
+ dw_type_t type = MC_dwarf_die_to_type(info, die, unit, frame, namespace);
char* key = bprintf("%" PRIx64, (uint64_t) type->id);
xbt_dict_set(info->types, key, type, NULL);
static int mc_anonymous_variable_index = 0;
-static dw_variable_t MC_die_to_variable(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame) {
+static dw_variable_t MC_die_to_variable(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace) {
// Drop declaration:
if (MC_dwarf_attr_flag(die, DW_AT_declaration, false))
return NULL;
dw_variable_t variable = xbt_new0(s_dw_variable_t, 1);
variable->dwarf_offset = dwarf_dieoffset(die);
variable->global = frame == NULL; // Can be override base on DW_AT_location
- variable->name = xbt_strdup(MC_dwarf_attr_string(die, DW_AT_name));
+
+ const char* name = MC_dwarf_attr_string(die, DW_AT_name);
+ variable->name = xbt_strdup(name);
+
variable->type_origin = MC_dwarf_at_type(die);
int klass = MC_dwarf_form_get_class(dwarf_whatform(&attr_location));
klass, klass, (void*) variable->dwarf_offset, variable->name);
}
+ if(namespace && variable->global) {
+ char* old_name = variable->name;
+ variable->name = bprintf("%s::%s", namespace, old_name);
+ free(old_name);
+ }
+
// The current code needs a variable name,
// generate a fake one:
if(!variable->name) {
return variable;
}
-static void MC_dwarf_handle_variable_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame) {
- dw_variable_t variable = MC_die_to_variable(info, die, unit, frame);
+static void MC_dwarf_handle_variable_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace) {
+ dw_variable_t variable = MC_die_to_variable(info, die, unit, frame, namespace);
if(variable==NULL)
return;
MC_dwarf_register_variable(info, frame, variable);
}
-static void MC_dwarf_handle_subprogram_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t parent_frame) {
+static void MC_dwarf_handle_subprogram_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t parent_frame, const char* namespace) {
dw_frame_t frame = xbt_new0(s_dw_frame_t, 1);
frame->start = dwarf_dieoffset(die);
- const char* name = MC_dwarf_at_linkage_name(die);
- if (name==NULL)
- name = MC_dwarf_attr_string(die, DW_AT_name);
- frame->name = xbt_strdup(name);
+ const char* name = MC_dwarf_attr_string(die, DW_AT_name);
+ frame->name = namespace ? bprintf("%s::%s", namespace, name) : xbt_strdup(name);
// This is the base address for DWARF addresses.
// Relocated addresses are offset from this base address.
frame->frame_base = MC_dwarf_at_location(info, die, DW_AT_frame_base);
frame->end = -1; // This one is now useless:
- // Handle children:
- MC_dwarf_handle_children(info, die, unit, frame);
-
// Register it:
- xbt_dict_set(info->local_variables, frame->name, frame, NULL);
+ xbt_dynar_push(info->subprograms, &frame);
+
+ // Handle children:
+ MC_dwarf_handle_children(info, die, unit, frame, namespace);
}
-static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame) {
+static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace) {
Dwarf_Die child;
int res;
for (res=dwarf_child(die, &child); res==0; res=dwarf_siblingof(&child,&child)) {
- MC_dwarf_handle_die(info, &child, unit, frame);
+ MC_dwarf_handle_die(info, &child, unit, frame, namespace);
}
}
-static void MC_dwarf_handle_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame) {
+static void MC_dwarf_handle_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace) {
int tag = dwarf_tag(die);
- switch (tag) {
- case DW_TAG_array_type:
- case DW_TAG_class_type:
- case DW_TAG_enumeration_type:
- case DW_TAG_typedef:
- case DW_TAG_pointer_type:
- case DW_TAG_string_type:
- case DW_TAG_structure_type:
- case DW_TAG_subroutine_type:
- case DW_TAG_union_type:
- case DW_TAG_ptr_to_member_type:
- case DW_TAG_set_type:
- case DW_TAG_subrange_type:
- case DW_TAG_base_type:
- case DW_TAG_const_type:
- case DW_TAG_file_type:
- case DW_TAG_packed_type:
- case DW_TAG_volatile_type:
- case DW_TAG_restrict_type:
- case DW_TAG_interface_type:
- case DW_TAG_unspecified_type:
- case DW_TAG_mutable_type:
- case DW_TAG_shared_type:
- MC_dwarf_handle_type_die(info, die, unit);
+ mc_tag_class klass = MC_dwarg_tag_classify(tag);
+ switch (klass) {
+
+ // Type:
+ case mc_tag_type:
+ MC_dwarf_handle_type_die(info, die, unit, frame, namespace);
break;
- case DW_TAG_subprogram:
- MC_dwarf_handle_subprogram_die(info, die, unit, frame);
+
+ // Program:
+ case mc_tag_subprogram:
+ MC_dwarf_handle_subprogram_die(info, die, unit, frame, namespace);
return;
- // case DW_TAG_formal_parameter:
- case DW_TAG_variable:
- case DW_TAG_formal_parameter:
- MC_dwarf_handle_variable_die(info, die, unit, frame);
+
+ // Variable:
+ case mc_tag_variable:
+ MC_dwarf_handle_variable_die(info, die, unit, frame, namespace);
+ break;
+
+ // Scope:
+ case mc_tag_scope:
+ // TODO
break;
- }
- // Recursive processing of children DIE:
- MC_dwarf_handle_children(info, die, unit, frame);
+ default:
+ break;
+
+ }
}
void MC_dwarf_get_variables(mc_object_info_t info) {
Dwarf_Off next_offset = 0;
size_t length;
while (dwarf_nextcu (dwarf, offset, &next_offset, &length, NULL, NULL, NULL) == 0) {
- Dwarf_Die die;
-
- if(dwarf_offdie(dwarf, offset+length, &die)!=NULL) {
+ Dwarf_Die unit_die;
- // Skip C++ for now (we will add support for it soon):
- int lang = dwarf_srclang(&die);
- if((lang==DW_LANG_C_plus_plus) || (lang==DW_LANG_ObjC_plus_plus)) {
- offset = next_offset;
- continue;
+ if(dwarf_offdie(dwarf, offset+length, &unit_die)!=NULL) {
+ Dwarf_Die child;
+ int res;
+ for (res=dwarf_child(&unit_die, &child); res==0; res=dwarf_siblingof(&child,&child)) {
+ MC_dwarf_handle_die(info, &child, &unit_die, NULL, NULL);
}
-
- MC_dwarf_handle_die(info, &die, &die, NULL);
}
offset = next_offset;
}
