*/
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
- *
- * \param expr array of DWARf operations
- * \param len number of elements
- * \return a new MC expression
- */
-static dw_location_t MC_dwarf_get_expression(Dwarf_Op* expr, size_t len);
-
/** \brief Get the DW_TAG_type of the DIE
*
* \param die DIE
return name;
}
-/** \brief Create a location list from a given attribute
- *
- * \param die the DIE
- * \param attr the attribute
- * \return MC specific representation of the location list represented by the given attribute
- * of the given die
- */
-static dw_location_t MC_dwarf_get_location_list(mc_object_info_t info, Dwarf_Die* die, Dwarf_Attribute* attr) {
-
- dw_location_t location = xbt_new0(s_dw_location_t, 1);
- location->type = e_dw_loclist;
- xbt_dynar_t loclist = xbt_dynar_new(sizeof(dw_location_entry_t), NULL);
- location->location.loclist = loclist;
-
- ptrdiff_t offset = 0;
- Dwarf_Addr base, start, end;
- Dwarf_Op *expr;
- size_t len;
-
- while (1) {
-
- offset = dwarf_getlocations(attr, offset, &base, &start, &end, &expr, &len);
- if (offset==0)
- return location;
- else if (offset==-1)
- xbt_die("Error while loading location list");
-
- dw_location_entry_t new_entry = xbt_new0(s_dw_location_entry_t, 1);
-
- void* base = info->flags & MC_OBJECT_INFO_EXECUTABLE ? 0 : MC_object_base_address(info);
-
- new_entry->lowpc = (char*) base + start;
- new_entry->highpc = (char*) base + end;
- new_entry->location = MC_dwarf_get_expression(expr, len);
-
- xbt_dynar_push(loclist, &new_entry);
-
- }
-}
-
-/** \brief Get the location expression or location list from an attribute
- *
- * Processes direct expressions as well as location lists.
- *
- * \param die the DIE
- * \param attr the attribute
- * \return MC specific representation of the location represented by the given attribute
- * of the given die
- */
-static dw_location_t MC_dwarf_get_location(mc_object_info_t info, Dwarf_Die* die, Dwarf_Attribute* attr) {
- int form = dwarf_whatform(attr);
- switch (form) {
-
- // The attribute is an DWARF location expression:
- case DW_FORM_exprloc:
- case DW_FORM_block1: // not in the spec
- case DW_FORM_block2:
- case DW_FORM_block4:
- case DW_FORM_block:
- {
- Dwarf_Op* expr;
- size_t len;
- if (dwarf_getlocation(attr, &expr, &len))
- xbt_die("Could not read location expression");
- return MC_dwarf_get_expression(expr, len);
- }
-
- // 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:
- {
- return MC_dwarf_get_location_list(info, die, attr);
- }
- break;
-
- default:
- xbt_die("Unexpected form %i list for location in attribute %s of <%p>%s",
- form,
- MC_dwarf_attrname(attr->code),
- (void*) dwarf_dieoffset(die),
- MC_dwarf_attr_string(die, DW_AT_name));
- return NULL;
- }
-}
-
-/** \brief Get the location expression or location list from an attribute
- *
- * Processes direct expressions as well as location lists.
