-/* Copyright (c) 2008-2013. The SimGrid Team.
+/* Copyright (c) 2008-2014. 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 <stdlib.h>
+#define DW_LANG_Objc DW_LANG_ObjC /* fix spelling error in older dwarf.h */
#include <dwarf.h>
#include <elfutils/libdw.h>
#include <inttypes.h>
#include <xbt/log.h>
#include <xbt/sysdep.h>
+#include "mc_object_info.h"
#include "mc_private.h"
+static void MC_dwarf_register_global_variable(mc_object_info_t info, dw_variable_t variable);
+static void MC_register_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable);
+static void MC_dwarf_register_non_global_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable);
+static void MC_dwarf_register_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable);
+
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_dwarf, mc, "DWARF processing");
/** \brief The default DW_TAG_lower_bound for a given DW_AT_language.
* \param die DIE for the DW_TAG_enumeration_type or DW_TAG_subrange_type
* \param unit DIE of the DW_TAG_compile_unit
*/
-static uint64_t MC_dwarf_subrange_element_count(Dwarf_Die* die, Dwarf_Die* unit);
+static uint64_t MC_dwarf_subrange_element_count(Dwarf_Die * die,
+ Dwarf_Die * unit);
/** \brief Computes the number of elements of a given DW_TAG_array_type.
*
* \param die DIE for the DW_TAG_array_type
*/
-static uint64_t MC_dwarf_array_element_count(Dwarf_Die* die, Dwarf_Die* unit);
+static uint64_t MC_dwarf_array_element_count(Dwarf_Die * die, Dwarf_Die * unit);
/** \brief Process a DIE
*
* \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, const char* namespace);
+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, dw_frame_t frame, const char* namespace);
+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, const char* namespace);
+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, const char* namespace);
+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 Get the DW_TAG_type of the DIE
*
* \param die DIE
* \return DW_TAG_type attribute as a new string (NULL if none)
*/
-static char* MC_dwarf_at_type(Dwarf_Die* die);
+static char *MC_dwarf_at_type(Dwarf_Die * die);
/** \brief Get the name of an attribute (DW_AT_*) from its code
*
* \param attr attribute code (see the DWARF specification)
* \return name of the attribute
*/
-const char* MC_dwarf_attrname(int attr) {
+const char *MC_dwarf_attrname(int attr)
+{
switch (attr) {
#include "mc_dwarf_attrnames.h"
default:
* \param tag tag code (see the DWARF specification)
* \return name of the tag
*/
-const char* MC_dwarf_tagname(int tag) {
+const char *MC_dwarf_tagname(int tag)
+{
switch (tag) {
#include "mc_dwarf_tagnames.h"
case DW_TAG_invalid:
mc_tag_namespace
} mc_tag_class;
-static mc_tag_class MC_dwarf_tag_classify(int tag) {
+static mc_tag_class MC_dwarf_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_reference_type:
- case DW_TAG_rvalue_reference_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;
-
- case DW_TAG_namespace:
- return mc_tag_namespace;
+ 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_reference_type:
+ case DW_TAG_rvalue_reference_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_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_catch_block:
+ case DW_TAG_inlined_subroutine:
+ case DW_TAG_with_stmt:
+ return mc_tag_scope;
+
+ case DW_TAG_namespace:
+ return mc_tag_namespace;
- default:
- return mc_tag_unknown;
+ default:
+ return mc_tag_unknown;
}
}
#define MC_DW_CLASS_MACPTR 9
#define MC_DW_CLASS_RANGELISTPTR 10
-static int MC_dwarf_form_get_class(int form) {
- switch(form) {
+/** \brief Find the DWARF data class for a given DWARF data form
+ *
+ * This mapping is defined in the DWARF spec.
+ *
+ * \param form The form (values taken from the DWARF spec)
+ * \return An internal representation for the corresponding class
+ * */
+static int MC_dwarf_form_get_class(int form)
+{
+ switch (form) {
case DW_FORM_addr:
return MC_DW_CLASS_ADDRESS;
case DW_FORM_block2:
return MC_DW_CLASS_FLAG;
case DW_FORM_exprloc:
return MC_DW_CLASS_EXPRLOC;
- // TODO sec offset
- // TODO indirect
+ // TODO sec offset
+ // TODO indirect
default:
return MC_DW_CLASS_UNKNOWN;
}
* \param die DIE
* \return name of the tag of this DIE
*/
-static inline const char* MC_dwarf_die_tagname(Dwarf_Die* die) {
+static inline const char *MC_dwarf_die_tagname(Dwarf_Die * die)
+{
return MC_dwarf_tagname(dwarf_tag(die));
}
/** \brief Get an attribute of a given DIE as a string
*
- * \param the DIE
+ * \param die the DIE
* \param attribute attribute
* \return value of the given attribute of the given DIE
*/
-static const char* MC_dwarf_attr_string(Dwarf_Die* die, int attribute) {
+static const char *MC_dwarf_attr_integrate_string(Dwarf_Die * die,
+ int attribute)
+{
Dwarf_Attribute attr;
if (!dwarf_attr_integrate(die, attribute, &attr)) {
- return NULL;
+ return NULL;
} else {
- return dwarf_formstring(&attr);
+ return dwarf_formstring(&attr);
}
}
/** \brief Get the linkage name of a DIE.
*
- * Use either DW_AT_linkage_name or DW_AR_MIPS_linkage_name.
+ * Use either DW_AT_linkage_name or DW_AT_MIPS_linkage_name.
+ * DW_AT_linkage_name is standardized since DWARF 4.
+ * Before this version of DWARF, the MIPS extensions
+ * DW_AT_MIPS_linkage_name is used (at least by GCC).
