* 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>
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 name;
}
+static Dwarf_Off MC_dwarf_attr_dieoffset(Dwarf_Die* die, int attribute) {
+ Dwarf_Attribute attr;
+ 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_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;
+ 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_integrate_addr(Dwarf_Die* die, int attribute) {
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);
+ "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;
}
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",
+ "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),
- type->id, type->name);
+ (uint64_t) type->id, type->name);
}
if (len==1 && expr[0].atom == DW_OP_plus_uconst) {
member->offset = expr[0].number;
if (!dwarf_formudata(&attr, &offset))
member->offset = offset;
else
- xbt_die("Cannot get %s location <%p>%s",
+ xbt_die("Cannot get %s location <%"PRIx64">%s",
MC_dwarf_attr_integrate_string(child, DW_AT_name),
- type->id, type->name);
+ (uint64_t) type->id, type->name);
break;
}
case MC_DW_CLASS_LOCLISTPTR:
member->type = tag;
// Global Offset:
- member->id = (void *) dwarf_dieoffset(&child);
+ member->id = dwarf_dieoffset(&child);
const char* name = MC_dwarf_attr_integrate_string(&child, DW_AT_name);
if(name)
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);
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);
const char* prefix = "";
switch (type->type) {
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;
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) {
xbt_dict_set(info->full_types_by_name, type->name, type, 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->object_info = info;
const char* name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
variable->name = xbt_strdup(name);
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);
+ "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) {
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;
+ 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(&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:
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);
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;
+}
+
+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);
// (Template) Subprogram declaration:
- if (MC_dwarf_attr_flag(die, DW_AT_declaration, false))
+ if(klass==mc_tag_subprogram && MC_dwarf_attr_flag(die, DW_AT_declaration, false))
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;
- const char* name = MC_dwarf_attr_integrate_string(die, DW_AT_name);
- frame->name = namespace ? bprintf("%s::%s", namespace, name) : xbt_strdup(name);
+ 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);
+ }
+
+ 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_integrate_addr(die, DW_AT_high_pc);
- frame->low_pc = ((char*) base) + MC_dwarf_attr_integrate_addr(die, DW_AT_low_pc);
- 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);
+ // 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;
+
+ switch(MC_dwarf_form_get_class(dwarf_whatform(&attr))) {
- frame->end = -1; // This one is now useless:
+ // DW_AT_high_pc if an offset from the low_pc:
+ case MC_DW_CLASS_CONSTANT:
+
+ if (dwarf_formsdata(&attr, &offset) !=0)
+ xbt_die("Could not read constant");
+ frame->high_pc = (void*) ((char*)frame->low_pc + offset);
+ break;
+
+ // 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:
- const char* key = bprintf("%" PRIx64, (uint64_t) frame->start);
- xbt_dict_set(info->subprograms, key, frame, NULL);
+ 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);
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) {
MC_dwarf_handle_type_die(info, die, unit, frame, namespace);
break;
- // Program:
+ // Subprogram or scope:
case mc_tag_subprogram:
- MC_dwarf_handle_subprogram_die(info, die, unit, frame, namespace);
+ case mc_tag_scope:
+ MC_dwarf_handle_scope_die(info, die, unit, frame, namespace);
return;
// Variable:
MC_dwarf_handle_variable_die(info, die, unit, frame, namespace);
break;
- // Scope:
- case mc_tag_scope:
- // TODO
- break;
-
case mc_tag_namespace:
mc_dwarf_handle_namespace_die(info, die, unit, frame, namespace);
break;
