string
drd_info_rep::get_child_name (tree t, int i) {
tag_info ti= info[L(t)];
int index= ti->get_index (i, N(t));
if (is_func (t, EXTERN) && N(t)>0 && is_atomic (t[0])) {
ti= info[make_tree_label ("extern:" * t[0]->label)];
index= ti->get_index (i-1, N(t));
}
if ((index<0) || (index>=N(ti->ci))) return "";
return get_child_name (L(t), index);
}
static int
add_structmember_from_die(Dwarf_Debug dbg, Dwarf_Die parent_die, Dwarf_Die die)
{
int ret = DW_DLV_ERROR;
Dwarf_Error err = 0;
Dwarf_Half tag = 0;
Dwarf_Off offset = 0;
Dwarf_Unsigned tid = 0;
Dwarf_Unsigned loc = 0;
basetype_t *t, *t2;
ret = dwarf_tag(die, &tag, &err);
if (ret != DW_DLV_OK) {
derror("error in dwarf_tag()");
goto error;
}
if (tag != DW_TAG_member)
return -1;
ret = get_offset_tid(die, &offset, &tid);
if (ret < 0) {
derror("error in get_offset_tid()");
goto error;
}
t = get_or_add_type(offset);
ret = get_child_name(dbg, die, t->name, 128);
if (ret < 0)
strncpy(t->name, "<unknown-structmbr>", 128);
t->ohm_type = OHM_TYPE_ALIAS;
ret = get_member_location(die, &loc);
if (ret < 0) {
derror("error in get_member_location()");
goto error;
}
// this is the struct member location and not the size; we will
// fix it later in refresh_compound_sizes.
t->size = loc;
t2 = get_or_add_type(tid);
t->nelem = 1;
t->elems = malloc(sizeof(t));
t->elems[0] = t2;
return 1;
error:
derror("error in add_structmember_from_die()");
return -1;
}
int
add_basetype_from_die(Dwarf_Debug dbg, Dwarf_Die parent_die, Dwarf_Die die)
{
int ret = DW_DLV_ERROR;
Dwarf_Error err = 0;
Dwarf_Off offset = 0;
Dwarf_Unsigned bsz = 0;
basetype_t *t;
if (is_base_type(die) != 1)
return -1;
ret = dwarf_die_CU_offset(die, &offset, &err);
if (ret != DW_DLV_OK) {
derror("error in dwarf_die_CU_offset()");
goto error;
}
ret = dwarf_bytesize(die, &bsz, &err);
if (ret != DW_DLV_OK) {
derror("error in dwarf_bytesize()");
goto error;
}
/* We construct a table of base types here so that we can iœndex it
* later to find the types of some of the probes on the stack. */
t = get_or_add_type(offset);
get_child_name(dbg, die, t->name, 128);
t->ohm_type = get_type_ohmtype(t);
t->size = bsz;
t->nelem = 1;
t->elems = NULL;
return 1;
error:
derror("error in add_basetype_from_die()");
return -1;
}
bool
drd_info_rep::heuristic_init_macro (string var, tree macro) {
//cout << "init_macro " << var << " -> " << macro << "\n";
tree_label l = make_tree_label (var);
tag_info old_ti= copy (info[l]);
int i, n= N(macro)-1;
set_arity (l, n, 0, ARITY_NORMAL, CHILD_DETAILED);
set_type (l, get_type (macro[n]));
set_with_like (l, heuristic_with_like (macro, ""));
//if (heuristic_with_like (macro, ""))
//cout << "With-like: " << var << LF;
for (i=0; i<n; i++) {
if (is_atomic (macro[i]))
if (l >= START_EXTENSIONS || get_child_name (l, i) == "")
set_child_name (l, i, macro[i]->label);
int type= TYPE_UNKNOWN;
tree arg (ARG, macro[i]);
tree env= arg_access (macro[n], arg, tree (ATTR), type);
//if (var == "section" || var == "section-title")
//cout << var << " -> " << env << ", " << macro << "\n";
//if (var == "math")
//cout << var << ", " << i << " -> " << type << ", " << env << ", " << macro << "\n";
set_type (l, i, type);
if (env != "") {