*
- * \param DIE
+ * \param the DIE
* \return linkage name of the given DIE (or NULL)
* */
-static const char* MC_dwarf_at_linkage_name(Dwarf_Die* die) {
- const char* name = MC_dwarf_attr_string(die, DW_AT_linkage_name);
+static const char *MC_dwarf_at_linkage_name(Dwarf_Die * die)
+{
+ const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_linkage_name);
if (!name)
- name = MC_dwarf_attr_string(die, DW_AT_MIPS_linkage_name);
+ name = MC_dwarf_attr_integrate_string(die, DW_AT_MIPS_linkage_name);
return name;
}
-static char* MC_dwarf_at_type(Dwarf_Die* die) {
+static Dwarf_Off MC_dwarf_attr_dieoffset(Dwarf_Die * die, int attribute)
+{
Dwarf_Attribute attr;
- if (dwarf_hasattr_integrate(die, DW_AT_type)) {
- dwarf_attr_integrate(die, DW_AT_type, &attr);
- Dwarf_Die subtype_die;
- if (dwarf_formref_die(&attr, &subtype_die)==NULL) {
- xbt_die("Could not find DIE for type");
- }
- Dwarf_Off subtype_global_offset = dwarf_dieoffset(&subtype_die);
- return bprintf("%" PRIx64 , subtype_global_offset);
- }
- else return NULL;
+ if (dwarf_hasattr_integrate(die, attribute)) {
+ dwarf_attr_integrate(die, attribute, &attr);
+ Dwarf_Die subtype_die;
+ if (dwarf_formref_die(&attr, &subtype_die) == NULL) {
+ xbt_die("Could not find DIE");
+ }
+ return dwarf_dieoffset(&subtype_die);
+ } else
+ return 0;
+}
+
+static Dwarf_Off MC_dwarf_attr_integrate_dieoffset(Dwarf_Die * die,
+ int attribute)
+{
+ Dwarf_Attribute attr;
+ if (dwarf_hasattr_integrate(die, attribute)) {
+ dwarf_attr_integrate(die, DW_AT_type, &attr);
+ Dwarf_Die subtype_die;
+ if (dwarf_formref_die(&attr, &subtype_die) == NULL) {
+ xbt_die("Could not find DIE");
+ }
+ return dwarf_dieoffset(&subtype_die);
+ } else
+ return 0;
+}
+
+/** \brief Find the type/subtype (DW_AT_type) for a DIE
+ *
+ * \param dit the DIE
+ * \return DW_AT_type reference as a global offset in hexadecimal (or NULL)
+ */
+static char *MC_dwarf_at_type(Dwarf_Die * die)
+{
+ Dwarf_Off offset = MC_dwarf_attr_integrate_dieoffset(die, DW_AT_type);
+ return offset == 0 ? NULL : bprintf("%" PRIx64, offset);
}
-static uint64_t MC_dwarf_attr_addr(Dwarf_Die* die, int attribute) {
+static uint64_t MC_dwarf_attr_integrate_addr(Dwarf_Die * die, int attribute)
+{
Dwarf_Attribute attr;
- if(dwarf_attr_integrate(die, attribute, &attr)==NULL)
+ if (dwarf_attr_integrate(die, attribute, &attr) == NULL)
return 0;
Dwarf_Addr value;
if (dwarf_formaddr(&attr, &value) == 0)
return 0;
}
-static uint64_t MC_dwarf_attr_uint(Dwarf_Die* die, int attribute, uint64_t default_value) {
+static uint64_t MC_dwarf_attr_integrate_uint(Dwarf_Die * die, int attribute,
+ uint64_t default_value)
+{
Dwarf_Attribute attr;
- if (dwarf_attr_integrate(die, attribute, &attr)==NULL)
+ if (dwarf_attr_integrate(die, attribute, &attr) == NULL)
return default_value;
Dwarf_Word value;
- return dwarf_formudata(dwarf_attr_integrate(die, attribute, &attr), &value) == 0 ? (uint64_t) value : default_value;
+ return dwarf_formudata(dwarf_attr_integrate(die, attribute, &attr),
+ &value) == 0 ? (uint64_t) value : default_value;
}
-static bool MC_dwarf_attr_flag(Dwarf_Die* die, int attribute, int integrate) {
+static bool MC_dwarf_attr_flag(Dwarf_Die * die, int attribute, bool integrate)
+{
Dwarf_Attribute attr;
if ((integrate ? dwarf_attr_integrate(die, attribute, &attr)
- : dwarf_attr(die, attribute, &attr))==0)
+ : dwarf_attr(die, attribute, &attr)) == 0)
return false;
bool result;
if (dwarf_formflag(&attr, &result))
- xbt_die("Unexpected form for attribute %s",
- MC_dwarf_attrname(attribute));
+ xbt_die("Unexpected form for attribute %s", MC_dwarf_attrname(attribute));
return result;
}
-static uint64_t MC_dwarf_default_lower_bound(int lang) {
- switch(lang) {
+/** \brief Find the default lower bound for a given language
+ *
+ * The default lower bound of an array (when DW_TAG_lower_bound
+ * is missing) depends on the language of the compilation unit.
+ *
+ * \param lang Language of the compilation unit (values defined in the DWARF spec)
+ * \return Default lower bound of an array in this compilation unit
+ * */
+static uint64_t MC_dwarf_default_lower_bound(int lang)
+{
+ switch (lang) {
case DW_LANG_C:
case DW_LANG_C89:
case DW_LANG_C99:
case DW_LANG_Cobol85:
return 1;
default:
- xbt_die("No default MT_TAG_lower_bound for language %i and none given", lang);
+ xbt_die("No default DW_TAG_lower_bound for language %i and none given",
+ lang);
return 0;
}
}
-static uint64_t MC_dwarf_subrange_element_count(Dwarf_Die* die, Dwarf_Die* unit) {
- xbt_assert(dwarf_tag(die)==DW_TAG_enumeration_type ||dwarf_tag(die)==DW_TAG_subrange_type,
- "MC_dwarf_subrange_element_count called with DIE of type %s", MC_dwarf_die_tagname(die));
+/** \brief Finds the number of elements in a DW_TAG_subrange_type or DW_TAG_enumeration_type DIE
+ *
+ * \param die the DIE
+ * \param unit DIE of the compilation unit
+ * \return number of elements in the range
+ * */
+static uint64_t MC_dwarf_subrange_element_count(Dwarf_Die * die,
+ Dwarf_Die * unit)
+{
+ xbt_assert(dwarf_tag(die) == DW_TAG_enumeration_type
+ || dwarf_tag(die) == DW_TAG_subrange_type,
+ "MC_dwarf_subrange_element_count called with DIE of type %s",
+ MC_dwarf_die_tagname(die));
// Use DW_TAG_count if present:
if (dwarf_hasattr_integrate(die, DW_AT_count)) {
- return MC_dwarf_attr_uint(die, DW_AT_count, 0);
+ return MC_dwarf_attr_integrate_uint(die, DW_AT_count, 0);
}
-
// Otherwise compute DW_TAG_upper_bound-DW_TAG_lower_bound + 1:
if (!dwarf_hasattr_integrate(die, DW_AT_upper_bound)) {
- // This is not really 0, but the code expects this (we do not know):
+ // This is not really 0, but the code expects this (we do not know):
return 0;
}
- uint64_t upper_bound = MC_dwarf_attr_uint(die, DW_AT_upper_bound, -1);
+ uint64_t upper_bound =
+ MC_dwarf_attr_integrate_uint(die, DW_AT_upper_bound, -1);
uint64_t lower_bound = 0;
if (dwarf_hasattr_integrate(die, DW_AT_lower_bound)) {
- lower_bound = MC_dwarf_attr_uint(die, DW_AT_lower_bound, -1);
+ lower_bound = MC_dwarf_attr_integrate_uint(die, DW_AT_lower_bound, -1);
} else {
- lower_bound = MC_dwarf_default_lower_bound(dwarf_srclang(unit));
+ lower_bound = MC_dwarf_default_lower_bound(dwarf_srclang(unit));
}
return upper_bound - lower_bound + 1;
}
-static uint64_t MC_dwarf_array_element_count(Dwarf_Die* die, Dwarf_Die* unit) {
- xbt_assert(dwarf_tag(die)==DW_TAG_array_type,
- "MC_dwarf_array_element_count called with DIE of type %s", MC_dwarf_die_tagname(die));
+/** \brief Finds the number of elements in a array type (DW_TAG_array_type)
+ *
+ * The compilation unit might be needed because the default lower
+ * bound depends on the language of the compilation unit.