- *
- * \param die the DIE
- * \param attribute the attribute code
- * \return MC specific representation of the location represented by the given attribute
- * of the given die
- */
-static dw_location_t MC_dwarf_at_location(mc_object_info_t info, Dwarf_Die* die, int attribute) {
- if(!dwarf_hasattr_integrate(die, attribute))
- return xbt_new0(s_dw_location_t, 1);
-
- Dwarf_Attribute attr;
- dwarf_attr_integrate(die, attribute, &attr);
- return MC_dwarf_get_location(info, die, &attr);
-}
-
static char* MC_dwarf_at_type(Dwarf_Die* die) {
Dwarf_Attribute attr;
if (dwarf_hasattr_integrate(die, DW_AT_type)) {
return result;
}
-// ***** Location
-
-Dwarf_Off MC_dwarf_resolve_location(unw_cursor_t* c, dw_location_t location, void* frame_pointer_address) {
- unw_word_t res;
- switch (location->type){
- case e_dw_compose:
- if (xbt_dynar_length(location->location.compose) > 1){
- return 0; /* TODO : location list with optimizations enabled */
- }
- dw_location_t location_entry = xbt_dynar_get_as(location->location.compose, 0, dw_location_t);
- switch (location_entry->type){
- case e_dw_bregister_op:
- unw_get_reg(c, location_entry->location.breg_op.reg, &res);
- return (Dwarf_Off) ((long)res + location_entry->location.breg_op.offset);
- break;
- case e_dw_fbregister_op:
- if (frame_pointer_address != NULL)
- return (Dwarf_Off)((char *)frame_pointer_address + location_entry->location.fbreg_op);
- else
- return 0;
- default:
- return 0; /* FIXME : implement other cases (with optimizations enabled) */
- }
- break;
- default:
- return 0;
- }
-}
-
// ***** dw_type_t
static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member, Dwarf_Die* child) {
}
}
-/** \brief Convert libdw location expresion elment into native one (or NULL in some cases) */
-static dw_location_t MC_dwarf_get_expression_element(Dwarf_Op* op) {
- dw_location_t element = xbt_new0(s_dw_location_t, 1);
- uint8_t atom = op->atom;
- if (atom >= DW_OP_reg0 && atom<= DW_OP_reg31) {
- element->type = e_dw_register;
- element->location.reg = atom - DW_OP_reg0;
- }
- else if (atom >= DW_OP_breg0 && atom<= DW_OP_breg31) {
- element->type = e_dw_bregister_op;
- element->location.reg = atom - DW_OP_breg0;
- element->location.breg_op.offset = op->number;
- }
- else if (atom >= DW_OP_lit0 && atom<= DW_OP_lit31) {
- element->type = e_dw_lit;
- element->location.reg = atom - DW_OP_lit0;
- }
- else switch (atom) {
- case DW_OP_fbreg:
- element->type = e_dw_fbregister_op;
- element->location.fbreg_op = op->number;
- break;
- case DW_OP_piece:
- element->type = e_dw_piece;
- element->location.piece = op->number;
- break;
- case DW_OP_plus_uconst:
- element->type = e_dw_plus_uconst;
- element->location.plus_uconst = op->number;
- break;
- case DW_OP_abs:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("abs");
- break;
- case DW_OP_and:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("and");
- break;
- case DW_OP_div:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("div");
- break;
- case DW_OP_minus:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("minus");
- break;
- case DW_OP_mod:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("mod");
- break;
- case DW_OP_mul:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("mul");
- break;
- case DW_OP_neg:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("neg");
- break;
- case DW_OP_not:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("not");
- break;
- case DW_OP_or:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("or");
- break;
- case DW_OP_plus:
- element->type = e_dw_arithmetic;
- element->location.arithmetic = xbt_strdup("plus");
- break;
-
- case DW_OP_stack_value:
- // Why nothing here?
- xbt_free(element);
- return NULL;
-
- case DW_OP_deref_size:
- element->type = e_dw_deref;
- element->location.deref_size = (unsigned int short) op->number;
- break;
- case DW_OP_deref:
- element->type = e_dw_deref;
- element->location.deref_size = sizeof(void *);
- break;
- case DW_OP_constu:
- element->type = e_dw_uconstant;
- element->location.uconstant.bytes = 1;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
- case DW_OP_consts:
- element->type = e_dw_sconstant;
- element->location.uconstant.bytes = 1;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
-
- case DW_OP_const1u:
- element->type = e_dw_uconstant;
- element->location.uconstant.bytes = 1;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
- case DW_OP_const2u:
- element->type = e_dw_uconstant;
- element->location.uconstant.bytes = 2;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
