Dwarf_Unsigned DieHolder::get_bytesize(void)
{
Dwarf_Unsigned bytesize = 0;
Dwarf_Error err = NULL;
CHECK_DWERR(dwarf_bytesize(m_die, &bytesize, &err), err,
"cannot get DIE byte size");
return bytesize;
}
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;
}
static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
struct perf_probe_arg_field *field,
struct probe_trace_arg_ref **ref_ptr,
Dwarf_Die *die_mem)
{
struct probe_trace_arg_ref *ref = *ref_ptr;
Dwarf_Die type;
Dwarf_Word offs;
int ret, tag;
pr_debug("converting %s in %s\n", field->name, varname);
if (die_get_real_type(vr_die, &type) == NULL) {
pr_warning("Failed to get the type of %s.\n", varname);
return -ENOENT;
}
pr_debug2("Var real type: (%x)\n", (unsigned)dwarf_dieoffset(&type));
tag = dwarf_tag(&type);
if (field->name[0] == '[' &&
(tag == DW_TAG_array_type || tag == DW_TAG_pointer_type)) {
if (field->next)
memcpy(die_mem, &type, sizeof(*die_mem));
if (die_get_real_type(&type, &type) == NULL) {
pr_warning("Failed to get the type of %s.\n", varname);
return -ENOENT;
}
pr_debug2("Array real type: (%x)\n",
(unsigned)dwarf_dieoffset(&type));
if (tag == DW_TAG_pointer_type) {
ref = zalloc(sizeof(struct probe_trace_arg_ref));
if (ref == NULL)
return -ENOMEM;
if (*ref_ptr)
(*ref_ptr)->next = ref;
else
*ref_ptr = ref;
}
ref->offset += dwarf_bytesize(&type) * field->index;
if (!field->next)
memcpy(die_mem, vr_die, sizeof(*die_mem));
goto next;
} else if (tag == DW_TAG_pointer_type) {
if (!field->ref) {
pr_err("Semantic error: %s must be referred by '->'\n",
field->name);
return -EINVAL;
}
if (die_get_real_type(&type, &type) == NULL) {
pr_warning("Failed to get the type of %s.\n", varname);
return -ENOENT;
}
if (dwarf_tag(&type) != DW_TAG_structure_type) {
pr_warning("%s is not a data structure.\n", varname);
return -EINVAL;
}
ref = zalloc(sizeof(struct probe_trace_arg_ref));
if (ref == NULL)
return -ENOMEM;
if (*ref_ptr)
(*ref_ptr)->next = ref;
else
*ref_ptr = ref;
} else {
if (tag != DW_TAG_structure_type) {
pr_warning("%s is not a data structure.\n", varname);
return -EINVAL;
}
if (field->name[0] == '[') {
pr_err("Semantic error: %s is not a pointor"
" nor array.\n", varname);
return -EINVAL;
}
if (field->ref) {
pr_err("Semantic error: %s must be referred by '.'\n",
field->name);
return -EINVAL;
}
if (!ref) {
pr_warning("Structure on a register is not "
"supported yet.\n");
return -ENOTSUP;
}
}
if (die_find_member(&type, field->name, die_mem) == NULL) {
pr_warning("%s(tyep:%s) has no member %s.\n", varname,
dwarf_diename(&type), field->name);
return -EINVAL;
}
ret = die_get_data_member_location(die_mem, &offs);
if (ret < 0) {
pr_warning("Failed to get the offset of %s.\n", field->name);
return ret;
}
ref->offset += (long)offs;
next:
if (field->next)
return convert_variable_fields(die_mem, field->name,
field->next, &ref, die_mem);
else
return 0;
}
static int convert_variable_type(Dwarf_Die *vr_die,
struct probe_trace_arg *tvar,
const char *cast)
{
struct probe_trace_arg_ref **ref_ptr = &tvar->ref;
Dwarf_Die type;
char buf[16];
int bsize, boffs, total;
int ret;
if (cast && strcmp(cast, "string") != 0) {
tvar->type = strdup(cast);
return (tvar->type == NULL) ? -ENOMEM : 0;
}
bsize = dwarf_bitsize(vr_die);
if (bsize > 0) {
boffs = dwarf_bitoffset(vr_die);
total = dwarf_bytesize(vr_die);
if (boffs < 0 || total < 0)