+ *
+ * \param die the DIE of the DW_TAG_array_type
+ * \param unit the DIE of the compilation unit
+ * \return number of elements in this array type
+ * */
+static uint64_t MC_dwarf_array_element_count(Dwarf_Die * die, Dwarf_Die * unit)
+{
+ xbt_assert(dwarf_tag(die) == DW_TAG_array_type,
+ "MC_dwarf_array_element_count called with DIE of type %s",
+ MC_dwarf_die_tagname(die));
int result = 1;
Dwarf_Die child;
int res;
- for (res=dwarf_child(die, &child); res==0; res=dwarf_siblingof(&child,&child)) {
- int child_tag = dwarf_tag(&child);
- if (child_tag==DW_TAG_subrange_type ||child_tag==DW_TAG_enumeration_type) {
+ for (res = dwarf_child(die, &child); res == 0;
+ res = dwarf_siblingof(&child, &child)) {
+ int child_tag = dwarf_tag(&child);
+ if (child_tag == DW_TAG_subrange_type
+ || child_tag == DW_TAG_enumeration_type) {
result *= MC_dwarf_subrange_element_count(&child, unit);
}
}
// ***** dw_type_t
-static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member, Dwarf_Die* child) {
+/** \brief Initialize the location of a member of a type
+ * (DW_AT_data_member_location of a DW_TAG_member).
+ *
+ * \param type a type (struct, class)
+ * \param member the member of the type
+ * \param child DIE of the member (DW_TAG_member)
+ */
+static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member,
+ Dwarf_Die * child)
+{
if (dwarf_hasattr(child, DW_AT_data_bit_offset)) {
xbt_die("Can't groke DW_AT_data_bit_offset.");
}
if (!dwarf_hasattr_integrate(child, DW_AT_data_member_location)) {
if (type->type != DW_TAG_union_type) {
- xbt_die(
- "Missing DW_AT_data_member_location field in DW_TAG_member %s of type <%p>%s",
- member->name, type->id, type->name);
+ xbt_die
+ ("Missing DW_AT_data_member_location field in DW_TAG_member %s of type <%"
+ PRIx64 ">%s", member->name, (uint64_t) type->id, type->name);
} else {
return;
}
case MC_DW_CLASS_BLOCK:
// Location expression:
{
- Dwarf_Op* expr;
+ Dwarf_Op *expr;
size_t len;
if (dwarf_getlocation(&attr, &expr, &len)) {
- xbt_die(
- "Could not read location expression DW_AT_data_member_location in DW_TAG_member %s of type <%p>%s",
- MC_dwarf_attr_string(child, DW_AT_name),
- type->id, type->name);
+ xbt_die
+ ("Could not read location expression DW_AT_data_member_location in DW_TAG_member %s of type <%"
+ PRIx64 ">%s", MC_dwarf_attr_integrate_string(child, DW_AT_name),
+ (uint64_t) type->id, type->name);
}
- if (len==1 && expr[0].atom == DW_OP_plus_uconst) {
- member->offset = expr[0].number;
+ if (len == 1 && expr[0].atom == DW_OP_plus_uconst) {
+ member->offset = expr[0].number;
} else {
mc_dwarf_expression_init(&member->location, len, expr);
}
if (!dwarf_formudata(&attr, &offset))
member->offset = offset;
else
- xbt_die("Cannot get %s location <%p>%s",
- MC_dwarf_attr_string(child, DW_AT_name),
- type->id, type->name);
+ xbt_die("Cannot get %s location <%" PRIx64 ">%s",
+ MC_dwarf_attr_integrate_string(child, DW_AT_name),
+ (uint64_t) type->id, type->name);
break;
}
case MC_DW_CLASS_LOCLISTPTR:
// 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 (%i) / form 0x%x as DW_AT_member_location",
- klass, form);
+ xbt_die("Can't handle form class (%i) / form 0x%x as DW_AT_member_location",
+ klass, form);
}
}
-static void MC_dwarf_add_members(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_type_t type) {
+static void dw_type_free_voidp(void *t)
+{
+ dw_type_free((dw_type_t) * (void **) t);
+}
+
+/** \brief Populate the list of members of a type
+ *
+ * \param info ELF object containing the type DIE
+ * \param die DIE of the type
+ * \param unit DIE of the compilation unit containing the type DIE
+ * \param type the type
+ */
+static void MC_dwarf_add_members(mc_object_info_t info, Dwarf_Die * die,
+ Dwarf_Die * unit, dw_type_t type)
+{
int res;
Dwarf_Die child;
xbt_assert(!type->members);
- type->members = xbt_dynar_new(sizeof(dw_type_t), (void(*)(void*))dw_type_free);
- for (res=dwarf_child(die, &child); res==0; res=dwarf_siblingof(&child,&child)) {
- if (dwarf_tag(&child)==DW_TAG_member) {
+ type->members =
+ xbt_dynar_new(sizeof(dw_type_t), (void (*)(void *)) dw_type_free_voidp);
+ for (res = dwarf_child(die, &child); res == 0;
+ res = dwarf_siblingof(&child, &child)) {
+ int tag = dwarf_tag(&child);
+ if (tag == DW_TAG_member || tag == DW_TAG_inheritance) {
// Skip declarations:
if (MC_dwarf_attr_flag(&child, DW_AT_declaration, false))
continue;
// Skip compile time constants:
- if(dwarf_hasattr(&child, DW_AT_const_value))
+ if (dwarf_hasattr(&child, DW_AT_const_value))