- case DW_OP_const4u:
- element->type = e_dw_uconstant;
- element->location.uconstant.bytes = 4;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
- case DW_OP_const8u:
- element->type = e_dw_uconstant;
- element->location.uconstant.bytes = 8;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
-
- case DW_OP_const1s:
- element->type = e_dw_sconstant;
- element->location.uconstant.bytes = 1;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
- case DW_OP_const2s:
- element->type = e_dw_sconstant;
- element->location.uconstant.bytes = 2;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
- case DW_OP_const4s:
- element->type = e_dw_sconstant;
- element->location.uconstant.bytes = 4;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
- case DW_OP_const8s:
- element->type = e_dw_sconstant;
- element->location.uconstant.bytes = 8;
- element->location.uconstant.value = (unsigned long int) op->number;
- break;
- default:
- element->type = e_dw_unsupported;
- break;
- }
- return element;
-}
-
-/** \brief Convert libdw location expresion into native one */
-static dw_location_t MC_dwarf_get_expression(Dwarf_Op* expr, size_t len) {
- dw_location_t loc = xbt_new0(s_dw_location_t, 1);
- loc->type = e_dw_compose;
- loc->location.compose = xbt_dynar_new(sizeof(dw_location_t), NULL);
-
- int i;
- for (i=0; i!=len; ++i) {
- dw_location_t element = MC_dwarf_get_expression_element(expr+i);
- if (element)
- xbt_dynar_push(loc->location.compose, &element);
- }
-
- return loc;
-}
-
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) {
/************************** Free functions *************************/
-static void dw_location_free(dw_location_t l){
- if(l){
- if(l->type == e_dw_loclist)
- xbt_dynar_free(&(l->location.loclist));
- else if(l->type == e_dw_compose)
- xbt_dynar_free(&(l->location.compose));
- else if(l->type == e_dw_arithmetic)
- xbt_free(l->location.arithmetic);
-
- xbt_free(l);
- }
-}
-
-static void dw_location_entry_free(dw_location_entry_t e){
- dw_location_free(e->location);
- xbt_free(e);
-}
-
void dw_type_free(dw_type_t t){
xbt_free(t->name);
xbt_free(t->dw_type_id);
/*************************************************************************/
-static dw_location_t MC_dwarf_get_location(xbt_dict_t location_list, char *expr){
-
- dw_location_t loc = xbt_new0(s_dw_location_t, 1);
-
- if(location_list != NULL){
-
- char *key = bprintf("%lu", strtoul(expr, NULL, 16));
- loc->type = e_dw_loclist;
- loc->location.loclist = (xbt_dynar_t)xbt_dict_get_or_null(location_list, key);
- if(loc->location.loclist == NULL)
- XBT_INFO("Key not found in loclist");
- xbt_free(key);
- return loc;
-
- }else{
-
- int cursor = 0;
- char *tok = NULL, *tok2 = NULL;
-
- xbt_dynar_t tokens1 = xbt_str_split(expr, ";");
- xbt_dynar_t tokens2;
-
- loc->type = e_dw_compose;
- loc->location.compose = xbt_dynar_new(sizeof(dw_location_t), NULL);
-
- while(cursor < xbt_dynar_length(tokens1)){
-
- tok = xbt_dynar_get_as(tokens1, cursor, char*);
- tokens2 = xbt_str_split(tok, " ");
- tok2 = xbt_dynar_get_as(tokens2, 0, char*);
-
- if(strncmp(tok2, "DW_OP_reg", 9) == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_register;
- new_element->location.reg = atoi(strtok(tok2, "DW_OP_reg"));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok2, "DW_OP_fbreg:") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_fbregister_op;
- new_element->location.fbreg_op = atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char*));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strncmp(tok2, "DW_OP_breg", 10) == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_bregister_op;
- new_element->location.breg_op.reg = atoi(strtok(tok2, "DW_OP_breg"));
- new_element->location.breg_op.offset = atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char*));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strncmp(tok2, "DW_OP_lit", 9) == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_lit;
- new_element->location.lit = atoi(strtok(tok2, "DW_OP_lit"));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok2, "DW_OP_piece:") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_piece;
- new_element->location.piece = atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char*));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok2, "DW_OP_plus_uconst:") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_plus_uconst;
- new_element->location.plus_uconst = atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char *));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok, "DW_OP_abs") == 0 ||
