X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/01810beb59acf79a551d344942f520a8cb304d16..f3971a8d8941bced71760fe7f298a79c234ed6d2:/src/mc/mc_dwarf.c diff --git a/src/mc/mc_dwarf.c b/src/mc/mc_dwarf.c index 6b7959877d..94f05130ba 100644 --- a/src/mc/mc_dwarf.c +++ b/src/mc/mc_dwarf.c @@ -117,6 +117,61 @@ const char* MC_dwarf_tagname(int tag) { } } +/** \brief A class of DWARF tags (DW_TAG_*) + */ +typedef enum mc_tag_class { + mc_tag_unkonwn, + mc_tag_type, + mc_tag_subprogram, + mc_tag_variable, + mc_tag_scope +} mc_tag_class; + +static mc_tag_class MC_dwarg_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_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; + + default: + return mc_tag_unkonwn; + + } +} + #define MC_DW_CLASS_UNKNOWN 0 #define MC_DW_CLASS_ADDRESS 1 // Location in the address space of the program #define MC_DW_CLASS_BLOCK 2 // Arbitrary block of bytes @@ -139,6 +194,7 @@ static int MC_dwarf_form_get_class(int form) { case DW_FORM_block: case DW_FORM_block1: return MC_DW_CLASS_BLOCK; + case DW_FORM_data1: case DW_FORM_data2: case DW_FORM_data4: case DW_FORM_data8: @@ -247,6 +303,31 @@ static dw_location_t MC_dwarf_get_location_list(mc_object_info_t info, Dwarf_Die } } +/** \brief Find the frame base of a given frame + * + * \param ip Instruction pointer + * \param frame + * \param unw_cursor + */ +void* mc_find_frame_base(void* ip, dw_frame_t frame, unw_cursor_t* unw_cursor) { + switch(frame->frame_base->type) { + case e_dw_loclist: + { + int loclist_cursor; + for(loclist_cursor=0; loclist_cursor < xbt_dynar_length(frame->frame_base->location.loclist); loclist_cursor++){ + dw_location_entry_t entry = xbt_dynar_get_as(frame->frame_base->location.loclist, loclist_cursor, dw_location_entry_t); + if((ip >= entry->lowpc) && (ip < entry->highpc)){ + return (void*) MC_dwarf_resolve_location(unw_cursor, entry->location, NULL); + } + } + return NULL; + } + // Not handled: + default: + return NULL; + } +} + /** \brief Get the location expression or location list from an attribute * * Processes direct expressions as well as location lists. @@ -276,6 +357,7 @@ static dw_location_t MC_dwarf_get_location(mc_object_info_t info, Dwarf_Die* die // 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: @@ -481,7 +563,8 @@ static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member, Dwar Dwarf_Attribute attr; dwarf_attr_integrate(child, DW_AT_data_member_location, &attr); - int klass = MC_dwarf_form_get_class(dwarf_whatform(&attr)); + int form = dwarf_whatform(&attr); + int klass = MC_dwarf_form_get_class(form); switch (klass) { case MC_DW_CLASS_EXPRLOC: case MC_DW_CLASS_BLOCK: @@ -521,7 +604,9 @@ static void MC_dwarf_fill_member_location(dw_type_t type, dw_type_t member, Dwar // 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 0x%x (%i) as DW_AT_member_location", klass, klass); + xbt_die( + "Can't handle form class (%i) / form 0x%x as DW_AT_member_location", + klass, form); } } @@ -877,9 +962,7 @@ static void MC_dwarf_handle_subprogram_die(mc_object_info_t info, Dwarf_Die* die frame->start = dwarf_dieoffset(die); - const char* name = MC_dwarf_at_linkage_name(die); - if (name==NULL) - name = MC_dwarf_attr_string(die, DW_AT_name); + const char* name = MC_dwarf_attr_string(die, DW_AT_name); frame->name = xbt_strdup(name); // This is the base address for DWARF addresses. @@ -898,7 +981,7 @@ static void MC_dwarf_handle_subprogram_die(mc_object_info_t info, Dwarf_Die* die MC_dwarf_handle_children(info, die, unit, frame); // Register it: - xbt_dict_set(info->local_variables, frame->name, frame, NULL); + xbt_dynar_push(info->subprograms, &frame); } static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame) { @@ -911,43 +994,33 @@ static void MC_dwarf_handle_children(mc_object_info_t info, Dwarf_Die* die, Dwar static void MC_dwarf_handle_die(mc_object_info_t info, Dwarf_Die* die, Dwarf_Die* unit, dw_frame_t frame) { int tag = dwarf_tag(die); - 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_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: + mc_tag_class klass = MC_dwarg_tag_classify(tag); + switch (klass) { + + // Type: + case mc_tag_type: MC_dwarf_handle_type_die(info, die, unit); break; - case DW_TAG_subprogram: + + // Program: + case mc_tag_subprogram: MC_dwarf_handle_subprogram_die(info, die, unit, frame); return; - // case DW_TAG_formal_parameter: - case DW_TAG_variable: - case DW_TAG_formal_parameter: + + // Variable: + case mc_tag_variable: MC_dwarf_handle_variable_die(info, die, unit, frame); break; - } - // Recursive processing of children DIE: - MC_dwarf_handle_children(info, die, unit, frame); + // Scope: + case mc_tag_scope: + // TODO + break; + + default: + break; + + } } void MC_dwarf_get_variables(mc_object_info_t info) { @@ -964,18 +1037,14 @@ void MC_dwarf_get_variables(mc_object_info_t info) { Dwarf_Off next_offset = 0; size_t length; while (dwarf_nextcu (dwarf, offset, &next_offset, &length, NULL, NULL, NULL) == 0) { - Dwarf_Die die; + Dwarf_Die unit_die; - if(dwarf_offdie(dwarf, offset+length, &die)!=NULL) { - - // Skip C++ for now (we will add support for it soon): - int lang = dwarf_srclang(&die); - if((lang==DW_LANG_C_plus_plus) || (lang==DW_LANG_ObjC_plus_plus)) { - offset = next_offset; - continue; + if(dwarf_offdie(dwarf, offset+length, &unit_die)!=NULL) { + Dwarf_Die child; + int res; + for (res=dwarf_child(&unit_die, &child); res==0; res=dwarf_siblingof(&child,&child)) { + MC_dwarf_handle_die(info, &child, &unit_die, NULL); } - - MC_dwarf_handle_die(info, &die, &die, NULL); } offset = next_offset; }