return -ENOENT;
ret = snprintf(buf, 16, "b%d@%d/%zd", bsize, boffs,
BYTES_TO_BITS(total));
goto formatted;
}
if (die_get_real_type(vr_die, &type) == NULL) {
pr_warning("Failed to get a type information of %s.\n",
dwarf_diename(vr_die));
return -ENOENT;
}
pr_debug("%s type is %s.\n",
dwarf_diename(vr_die), dwarf_diename(&type));
if (cast && strcmp(cast, "string") == 0) {
ret = dwarf_tag(&type);
if (ret != DW_TAG_pointer_type &&
ret != DW_TAG_array_type) {
pr_warning("Failed to cast into string: "
"%s(%s) is not a pointer nor array.\n",
dwarf_diename(vr_die), dwarf_diename(&type));
return -EINVAL;
}
if (ret == DW_TAG_pointer_type) {
if (die_get_real_type(&type, &type) == NULL) {
pr_warning("Failed to get a type"
" information.\n");
return -ENOENT;
}
while (*ref_ptr)
ref_ptr = &(*ref_ptr)->next;
*ref_ptr = zalloc(sizeof(struct probe_trace_arg_ref));
if (*ref_ptr == NULL) {
pr_warning("Out of memory error\n");
return -ENOMEM;
}
}
if (!die_compare_name(&type, "char") &&
!die_compare_name(&type, "unsigned char")) {
pr_warning("Failed to cast into string: "
"%s is not (unsigned) char *.\n",
dwarf_diename(vr_die));
return -EINVAL;
}
tvar->type = strdup(cast);
return (tvar->type == NULL) ? -ENOMEM : 0;
}
ret = dwarf_bytesize(&type);
if (ret <= 0)
return 0;
ret = BYTES_TO_BITS(ret);
if (ret > MAX_BASIC_TYPE_BITS) {
pr_info("%s exceeds max-bitwidth. Cut down to %d bits.\n",
dwarf_diename(&type), MAX_BASIC_TYPE_BITS);
ret = MAX_BASIC_TYPE_BITS;
}
ret = snprintf(buf, 16, "%c%d",
die_is_signed_type(&type) ? 's' : 'u', ret);
formatted:
if (ret < 0 || ret >= 16) {
if (ret >= 16)
ret = -E2BIG;
pr_warning("Failed to convert variable type: %s\n",
strerror(-ret));
return ret;
}
tvar->type = strdup(buf);
if (tvar->type == NULL)
return -ENOMEM;
return 0;
}
static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
struct perf_probe_arg_field *field,
struct probe_trace_arg_ref **ref_ptr,
Dwarf_Die *die_mem)
{
struct probe_trace_arg_ref *ref = *ref_ptr;
Dwarf_Die type;
Dwarf_Word offs;
int ret, tag;
pr_debug("converting %s in %s\n", field->name, varname);
if (die_get_real_type(vr_die, &type) == NULL) {
pr_warning("Failed to get the type of %s.\n", varname);
return -ENOENT;
}
pr_debug2("Var real type: (%x)\n", (unsigned)dwarf_dieoffset(&type));
tag = dwarf_tag(&type);
if (field->name[0] == '[' &&
(tag == DW_TAG_array_type || tag == DW_TAG_pointer_type)) {
if (field->next)
/* Save original type for next field */
memcpy(die_mem, &type, sizeof(*die_mem));
/* Get the type of this array */
if (die_get_real_type(&type, &type) == NULL) {
pr_warning("Failed to get the type of %s.\n", varname);
return -ENOENT;
}
pr_debug2("Array real type: (%x)\n",
(unsigned)dwarf_dieoffset(&type));
if (tag == DW_TAG_pointer_type) {
ref = zalloc(sizeof(struct probe_trace_arg_ref));
if (ref == NULL)
return -ENOMEM;
if (*ref_ptr)
(*ref_ptr)->next = ref;
else
*ref_ptr = ref;
}
ref->offset += dwarf_bytesize(&type) * field->index;
if (!field->next)
/* Save vr_die for converting types */
memcpy(die_mem, vr_die, sizeof(*die_mem));
goto next;
} else if (tag == DW_TAG_pointer_type) {
/* Check the pointer and dereference */
if (!field->ref) {
pr_err("Semantic error: %s must be referred by '->'\n",
field->name);
return -EINVAL;
}
/* Get the type pointed by this pointer */
if (die_get_real_type(&type, &type) == NULL) {
