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detect variable length array in upper bound and lower bound

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This commit is contained in:
Nikita Smith
2026-02-05 17:43:19 -08:00
parent 2071e31f29
commit 82169462a4
6 changed files with 87 additions and 20 deletions
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src/dwarf/dwarf.c
+19
View File
@@ -256,6 +256,25 @@ dw_are_attrib_class_and_form_kind_compatible(DW_Version ver, DW_AttribClass attr
return are_compat;
}
internal B32
dw_is_form_kind_ref(DW_Version ver, DW_Ext ext, DW_FormKind form_kind)
{
B32 is_ref = 0;
if (form_kind == DW_Form_RefAddr ||
form_kind == DW_Form_Ref1 ||
form_kind == DW_Form_Ref2 ||
form_kind == DW_Form_Ref4 ||
form_kind == DW_Form_Ref8 ||
form_kind == DW_Form_RefUData) {
is_ref = 1;
} else {
if (ext == DW_Ext_GNU) {
is_ref = DW_Form_GNU_RefAlt;
}
}
return is_ref;
}
internal String8
dw_name_string_from_section_kind(DW_SectionKind k)
{
src/dwarf/dwarf.h
+2
View File
@@ -1724,6 +1724,8 @@ internal DW_AttribClass dw_attrib_class_from_form_kind(DW_Version ver, DW_FormKi
internal B32 dw_are_attrib_class_and_form_kind_compatible(DW_Version ver, DW_AttribClass attrib_class, DW_FormKind form_kind);
internal B32 dw_is_form_kind_ref(DW_Version ver, DW_Ext ext, DW_FormKind form_kind);
//- Section Names
internal String8 dw_name_string_from_section_kind (DW_SectionKind k);
src/dwarf/dwarf_parse.c
+19 -3
View File
@@ -1139,7 +1139,7 @@ dw_interp_ref(DW_Input *input, DW_CompUnit *cu, DW_FormKind form_kind, DW_Form f
form_kind == DW_Form_Ref4 || form_kind == DW_Form_Ref8 ||
form_kind == DW_Form_RefUData) {
ref.cu = cu;
ref.info_off = form.ref;
ref.info_off = cu->info_range.min + form.ref;
} else if (form_kind == DW_Form_RefAddr) {
NotImplemented;
} else if (form_kind == DW_Form_RefSig8) {
@@ -1987,7 +1987,7 @@ dw_u64_from_attrib(DW_Input *input, DW_CompUnit *cu, DW_Tag tag, DW_AttribKind k
if (attrib_class == DW_AttribClass_Const || attrib_class == DW_AttribClass_Block) {
if (dw_tag_has_attrib(input, cu, tag, DW_AttribKind_Type)) {
Temp scratch = scratch_begin(0,0);
DW_Reference type_ref = dw_ref_from_tag_attrib_kind(input, cu, tag, DW_AttribKind_Type);
DW_Reference type_ref = dw_ref_from_tag_attrib_kind(input, cu, tag, DW_AttribKind_Type);
DW_Tag type_tag = {0};
dw_read_tag_cu(scratch.arena, input, type_ref.cu, type_ref.info_off, &type_tag);
U64 type_byte_size = dw_byte_size_from_tag(input, cu, type_tag);
@@ -2009,6 +2009,22 @@ dw_u64_from_attrib(DW_Input *input, DW_CompUnit *cu, DW_Tag tag, DW_AttribKind k
return result;
}
internal B32
dw_is_attrib_var_ref(DW_Input *input, DW_CompUnit *cu, DW_Attrib *attrib)
{
B32 is_var_ref = 0;
if (dw_is_form_kind_ref(cu->version, cu->ext, attrib->form_kind)) {
Temp scratch = scratch_begin(0,0);
DW_Reference ref = dw_ref_from_attrib(input, cu, attrib);
DW_Tag ref_tag = {0};
if (dw_read_tag_cu(scratch.arena, input, ref.cu, ref.info_off, &ref_tag)) {
is_var_ref = ref_tag.kind == DW_TagKind_Variable;
}
scratch_end(scratch);
}
return is_var_ref;
}
internal DW_CompUnit
dw_cu_from_info_off(Arena *arena, DW_Input *input, DW_ListUnitInput lu_input, U64 offset, B32 relaxed)
{
@@ -2164,7 +2180,7 @@ dw_cu_from_info_off(Arena *arena, DW_Input *input, DW_ListUnitInput lu_input, U6
cu.address_size = address_size;
cu.abbrev_off = abbrev_base;
cu.info_range = range;
cu.first_tag_info_off = range.min + cursor;
cu.first_tag_info_off = cursor;
cu.abbrev_table = abbrev_table;
cu.abbrev_data = abbrev_data;
cu.addr_lu = addr_lu;
src/dwarf/dwarf_parse.h
+3 -1
View File
@@ -317,7 +317,7 @@ typedef struct DW_PubStringsTable
typedef struct DW_Reference
{
DW_CompUnit *cu;
U64 info_off;
U64 info_off; // global .debug_info offset
} DW_Reference;
////////////////////////////////
@@ -521,6 +521,8 @@ internal DW_Reference dw_ref_from_tag_attrib_kind (DW_Input *input, DW_Co
internal DW_LocList dw_loclist_from_tag_attrib_kind (Arena *arena, DW_Input *input, DW_CompUnit *cu, DW_Tag tag, DW_AttribKind kind);
internal Rng1U64List dw_rnglist_from_tag_attrib_kind (Arena *arena, DW_Input *input, DW_CompUnit *cu, DW_Tag tag, DW_AttribKind kind);
internal B32 dw_is_attrib_var_ref(DW_Input *input, DW_CompUnit *cu, DW_Attrib *attrib);
// compile unit
internal DW_CompUnit dw_cu_from_info_off(Arena *arena, DW_Input *input, DW_ListUnitInput lu_input, U64 offset, B32 relaxed);