continue;
// TODO, we should use another type (because is is not a type but a member)
dw_type_t member = xbt_new0(s_dw_type_t, 1);
- member->type = -1;
- member->id = NULL;
+ member->type = tag;
+
+ // Global Offset:
+ member->id = dwarf_dieoffset(&child);
- const char* name = MC_dwarf_attr_string(&child, DW_AT_name);
- if(name)
+ const char *name = MC_dwarf_attr_integrate_string(&child, DW_AT_name);
+ if (name)
member->name = xbt_strdup(name);
else
member->name = NULL;
- member->byte_size = MC_dwarf_attr_uint(&child, DW_AT_byte_size, 0);
+ member->byte_size =
+ MC_dwarf_attr_integrate_uint(&child, DW_AT_byte_size, 0);
member->element_count = -1;
member->dw_type_id = MC_dwarf_at_type(&child);
member->members = NULL;
member->is_pointer_type = 0;
member->offset = 0;
- if(dwarf_hasattr(&child, DW_AT_data_bit_offset)) {
+ if (dwarf_hasattr(&child, DW_AT_data_bit_offset)) {
xbt_die("Can't groke DW_AT_data_bit_offset.");
}
MC_dwarf_fill_member_location(type, member, &child);
if (!member->dw_type_id) {
- xbt_die("Missing type for member %s of <%p>%s", member->name, type->id, type->name);
+ xbt_die("Missing type for member %s of <%" PRIx64 ">%s", member->name,
+ (uint64_t) type->id, type->name);
}
xbt_dynar_push(type->members, &member);
* \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, dw_frame_t frame, const char* namespace) {
+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;
- type->id = NULL;
+ type->id = 0;
type->name = NULL;
type->byte_size = 0;
type->element_count = -1;
type->type = dwarf_tag(die);
// Global Offset
- type->id = (void *) dwarf_dieoffset(die);
+ type->id = dwarf_dieoffset(die);
- char* prefix = "";
+ const char *prefix = "";
switch (type->type) {
case DW_TAG_structure_type:
prefix = "struct ";
prefix = "";
}
- const char* name = MC_dwarf_attr_string(die, DW_AT_name);
- if (name!=NULL) {
- type->name = namespace ? bprintf("%s%s::%s", prefix, namespace, name) : bprintf("%s%s", prefix, name);
+ const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
+ if (name != NULL) {
+ type->name =
+ namespace ? bprintf("%s%s::%s", prefix, namespace,
+ name) : bprintf("%s%s", prefix, name);
}
- XBT_DEBUG("Processing type <%p>%s", type->id, type->name);
-
type->dw_type_id = MC_dwarf_at_type(die);
// Computation of the byte_size;
if (dwarf_hasattr_integrate(die, DW_AT_byte_size))
- type->byte_size = MC_dwarf_attr_uint(die, DW_AT_byte_size, 0);
- else if (type->type == DW_TAG_array_type || type->type==DW_TAG_structure_type || type->type==DW_TAG_class_type) {
+ type->byte_size = MC_dwarf_attr_integrate_uint(die, DW_AT_byte_size, 0);
+ else if (type->type == DW_TAG_array_type
+ || type->type == DW_TAG_structure_type
+ || type->type == DW_TAG_class_type) {
Dwarf_Word size;
- if (dwarf_aggregate_size(die, &size)==0) {
+ if (dwarf_aggregate_size(die, &size) == 0) {
type->byte_size = size;
}
}
switch (type->type) {
case DW_TAG_array_type:
- type->element_count = MC_dwarf_array_element_count(die, unit);
- // TODO, handle DW_byte_stride and (not) DW_bit_stride
- break;
+ type->element_count = MC_dwarf_array_element_count(die, unit);
+ // TODO, handle DW_byte_stride and (not) DW_bit_stride
+ break;
case DW_TAG_pointer_type:
case DW_TAG_reference_type:
case DW_TAG_structure_type:
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, name);
- MC_dwarf_handle_children(info, die, unit, frame, new_namespace);
- free(new_namespace);
- break;
+ MC_dwarf_add_members(info, die, unit, type);
+ char *new_namespace = namespace == NULL ? xbt_strdup(type->name)
+ : bprintf("%s::%s", namespace, 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_frame_t frame, const char* namespace) {
+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);
+ char *key = bprintf("%" PRIx64, (uint64_t) type->id);
xbt_dict_set(info->types, key, type, NULL);
+ xbt_free(key);
- if(type->name && type->byte_size!=0) {
+ if (type->name && type->byte_size != 0) {
xbt_dict_set(info->full_types_by_name, type->name, 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, const char* namespace) {
+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)
+{
// Skip declarations:
if (MC_dwarf_attr_flag(die, DW_AT_declaration, false))
return NULL;
// Skip compile time constants:
- if(dwarf_hasattr(die, DW_AT_const_value))
+ if (dwarf_hasattr(die, DW_AT_const_value))
return NULL;
Dwarf_Attribute attr_location;
- if (dwarf_attr(die, DW_AT_location, &attr_location)==NULL) {
+ if (dwarf_attr(die, DW_AT_location, &attr_location) == NULL) {
// No location: do not add it ?