//if (var == "eqnarray*")
//cout << var << " -> " << env << "\n";
//if (var == "session")
//cout << var << " = " << macro << ", " << i << " -> " << env << "\n";
rewrite_symbolic_arguments (macro, env);
set_accessible (l, i, ACCESSIBLE_ALWAYS);
set_env (l, i, env);
}
}
//if (old_ti != info[l])
//cout << var << ": " << old_ti << " -> " << info[l] << "\n";
return (old_ti != info[l]);
}
int
add_complextype_from_die(Dwarf_Debug dbg, Dwarf_Die parent_die, Dwarf_Die die)
{
int ret = DW_DLV_ERROR, i, nsib;
Dwarf_Error err = 0;
Dwarf_Off offset = 0;
Dwarf_Half tag = 0;
Dwarf_Attribute attr;
Dwarf_Unsigned bsz = 0, tid = 0;
Dwarf_Die grandchild;
basetype_t *t, *t2;
ret = dwarf_tag(die, &tag, &err);
if (ret != DW_DLV_OK) {
derror("error in dwarf_tag()");
goto error;
}
if ((tag != DW_TAG_array_type) && (tag != DW_TAG_structure_type) &&
(tag != DW_TAG_typedef) && (tag != DW_TAG_pointer_type))
return -1;
switch (tag) {
case DW_TAG_array_type:
ret = get_offset_tid(die, &offset, &tid);
if (ret < 0) {
derror("error in get_offset_tid()");
goto error;
}
// get the child
dwarf_child(die, &grandchild, &err);
ret = dwarf_attr(grandchild, DW_AT_upper_bound, &attr, &err);
if (ret == DW_DLV_ERROR) {
derror("error in dwarf_attr(DW_AT_upper_bound)");
goto error;
} else if (ret == DW_DLV_OK)
get_number(attr, &bsz);
else
return 0;
t = get_or_add_type(offset);
snprintf(t->name, 128, "arr%u[]", (unsigned int)offset);
t->ohm_type = OHM_TYPE_ARRAY;
t->nelem = bsz+1;
t2 = get_or_add_type(tid);
t->size = t->nelem * get_type_size(t2);
t->elems = malloc(sizeof(t));
t->elems[0] = t2;
break;
case DW_TAG_structure_type:
ret = dwarf_die_CU_offset(die, &offset, &err);
if (ret != DW_DLV_OK) {
derror("error in dwarf_die_CU_offset()");
goto error;
}
t = get_or_add_type(offset);
strncpy(t->name, "struct ", 7);
ret = get_child_name(dbg, die, t->name+7, 128);
if (ret < 0)
strncpy(t->name, "<unknown-struct>", 128);
t->ohm_type = OHM_TYPE_STRUCT;
ret = dwarf_bytesize(die, &bsz, &err);
t->size = ((ret == DW_DLV_OK) ? bsz : 0);
// ensure that struct members get added to the table
nsib = traverse_die(&add_structmember_from_die, dbg, parent_die, die);
if (nsib < 0)
goto error;
t->nelem = nsib;
t->elems = malloc((t->nelem)*sizeof(t));
for (i = 0; i < t->nelem; i++)
t->elems[i] = &types_table[types_table_size-t->nelem-1+i];
break;
case DW_TAG_typedef:
ret = get_offset_tid(die, &offset, &tid);
if (ret < 0) {
derror("error in get_offset_tid()");
goto error;
}
t = get_or_add_type(offset);
t->ohm_type = OHM_TYPE_ALIAS;
t->size = 0;
t->nelem = 1;
t2 = get_or_add_type(tid);
t->elems = malloc(sizeof(t));
t->elems[0] = t2;
ret = get_child_name(dbg, die, t->name, 128);
if (ret < 0)
strncpy(t->name, "<unknown-typedef>", 128);
break;
case DW_TAG_pointer_type:
ret = get_offset_tid(die, &offset, &tid);
if (ret < 0) {
derror("error in get_offset_tid()");
goto error;
}
t = get_or_add_type(offset);
strncpy(t->name, "ptr", 128);
t->ohm_type = OHM_TYPE_PTR;
t->nelem = 1;
t->size = sizeof(void*);
t2 = get_type(tid);
t->size = get_type_size(t2);
t->elems = malloc(sizeof(t));
t->elems[0] = t2;
break;
default:
break;
}
return 1;
error:
derror("error in add_complextype_from_die()");
return -1;
}