pr_warning("Failed to get the type of %s.\n", varname);
return -ENOENT;
}
/* Verify it is a data structure */
tag = dwarf_tag(&type);
if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) {
pr_warning("%s is not a data structure nor an union.\n",
varname);
return -EINVAL;
}
ref = zalloc(sizeof(struct probe_trace_arg_ref));
if (ref == NULL)
return -ENOMEM;
if (*ref_ptr)
(*ref_ptr)->next = ref;
else
*ref_ptr = ref;
} else {
/* Verify it is a data structure */
if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) {
pr_warning("%s is not a data structure nor an union.\n",
varname);
return -EINVAL;
}
if (field->name[0] == '[') {
pr_err("Semantic error: %s is not a pointer"
" nor array.\n", varname);
return -EINVAL;
}
/* While prcessing unnamed field, we don't care about this */
if (field->ref && dwarf_diename(vr_die)) {
pr_err("Semantic error: %s must be referred by '.'\n",
field->name);
return -EINVAL;
}
if (!ref) {
pr_warning("Structure on a register is not "
"supported yet.\n");
return -ENOTSUP;
}
}
if (die_find_member(&type, field->name, die_mem) == NULL) {
pr_warning("%s(type:%s) has no member %s.\n", varname,
dwarf_diename(&type), field->name);
return -EINVAL;
}
/* Get the offset of the field */
if (tag == DW_TAG_union_type) {
offs = 0;
} else {
ret = die_get_data_member_location(die_mem, &offs);
if (ret < 0) {
pr_warning("Failed to get the offset of %s.\n",
field->name);
return ret;
}
}
ref->offset += (long)offs;
/* If this member is unnamed, we need to reuse this field */
if (!dwarf_diename(die_mem))
return convert_variable_fields(die_mem, varname, field,
&ref, die_mem);
next:
/* Converting next field */
if (field->next)
return convert_variable_fields(die_mem, field->name,
field->next, &ref, die_mem);
else
return 0;
}
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;
}
void
handle (Dwarf *dbg, Dwarf_Die *die, int n)
{
Dwarf_Die child;
unsigned int tag;
const char *str;
char buf[30];
const char *name;
Dwarf_Off off;
Dwarf_Off cuoff;
size_t cnt;
Dwarf_Addr addr;
int i;
tag = dwarf_tag (die);
if (tag != DW_TAG_invalid)
{
if (tag < ntagnames)
str = tagnames[tag];
else
{
snprintf (buf, sizeof buf, "%#x", tag);
str = buf;
}
}
else
str = "* NO TAG *";
name = dwarf_diename (die);
if (name == 0)
name = "* NO NAME *";
off = dwarf_dieoffset (die);
cuoff = dwarf_cuoffset (die);
printf ("%*s%s\n", n * 5, "", str);
printf ("%*s Name : %s\n", n * 5, "", name);
printf ("%*s Offset : %lld\n", n * 5, "", (long long int) off);
printf ("%*s CU offset : %lld\n", n * 5, "", (long long int) cuoff);
printf ("%*s Attrs :", n * 5, "");
for (cnt = 0; cnt < nattrs; ++cnt)
if (dwarf_hasattr (die, attrs[cnt].code))
printf (" %s", attrs[cnt].name);
puts ("");
if (dwarf_hasattr (die, DW_AT_low_pc) && dwarf_lowpc (die, &addr) == 0)
{
Dwarf_Attribute attr;
Dwarf_Addr addr2;
printf ("%*s low PC : %#llx\n",
n * 5, "", (unsigned long long int) addr);
if (dwarf_attr (die, DW_AT_low_pc, &attr) == NULL
|| dwarf_formaddr (&attr, &addr2) != 0
|| addr != addr2)
puts ("************* DW_AT_low_pc verify failed ************");
else if (! dwarf_hasform (&attr, DW_FORM_addr))
puts ("************* DW_AT_low_pc form failed ************");
else if (dwarf_whatform (&attr) != DW_FORM_addr)
puts ("************* DW_AT_low_pc form (2) failed ************");
else if (dwarf_whatattr (&attr) != DW_AT_low_pc)