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->global = frame == NULL; // Can be override base on DW_AT_location
+ variable->object_info = info;
- const char* name = MC_dwarf_attr_string(die, DW_AT_name);
+ const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
variable->name = xbt_strdup(name);
variable->type_origin = MC_dwarf_at_type(die);
int form = dwarf_whatform(&attr_location);
- int klass = form == DW_FORM_sec_offset ? MC_DW_CLASS_CONSTANT : MC_dwarf_form_get_class(form);
+ int klass =
+ form ==
+ DW_FORM_sec_offset ? MC_DW_CLASS_CONSTANT : MC_dwarf_form_get_class(form);
switch (klass) {
case MC_DW_CLASS_EXPRLOC:
case MC_DW_CLASS_BLOCK:
// Location expression:
{
- Dwarf_Op* expr;
+ Dwarf_Op *expr;
size_t len;
if (dwarf_getlocation(&attr_location, &expr, &len)) {
- xbt_die(
- "Could not read location expression in DW_AT_location of variable <%p>%s",
- (void*) variable->dwarf_offset, variable->name);
+ xbt_die
+ ("Could not read location expression in DW_AT_location of variable <%"
+ PRIx64 ">%s", (uint64_t) variable->dwarf_offset, variable->name);
}
- if (len==1 && expr[0].atom == DW_OP_addr) {
+ if (len == 1 && expr[0].atom == DW_OP_addr) {
variable->global = 1;
- Dwarf_Off offset = expr[0].number;
- // TODO, Why is this different base on the object?
- Dwarf_Off base = strcmp(info->file_name, xbt_binary_name) !=0 ? (Dwarf_Off) info->start_exec : 0;
- variable->address = (void*) (base + offset);
+ uintptr_t offset = (uintptr_t) expr[0].number;
+ uintptr_t base = (uintptr_t) MC_object_base_address(info);
+ variable->address = (void *) (base + offset);
} else {
- mc_dwarf_location_list_init_from_expression(&variable->locations, len, expr);
+ mc_dwarf_location_list_init_from_expression(&variable->locations, len,
+ expr);
}
break;
case MC_DW_CLASS_LOCLISTPTR:
case MC_DW_CLASS_CONSTANT:
// Reference to location list:
- mc_dwarf_location_list_init(&variable->locations, info, die, &attr_location);
+ mc_dwarf_location_list_init(&variable->locations, info, die,
+ &attr_location);
break;
default:
- xbt_die("Unexpected form 0x%x (%i), class 0x%x (%i) list for location in <%p>%s",
- form, form, klass, klass, (void*) variable->dwarf_offset, variable->name);
+ xbt_die("Unexpected form 0x%x (%i), class 0x%x (%i) list for location in <%"
+ PRIx64 ">%s", form, form, klass, klass,
+ (uint64_t) variable->dwarf_offset, variable->name);
}
// Handle start_scope:
if (dwarf_hasattr(die, DW_AT_start_scope)) {
Dwarf_Attribute attr;
dwarf_attr(die, DW_AT_start_scope, &attr);
- int form = dwarf_whatform(&attr);
+ int form = dwarf_whatform(&attr);
int klass = MC_dwarf_form_get_class(form);
- switch(klass) {
+ switch (klass) {
case MC_DW_CLASS_CONSTANT:
- {
- Dwarf_Word value;
- variable->start_scope = dwarf_formudata(&attr, &value) == 0 ? (size_t) value : 0;
- break;
- }
+ {
+ Dwarf_Word value;
+ variable->start_scope =
+ dwarf_formudata(&attr, &value) == 0 ? (size_t) value : 0;
+ break;
+ }
+ case MC_DW_CLASS_RANGELISTPTR: // TODO
default:
- xbt_die("Unhandled form 0x%x, class 0x%X for DW_AT_start_scope of variable %s",
- form, klass, name==NULL ? "?" : name);
+ xbt_die
+ ("Unhandled form 0x%x, class 0x%X for DW_AT_start_scope of variable %s",
+ form, klass, name == NULL ? "?" : name);
}
}
- if(namespace && variable->global) {
- char* old_name = 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) {
+ if (!variable->name) {
variable->name = bprintf("@anonymous#%i", mc_anonymous_variable_index++);
}
return variable;
}
-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;
+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, const char* namespace) {
+static void mc_frame_free_voipd(dw_frame_t * p)
+{
+ mc_frame_free(*p);
+ *p = NULL;
+}
- // (Template) Subprogram declaration:
- if (MC_dwarf_attr_flag(die, DW_AT_declaration, false))
- return;
+static void MC_dwarf_handle_scope_die(mc_object_info_t info, Dwarf_Die * die,
+ Dwarf_Die * unit, dw_frame_t parent_frame,
+ const char *namespace)
+{
+ // TODO, handle DW_TAG_type/DW_TAG_location for DW_TAG_with_stmt
+ int tag = dwarf_tag(die);
+ mc_tag_class klass = MC_dwarf_tag_classify(tag);
- // Abstract inline instance (DW_AT_inline != DW_INL_not_inlined):
- if (dwarf_func_inline(die))
+ // (Template) Subprogram declaration:
+ if (klass == mc_tag_subprogram
+ && MC_dwarf_attr_flag(die, DW_AT_declaration, false))
return;
- // This is probably not a concrete instance:
- // DWARF2/3 and DWARF4 do not agree on the meaning of DW_INL_not_inlined.
- // For DWARF2/3, the subprogram is abstract.
- // For DARF4, the subprogram is not abstract.
- if(!dwarf_hasattr_integrate(die, DW_AT_low_pc))
- return;
+ if (klass == mc_tag_scope)
+ xbt_assert(parent_frame, "No parent scope for this scope");
dw_frame_t frame = xbt_new0(s_dw_frame_t, 1);
- frame->start = dwarf_dieoffset(die);
+ frame->tag = tag;
+ frame->id = dwarf_dieoffset(die);
+ frame->object_info = info;
+
+ if (klass == mc_tag_subprogram) {
+ const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
+ frame->name =
+ namespace ? bprintf("%s::%s", namespace, 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);
+ frame->abstract_origin_id =
+ MC_dwarf_attr_dieoffset(die, DW_AT_abstract_origin);
// This is the base address for DWARF addresses.
// Relocated addresses are offset from this base address.