- strcmp(tok, "DW_OP_and") == 0 ||
- strcmp(tok, "DW_OP_div") == 0 ||
- strcmp(tok, "DW_OP_minus") == 0 ||
- strcmp(tok, "DW_OP_mod") == 0 ||
- strcmp(tok, "DW_OP_mul") == 0 ||
- strcmp(tok, "DW_OP_neg") == 0 ||
- strcmp(tok, "DW_OP_not") == 0 ||
- strcmp(tok, "DW_OP_or") == 0 ||
- strcmp(tok, "DW_OP_plus") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_arithmetic;
- new_element->location.arithmetic = strdup(strtok(tok2, "DW_OP_"));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok, "DW_OP_stack_value") == 0){
- }else if(strcmp(tok2, "DW_OP_deref_size:") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_deref;
- new_element->location.deref_size = (unsigned int short) atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char*));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok, "DW_OP_deref") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_deref;
- new_element->location.deref_size = sizeof(void *);
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok2, "DW_OP_constu:") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_uconstant;
- new_element->location.uconstant.bytes = 1;
- new_element->location.uconstant.value = (unsigned long int)(atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char*)));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok2, "DW_OP_consts:") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_sconstant;
- new_element->location.sconstant.bytes = 1;
- new_element->location.sconstant.value = (long int)(atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char*)));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok2, "DW_OP_const1u:") == 0 ||
- strcmp(tok2, "DW_OP_const2u:") == 0 ||
- strcmp(tok2, "DW_OP_const4u:") == 0 ||
- strcmp(tok2, "DW_OP_const8u:") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_uconstant;
- new_element->location.uconstant.bytes = tok2[11] - '0';
- new_element->location.uconstant.value = (unsigned long int)(atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char*)));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else if(strcmp(tok, "DW_OP_const1s") == 0 ||
- strcmp(tok, "DW_OP_const2s") == 0 ||
- strcmp(tok, "DW_OP_const4s") == 0 ||
- strcmp(tok, "DW_OP_const8s") == 0){
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_sconstant;
- new_element->location.sconstant.bytes = tok2[11] - '0';
- new_element->location.sconstant.value = (long int)(atoi(xbt_dynar_get_as(tokens2, xbt_dynar_length(tokens2) - 1, char*)));
- xbt_dynar_push(loc->location.compose, &new_element);
- }else{
- dw_location_t new_element = xbt_new0(s_dw_location_t, 1);
- new_element->type = e_dw_unsupported;
- xbt_dynar_push(loc->location.compose, &new_element);
- }
-
- cursor++;
- xbt_dynar_free(&tokens2);
-
- }
-
- xbt_dynar_free(&tokens1);
-
- return loc;
-
- }
-
-}
-
/** \brief Finds a frame (DW_TAG_subprogram) from an DWARF offset in the rangd of this subprogram
*
* The offset can be an offset of a child DW_TAG_variable.
void mc_dwarf_location_list_init_from_expression(mc_location_list_t target, size_t len, Dwarf_Op* ops);
void mc_dwarf_location_list_init(mc_location_list_t target, mc_object_info_t info, Dwarf_Die* die, Dwarf_Attribute* attr);
-// ***** Deprecated locations:
-
-typedef enum {
- e_dw_loclist,
- e_dw_register,
- e_dw_bregister_op,
- e_dw_lit,
- e_dw_fbregister_op,
- e_dw_piece,
- e_dw_arithmetic,
- e_dw_plus_uconst,
- e_dw_compose,
- e_dw_deref,
- e_dw_uconstant,
- e_dw_sconstant,
- e_dw_unsupported
-} e_dw_location_type;
-
-typedef struct s_dw_location{
- e_dw_location_type type;
- union{
-
- xbt_dynar_t loclist;
-
- int reg;
-
- struct{
- unsigned int reg;
- int offset;
- }breg_op;
-
- unsigned int lit;
-
- int fbreg_op;
-
- int piece;
-
- unsigned short int deref_size;
-
- xbt_dynar_t compose;
-
- char *arithmetic;
-
- struct{
- int bytes;
- long unsigned int value;
- }uconstant;
-
- struct{
- int bytes;
- long signed int value;
- }sconstant;
-
- unsigned int plus_uconst;
-
- }location;
-}s_dw_location_t, *dw_location_t;
-
-typedef struct s_dw_location_entry{
- void* lowpc;
- void* highpc;
- dw_location_t location;
-}s_dw_location_entry_t, *dw_location_entry_t;
-
// ***** Variables and functions
typedef struct s_dw_variable{
/********************************** DWARF **********************************/
-Dwarf_Off MC_dwarf_resolve_location(unw_cursor_t* c, dw_location_t location, void* frame_pointer_address);
-
#define MC_EXPRESSION_STACK_SIZE 64
#define MC_EXPRESSION_OK 0