puts ("************* DW_AT_low_pc attr failed ************");
}
if (dwarf_hasattr (die, DW_AT_high_pc) && dwarf_highpc (die, &addr) == 0)
{
Dwarf_Attribute attr;
Dwarf_Addr addr2;
printf ("%*s high PC : %#llx\n",
n * 5, "", (unsigned long long int) addr);
if (dwarf_attr (die, DW_AT_high_pc, &attr) == NULL
|| dwarf_formaddr (&attr, &addr2) != 0
|| addr != addr2)
puts ("************* DW_AT_high_pc verify failed ************");
else if (! dwarf_hasform (&attr, DW_FORM_addr))
puts ("************* DW_AT_high_pc form failed ************");
else if (dwarf_whatform (&attr) != DW_FORM_addr)
puts ("************* DW_AT_high_pc form (2) failed ************");
else if (dwarf_whatattr (&attr) != DW_AT_high_pc)
puts ("************* DW_AT_high_pc attr failed ************");
}
if (dwarf_hasattr (die, DW_AT_byte_size) && (i = dwarf_bytesize (die)) != -1)
{
Dwarf_Attribute attr;
Dwarf_Word u2;
unsigned int u;
printf ("%*s byte size : %d\n", n * 5, "", i);
if (dwarf_attr (die, DW_AT_byte_size, &attr) == NULL
|| dwarf_formudata (&attr, &u2) != 0
|| i != (int) u2)
puts ("************* DW_AT_byte_size verify failed ************");
else if (! dwarf_hasform (&attr, DW_FORM_data1)
&& ! dwarf_hasform (&attr, DW_FORM_data2)
&& ! dwarf_hasform (&attr, DW_FORM_data4)
&& ! dwarf_hasform (&attr, DW_FORM_data8)
&& ! dwarf_hasform (&attr, DW_FORM_sdata)
&& ! dwarf_hasform (&attr, DW_FORM_udata))
puts ("************* DW_AT_byte_size form failed ************");
else if ((u = dwarf_whatform (&attr)) == 0
|| (u != DW_FORM_data1
&& u != DW_FORM_data2
&& u != DW_FORM_data4
&& u != DW_FORM_data8
&& u != DW_FORM_sdata
&& u != DW_FORM_udata))
puts ("************* DW_AT_byte_size form (2) failed ************");
else if (dwarf_whatattr (&attr) != DW_AT_byte_size)
puts ("************* DW_AT_byte_size attr failed ************");
}
if (dwarf_hasattr (die, DW_AT_bit_size) && (i = dwarf_bitsize (die)) != -1)
{
Dwarf_Attribute attr;
Dwarf_Word u2;
unsigned int u;
printf ("%*s bit size : %d\n", n * 5, "", i);
if (dwarf_attr (die, DW_AT_bit_size, &attr) == NULL
|| dwarf_formudata (&attr, &u2) != 0
|| i != (int) u2)
puts ("************* DW_AT_bit_size test failed ************");
else if (! dwarf_hasform (&attr, DW_FORM_data1)
&& ! dwarf_hasform (&attr, DW_FORM_data2)
&& ! dwarf_hasform (&attr, DW_FORM_data4)
&& ! dwarf_hasform (&attr, DW_FORM_data8)
&& ! dwarf_hasform (&attr, DW_FORM_sdata)
&& ! dwarf_hasform (&attr, DW_FORM_udata))
puts ("************* DW_AT_bit_size form failed ************");
else if ((u = dwarf_whatform (&attr)) == 0
|| (u != DW_FORM_data1
&& u != DW_FORM_data2
&& u != DW_FORM_data4
&& u != DW_FORM_data8
&& u != DW_FORM_sdata
&& u != DW_FORM_udata))
puts ("************* DW_AT_bit_size form (2) failed ************");
else if (dwarf_whatattr (&attr) != DW_AT_bit_size)
puts ("************* DW_AT_bit_size attr failed ************");
}
if (dwarf_hasattr (die, DW_AT_bit_offset)
&& (i = dwarf_bitoffset (die)) != -1)
{
Dwarf_Attribute attr;
Dwarf_Word u2;
unsigned int u;
printf ("%*s bit offset: %d\n", n * 5, "", i);
if (dwarf_attr (die, DW_AT_bit_offset, &attr) == NULL
|| dwarf_formudata (&attr, &u2) != 0
|| i != (int) u2)
puts ("************* DW_AT_bit_offset test failed ************");
else if (! dwarf_hasform (&attr, DW_FORM_data1)
&& ! dwarf_hasform (&attr, DW_FORM_data2)
&& ! dwarf_hasform (&attr, DW_FORM_data4)