// See DWARF4 spec 7.5
- void* base = info->flags & MC_OBJECT_INFO_EXECUTABLE ? 0 : MC_object_base_address(info);
+ void *base = MC_object_base_address(info);
// Variables are filled in the (recursive) call of MC_dwarf_handle_children:
- frame->variables = xbt_dynar_new(sizeof(dw_variable_t), dw_variable_free_voidp);
- frame->high_pc = ((char*) base) + MC_dwarf_attr_addr(die, DW_AT_high_pc);
- frame->low_pc = ((char*) base) + MC_dwarf_attr_addr(die, DW_AT_low_pc);
+ frame->variables =
+ xbt_dynar_new(sizeof(dw_variable_t), dw_variable_free_voidp);
+
+ // TODO, support DW_AT_ranges
+ uint64_t low_pc = MC_dwarf_attr_integrate_addr(die, DW_AT_low_pc);
+ frame->low_pc = low_pc ? ((char *) base) + low_pc : 0;
+ if (low_pc) {
+ // DW_AT_high_pc:
+ Dwarf_Attribute attr;
+ if (!dwarf_attr_integrate(die, DW_AT_high_pc, &attr)) {
+ xbt_die("Missing DW_AT_high_pc matching with DW_AT_low_pc");
+ }
+
+ Dwarf_Sword offset;
+ Dwarf_Addr high_pc;
- if(frame->high_pc==0 || frame->low_pc==0)
- xbt_die("Could not resolve highpc/lowpc");
+ switch (MC_dwarf_form_get_class(dwarf_whatform(&attr))) {
- Dwarf_Attribute attr_frame_base;
- if (!dwarf_attr_integrate(die, DW_AT_frame_base, &attr_frame_base))
- xbt_die("Coult not find DW_AT_frame_base for subprogram %s %p", frame->name, frame->start);
- mc_dwarf_location_list_init(&frame->frame_base, info, die, &attr_frame_base);
+ // DW_AT_high_pc if an offset from the low_pc:
+ case MC_DW_CLASS_CONSTANT:
- frame->end = -1; // This one is now useless:
+ if (dwarf_formsdata(&attr, &offset) != 0)
+ xbt_die("Could not read constant");
+ frame->high_pc = (void *) ((char *) frame->low_pc + offset);
+ break;
- // Register it:
- xbt_dynar_push(info->subprograms, &frame);
+ // DW_AT_high_pc is a relocatable address:
+ case MC_DW_CLASS_ADDRESS:
+ if (dwarf_formaddr(&attr, &high_pc) != 0)
+ xbt_die("Could not read address");
+ frame->high_pc = ((char *) base) + high_pc;
+ break;
+
+ default:
+ xbt_die("Unexpected class for DW_AT_high_pc");
+
+ }
+ }
+ if (klass == mc_tag_subprogram) {
+ Dwarf_Attribute attr_frame_base;
+ if (dwarf_attr_integrate(die, DW_AT_frame_base, &attr_frame_base))
+ mc_dwarf_location_list_init(&frame->frame_base, info, die,
+ &attr_frame_base);
+ }
+
+ frame->scopes =
+ xbt_dynar_new(sizeof(dw_frame_t), (void_f_pvoid_t) mc_frame_free_voipd);
+
+ // Register it:
+ if (klass == mc_tag_subprogram) {
+ char *key = bprintf("%" PRIx64, (uint64_t) frame->id);
+ xbt_dict_set(info->subprograms, key, frame, NULL);
+ xbt_free(key);
+ } else if (klass == mc_tag_scope) {
+ xbt_dynar_push(parent_frame->scopes, &frame);
+ }
// Handle children:
MC_dwarf_handle_children(info, die, unit, frame, namespace);
}
-static void mc_dwarf_handle_namespace_die(
- mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace) {
- const char* name = MC_dwarf_attr_string(die, DW_AT_name);
- if(frame)
+static void mc_dwarf_handle_namespace_die(mc_object_info_t info,
+ Dwarf_Die * die, Dwarf_Die * unit,
+ dw_frame_t frame,
+ const char *namespace)
+{
+ const char *name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
+ if (frame)
xbt_die("Unexpected namespace in a subprogram");
- char* new_namespace = namespace == NULL ? xbt_strdup(name)
- : bprintf("%s::%s", namespace, name);
+ char *new_namespace = namespace == NULL ? xbt_strdup(name)
+ : bprintf("%s::%s", namespace, name);
MC_dwarf_handle_children(info, die, unit, frame, new_namespace);
+ xbt_free(new_namespace);
}
-static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame, const char* namespace) {
+static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die * die,
+ Dwarf_Die * unit, dw_frame_t frame,
+ const char *namespace)
+{
+ // For each child DIE:
Dwarf_Die child;
int res;
- for (res=dwarf_child(die, &child); res==0; res=dwarf_siblingof(&child,&child)) {
+ for (res = dwarf_child(die, &child); res == 0;
+ res = dwarf_siblingof(&child, &child)) {
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, const char* namespace) {
+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);
mc_tag_class klass = MC_dwarf_tag_classify(tag);
switch (klass) {
// Type:
- case mc_tag_type:
- MC_dwarf_handle_type_die(info, die, unit, frame, namespace);
- break;
+ case mc_tag_type:
+ MC_dwarf_handle_type_die(info, die, unit, frame, namespace);
+ break;
- // Program:
- case mc_tag_subprogram:
- MC_dwarf_handle_subprogram_die(info, die, unit, frame, namespace);
- return;
+ // Subprogram or scope:
+ case mc_tag_subprogram:
+ case mc_tag_scope:
+ MC_dwarf_handle_scope_die(info, die, unit, frame, namespace);
+ return;
// Variable:
- case mc_tag_variable:
- MC_dwarf_handle_variable_die(info, die, unit, frame, namespace);
- break;
-
- // Scope:
- case mc_tag_scope:
- // TODO
- break;
+ case mc_tag_variable:
+ MC_dwarf_handle_variable_die(info, die, unit, frame, namespace);
+ break;
- case mc_tag_namespace:
- mc_dwarf_handle_namespace_die(info, die, unit, frame, namespace);
- break;
+ case mc_tag_namespace:
+ mc_dwarf_handle_namespace_die(info, die, unit, frame, namespace);
+ break;
- default:
- break;
+ default:
+ break;
}
}
-void MC_dwarf_get_variables(mc_object_info_t info) {
+/** \brief Populate the debugging informations of the given ELF object
+ *
+ * Read the DWARf information of the EFFL object and populate the
+ * lists of types, variables, functions.
+ */
+void MC_dwarf_get_variables(mc_object_info_t info)
+{
int fd = open(info->file_name, O_RDONLY);
- if (fd<0) {
+ if (fd < 0) {
xbt_die("Could not open file %s", info->file_name);
}
Dwarf *dwarf = dwarf_begin(fd, DWARF_C_READ);
- if (dwarf==NULL) {
- xbt_die("Your program must be compiled with -g");
+ if (dwarf == NULL) {
+ xbt_die("Your program must be compiled with -g (%s)", info->file_name);
}
-
+ // For each compilation unit:
Dwarf_Off offset = 0;
Dwarf_Off next_offset = 0;
size_t length;
- while (dwarf_nextcu (dwarf, offset, &next_offset, &length, NULL, NULL, NULL) == 0) {
+ while (dwarf_nextcu(dwarf, offset, &next_offset, &length, NULL, NULL, NULL) ==
+ 0) {
Dwarf_Die unit_die;
+ if (dwarf_offdie(dwarf, offset + length, &unit_die) != NULL) {
- if(dwarf_offdie(dwarf, offset+length, &unit_die)!=NULL) {
+ // For each child DIE:
Dwarf_Die child;
int res;
- for (res=dwarf_child(&unit_die, &child); res==0; res=dwarf_siblingof(&child,&child)) {
+ for (res = dwarf_child(&unit_die, &child); res == 0;
+ res = dwarf_siblingof(&child, &child)) {
MC_dwarf_handle_die(info, &child, &unit_die, NULL, NULL);
}
+
}
offset = next_offset;
}
dwarf_end(dwarf);
close(fd);
}
+
+/************************** Free functions *************************/
+
+void mc_frame_free(dw_frame_t frame)
+{
+ xbt_free(frame->name);
+ mc_dwarf_location_list_clear(&(frame->frame_base));
+ xbt_dynar_free(&(frame->variables));
+ xbt_dynar_free(&(frame->scopes));
+ xbt_free(frame);
+}
+
+void dw_type_free(dw_type_t t)
+{
+ xbt_free(t->name);
+ xbt_free(t->dw_type_id);
+ xbt_dynar_free(&(t->members));
+ mc_dwarf_expression_clear(&t->location);
+ xbt_free(t);
+}
+
+void dw_variable_free(dw_variable_t v)
+{
+ if (v) {
+ xbt_free(v->name);
+ xbt_free(v->type_origin);
+
+ if (v->locations.locations)
+ mc_dwarf_location_list_clear(&v->locations);
+ xbt_free(v);
+ }
+}
+
+void dw_variable_free_voidp(void *t)
+{
+ dw_variable_free((dw_variable_t) * (void **) t);
+}
+
+// ***** object_info
+
+
+
+mc_object_info_t MC_new_object_info(void)
+{
+ mc_object_info_t res = xbt_new0(s_mc_object_info_t, 1);
+ res->subprograms = xbt_dict_new_homogeneous((void (*)(void *)) mc_frame_free);
+ res->global_variables =
+ xbt_dynar_new(sizeof(dw_variable_t), dw_variable_free_voidp);
+ res->types = xbt_dict_new_homogeneous((void (*)(void *)) dw_type_free);
+ res->full_types_by_name = xbt_dict_new_homogeneous(NULL);
+ return res;
+}
+
+void MC_free_object_info(mc_object_info_t * info)
+{
+ xbt_free(&(*info)->file_name);
+ xbt_dict_free(&(*info)->subprograms);
+ xbt_dynar_free(&(*info)->global_variables);
+ xbt_dict_free(&(*info)->types);
+ xbt_dict_free(&(*info)->full_types_by_name);
+ xbt_free(info);
+ xbt_dynar_free(&(*info)->functions_index);
+ *info = NULL;
+}
+
+// ***** Helpers
+
+void *MC_object_base_address(mc_object_info_t info)
+{
+ if (info->flags & MC_OBJECT_INFO_EXECUTABLE)
+ return 0;
+ void *result = info->start_exec;
+ if (info->start_rw != NULL && result > (void *) info->start_rw)
+ result = info->start_rw;
+ if (info->start_ro != NULL && result > (void *) info->start_ro)
+ result = info->start_ro;
+ return result;
+}
+
+// ***** Functions index
+
+static int MC_compare_frame_index_items(mc_function_index_item_t a,
+ mc_function_index_item_t b)
+{
+ if (a->low_pc < b->low_pc)
+ return -1;
+ else if (a->low_pc == b->low_pc)
+ return 0;
+ else
+ return 1;
+}
+
+static void MC_make_functions_index(mc_object_info_t info)
+{
+ xbt_dynar_t index = xbt_dynar_new(sizeof(s_mc_function_index_item_t), NULL);
+
+ // Populate the array:
+ dw_frame_t frame = NULL;
+ xbt_dict_cursor_t cursor;
+ char *key;
+ xbt_dict_foreach(info->subprograms, cursor, key, frame) {
+ if (frame->low_pc == NULL)
+ continue;
+ s_mc_function_index_item_t entry;
+ entry.low_pc = frame->low_pc;
+ entry.high_pc = frame->high_pc;
+ entry.function = frame;
+ xbt_dynar_push(index, &entry);
+ }
+
+ mc_function_index_item_t base =
+ (mc_function_index_item_t) xbt_dynar_get_ptr(index, 0);
+
+ // Sort the array by low_pc:
+ qsort(base,
+ xbt_dynar_length(index),
+ sizeof(s_mc_function_index_item_t),
+ (int (*)(const void *, const void *)) MC_compare_frame_index_items);
+
+ info->functions_index = index;
+}
+
+static void MC_post_process_variables(mc_object_info_t info)
+{
+ unsigned cursor = 0;
+ dw_variable_t variable = NULL;
+ xbt_dynar_foreach(info->global_variables, cursor, variable) {
+ if (variable->type_origin) {
+ variable->type = xbt_dict_get_or_null(info->types, variable->type_origin);
+ }
+ }
+}
+
+static void mc_post_process_scope(mc_object_info_t info, dw_frame_t scope)
+{
+
+ if (scope->tag == DW_TAG_inlined_subroutine) {
+
+ // Attach correct namespaced name in inlined subroutine:
+ char *key = bprintf("%" PRIx64, (uint64_t) scope->abstract_origin_id);
+ dw_frame_t abstract_origin = xbt_dict_get_or_null(info->subprograms, key);
+ xbt_assert(abstract_origin, "Could not lookup abstract origin %s", key);
+ xbt_free(key);
+ scope->name = xbt_strdup(abstract_origin->name);
+
+ }
+ // Direct:
+ unsigned cursor = 0;
+ dw_variable_t variable = NULL;
+ xbt_dynar_foreach(scope->variables, cursor, variable) {
+ if (variable->type_origin) {
+ variable->type = xbt_dict_get_or_null(info->types, variable->type_origin);
+ }
+ }
+
+ // Recursive post-processing of nested-scopes:
+ dw_frame_t nested_scope = NULL;
+ xbt_dynar_foreach(scope->scopes, cursor, nested_scope)
+ mc_post_process_scope(info, nested_scope);
+
+}
+
+static void MC_post_process_functions(mc_object_info_t info)
+{
+ xbt_dict_cursor_t cursor;
+ char *key;
+ dw_frame_t subprogram = NULL;
+ xbt_dict_foreach(info->subprograms, cursor, key, subprogram) {
+ mc_post_process_scope(info, subprogram);
+ }
+}
+
+
+/** \brief Fill/lookup the "subtype" field.