&& ! dwarf_hasform (&attr, DW_FORM_data8)
&& ! dwarf_hasform (&attr, DW_FORM_sdata)
&& ! dwarf_hasform (&attr, DW_FORM_udata))
puts ("************* DW_AT_bit_offset form failed ************");
else if ((u = dwarf_whatform (&attr)) == 0
|| (u != DW_FORM_data1
&& u != DW_FORM_data2
&& u != DW_FORM_data4
&& u != DW_FORM_data8
&& u != DW_FORM_sdata
&& u != DW_FORM_udata))
puts ("************* DW_AT_bit_offset form (2) failed ************");
else if (dwarf_whatattr (&attr) != DW_AT_bit_offset)
puts ("************* DW_AT_bit_offset attr failed ************");
}
if (dwarf_hasattr (die, DW_AT_language) && (i = dwarf_srclang (die)) != -1)
{
Dwarf_Attribute attr;
Dwarf_Word u2;
unsigned int u;
printf ("%*s language : %d\n", n * 5, "", i);
if (dwarf_attr (die, DW_AT_language, &attr) == NULL
|| dwarf_formudata (&attr, &u2) != 0
|| i != (int) u2)
puts ("************* DW_AT_language test failed ************");
else if (! dwarf_hasform (&attr, DW_FORM_data1)
&& ! dwarf_hasform (&attr, DW_FORM_data2)
&& ! dwarf_hasform (&attr, DW_FORM_data4)
&& ! dwarf_hasform (&attr, DW_FORM_data8)
&& ! dwarf_hasform (&attr, DW_FORM_sdata)
&& ! dwarf_hasform (&attr, DW_FORM_udata))
puts ("************* DW_AT_language form failed ************");
else if ((u = dwarf_whatform (&attr)) == 0
|| (u != DW_FORM_data1
&& u != DW_FORM_data2
&& u != DW_FORM_data4
&& u != DW_FORM_data8
&& u != DW_FORM_sdata
&& u != DW_FORM_udata))
puts ("************* DW_AT_language form (2) failed ************");
else if (dwarf_whatattr (&attr) != DW_AT_language)
puts ("************* DW_AT_language attr failed ************");
}
if (dwarf_hasattr (die, DW_AT_ordering)
&& (i = dwarf_arrayorder (die)) != -1)
{
Dwarf_Attribute attr;
Dwarf_Word u2;
unsigned int u;
printf ("%*s ordering : %d\n", n * 5, "", i);
if (dwarf_attr (die, DW_AT_ordering, &attr) == NULL
|| dwarf_formudata (&attr, &u2) != 0
|| i != (int) u2)
puts ("************* DW_AT_ordering test failed ************");
else if (! dwarf_hasform (&attr, DW_FORM_data1)
&& ! dwarf_hasform (&attr, DW_FORM_data2)
&& ! dwarf_hasform (&attr, DW_FORM_data4)
&& ! dwarf_hasform (&attr, DW_FORM_data8)
&& ! dwarf_hasform (&attr, DW_FORM_sdata)
&& ! dwarf_hasform (&attr, DW_FORM_udata))
puts ("************* DW_AT_ordering failed ************");
else if ((u = dwarf_whatform (&attr)) == 0
|| (u != DW_FORM_data1
&& u != DW_FORM_data2
&& u != DW_FORM_data4
&& u != DW_FORM_data8
&& u != DW_FORM_sdata
&& u != DW_FORM_udata))
puts ("************* DW_AT_ordering form (2) failed ************");
else if (dwarf_whatattr (&attr) != DW_AT_ordering)
puts ("************* DW_AT_ordering attr failed ************");
}
if (dwarf_hasattr (die, DW_AT_comp_dir))
{
Dwarf_Attribute attr;
if (dwarf_attr (die, DW_AT_comp_dir, &attr) == NULL
|| (name = dwarf_formstring (&attr)) == NULL)
puts ("************* DW_AT_comp_dir attr failed ************");
else
printf ("%*s directory : %s\n", n * 5, "", name);
}
if (dwarf_hasattr (die, DW_AT_producer))
{
Dwarf_Attribute attr;
if (dwarf_attr (die, DW_AT_producer, &attr) == NULL
|| (name = dwarf_formstring (&attr)) == NULL)
puts ("************* DW_AT_comp_dir attr failed ************");
else
printf ("%*s producer : %s\n", n * 5, "", name);
}
if (dwarf_haschildren (die) != 0 && dwarf_child (die, &child) == 0)
handle (dbg, &child, n + 1);
if (dwarf_siblingof (die, die) == 0)
handle (dbg, die, n);
}