+ */
+static void MC_resolve_subtype(mc_object_info_t info, dw_type_t type)
+{
+
+ if (type->dw_type_id == NULL)
+ return;
+ type->subtype = xbt_dict_get_or_null(info->types, type->dw_type_id);
+ if (type->subtype == NULL)
+ return;
+ if (type->subtype->byte_size != 0)
+ return;
+ if (type->subtype->name == NULL)
+ return;
+ // Try to find a more complete description of the type:
+ // We need to fix in order to support C++.
+
+ dw_type_t subtype =
+ xbt_dict_get_or_null(info->full_types_by_name, type->subtype->name);
+ if (subtype != NULL) {
+ type->subtype = subtype;
+ }
+
+}
+
+static void MC_post_process_types(mc_object_info_t info)
+{
+ xbt_dict_cursor_t cursor = NULL;
+ char *origin;
+ dw_type_t type;
+
+ // Lookup "subtype" field:
+ xbt_dict_foreach(info->types, cursor, origin, type) {
+ MC_resolve_subtype(info, type);
+
+ dw_type_t member;
+ unsigned int i = 0;
+ if (type->members != NULL)
+ xbt_dynar_foreach(type->members, i, member) {
+ MC_resolve_subtype(info, member);
+ }
+ }
+}
+
+/** \brief Finds informations about a given shared object/executable */
+mc_object_info_t MC_find_object_info(memory_map_t maps, const char *name,
+ int executable)
+{
+ mc_object_info_t result = MC_new_object_info();
+ if (executable)
+ result->flags |= MC_OBJECT_INFO_EXECUTABLE;
+ result->file_name = xbt_strdup(name);
+ MC_find_object_address(maps, result);
+ MC_dwarf_get_variables(result);
+ MC_post_process_types(result);
+ MC_post_process_variables(result);
+ MC_post_process_functions(result);
+ MC_make_functions_index(result);
+ return result;
+}
+
+/*************************************************************************/
+
+static int MC_dwarf_get_variable_index(xbt_dynar_t variables, char *var,
+ void *address)
+{
+
+ if (xbt_dynar_is_empty(variables))
+ return 0;
+
+ unsigned int cursor = 0;
+ int start = 0;
+ int end = xbt_dynar_length(variables) - 1;
+ dw_variable_t var_test = NULL;
+
+ while (start <= end) {
+ cursor = (start + end) / 2;
+ var_test =
+ (dw_variable_t) xbt_dynar_get_as(variables, cursor, dw_variable_t);
+ if (strcmp(var_test->name, var) < 0) {
+ start = cursor + 1;
+ } else if (strcmp(var_test->name, var) > 0) {
+ end = cursor - 1;
+ } else {
+ if (address) { /* global variable */
+ if (var_test->address == address)
+ return -1;
+ if (var_test->address > address)
+ end = cursor - 1;
+ else
+ start = cursor + 1;
+ } else { /* local variable */
+ return -1;
+ }
+ }
+ }
+
+ if (strcmp(var_test->name, var) == 0) {
+ if (address && var_test->address < address)
+ return cursor + 1;
+ else
+ return cursor;
+ } else if (strcmp(var_test->name, var) < 0)
+ return cursor + 1;
+ else
+ return cursor;
+
+}
+
+void MC_dwarf_register_global_variable(mc_object_info_t info,
+ dw_variable_t variable)
+{
+ int index =
+ MC_dwarf_get_variable_index(info->global_variables, variable->name,
+ variable->address);
+ if (index != -1)
+ xbt_dynar_insert_at(info->global_variables, index, &variable);
+ // TODO, else ?
+}
+
+void MC_dwarf_register_non_global_variable(mc_object_info_t info,
+ dw_frame_t frame,
+ dw_variable_t variable)
+{
+ xbt_assert(frame, "Frame is NULL");
+ int index =
+ MC_dwarf_get_variable_index(frame->variables, variable->name, NULL);
+ if (index != -1)
+ xbt_dynar_insert_at(frame->variables, index, &variable);
+ // TODO, else ?
+}
+
+void MC_dwarf_register_variable(mc_object_info_t info, dw_frame_t frame,
+ dw_variable_t variable)
+{
+ if (variable->global)
+ MC_dwarf_register_global_variable(info, variable);
+ else if (frame == NULL)
+ xbt_die("No frame for this local variable");
+ else
+ MC_dwarf_register_non_global_variable(info, frame, variable);
+}
+
+void MC_post_process_object_info(mc_process_t process, mc_object_info_t info)
+{
+ xbt_dict_cursor_t cursor = NULL;
+ char *key = NULL;
+ dw_type_t type = NULL;
+ xbt_dict_foreach(info->types, cursor, key, type) {
+
+ dw_type_t subtype = type;
+ while (subtype->type == DW_TAG_typedef || subtype->type == DW_TAG_volatile_type
+ || subtype->type == DW_TAG_const_type) {
+ if (subtype->subtype)
+ subtype = subtype->subtype;
+ else
+ break;
+ }
+
+ // Resolve full_type:
+ if (subtype->name && subtype->byte_size == 0) {
+ for (size_t i = 0; i != process->object_infos_size; ++i) {
+ dw_type_t same_type =
+ xbt_dict_get_or_null(process->object_infos[i]->full_types_by_name,
+ subtype->name);
+ if (same_type && same_type->name && same_type->byte_size) {
+ type->full_type = same_type;
+ break;
+ }
+ }
+ } else type->full_type = subtype;
+
+ }
+}
