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pre-parse section names and flag debug info sections

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This commit is contained in:
Nikita Smith
2025-09-16 10:31:02 -07:00
committed by Ryan Fleury
parent 3224c5e0aa
commit 80967fac12
5 changed files with 59 additions and 64 deletions
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src/linker/lnk_obj.c
+31 -30
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@@ -259,6 +259,19 @@ THREAD_POOL_TASK_FUNC(lnk_obj_initer)
}
}
}
//
// mark debug info sections
//
{
for EachIndex(sect_idx, header.section_count_no_null) {
COFF_SectionHeader *sect_header = &coff_section_table[sect_idx];
String8 sect_name = str8_cstring_capped(sect_header->name, sect_header->name + sizeof(sect_header->name));
if (str8_starts_with(sect_name, str8_lit(".debug$"))) {
sect_header->flags |= LNK_SECTION_FLAG_DEBUG_INFO;
}
}
}
B8 hotpatch = 0;
if (header.machine == COFF_MachineType_X64) {
@@ -271,25 +284,27 @@ THREAD_POOL_TASK_FUNC(lnk_obj_initer)
Temp scratch = scratch_begin(&arena, 1);
CV_Symbol comp_symbol = {0};
for (U64 sect_idx = 0; sect_idx < header.section_count_no_null; sect_idx += 1) {
for EachIndex(sect_idx, header.section_count_no_null) {
COFF_SectionHeader *sect_header = &coff_section_table[sect_idx];
String8 name = str8_cstring_capped(sect_header->name, sect_header->name+sizeof(sect_header->name));
if (str8_match(name, str8_lit(".debug$S"), 0)) {
Temp temp = temp_begin(scratch.arena);
String8 debug_s_data = str8_substr(input->data, rng_1u64(sect_header->foff, sect_header->foff+sect_header->fsize));
CV_DebugS debug_s = cv_parse_debug_s(temp.arena, debug_s_data);
for (String8Node *symbols_n = debug_s.data_list[CV_C13SubSectionIdxKind_Symbols].first; symbols_n != 0; symbols_n = symbols_n->next) {
CV_SymbolList symbol_list = {0};
cv_parse_symbol_sub_section_capped(scratch.arena, &symbol_list, 0, symbols_n->string, CV_SymbolAlign, 2);
if (symbol_list.first->data.kind == CV_SymKind_COMPILE3) {
comp_symbol = symbol_list.first->data;
goto found_comp_symbol;
} else if (symbol_list.last->data.kind == CV_SymKind_COMPILE3) {
comp_symbol = symbol_list.last->data;
goto found_comp_symbol;
if (sect_header->flags & LNK_SECTION_FLAG_DEBUG_INFO) {
String8 name = str8_cstring_capped(sect_header->name, sect_header->name+sizeof(sect_header->name));
if (str8_match(name, str8_lit(".debug$S"), 0)) {
Temp temp = temp_begin(scratch.arena);
String8 debug_s_data = str8_substr(input->data, rng_1u64(sect_header->foff, sect_header->foff+sect_header->fsize));
CV_DebugS debug_s = cv_parse_debug_s(temp.arena, debug_s_data);
for EachNode(symbols_n, String8Node, debug_s.data_list[CV_C13SubSectionIdxKind_Symbols].first) {
CV_SymbolList symbol_list = {0};
cv_parse_symbol_sub_section_capped(scratch.arena, &symbol_list, 0, symbols_n->string, CV_SymbolAlign, 2);
if (symbol_list.first->data.kind == CV_SymKind_COMPILE3) {
comp_symbol = symbol_list.first->data;
goto found_comp_symbol;
} else if (symbol_list.last->data.kind == CV_SymKind_COMPILE3) {
comp_symbol = symbol_list.last->data;
goto found_comp_symbol;
}
}
temp_end(temp);
}
temp_end(temp);
}
}
found_comp_symbol:;
@@ -556,20 +571,6 @@ lnk_try_comdat_props_from_section_number(LNK_Obj *obj, U32 section_number, COFF_
return 0;
}
internal B32
lnk_is_coff_section_debug(LNK_Obj *obj, U64 sect_idx)
{
String8 string_table = str8_substr(obj->data, obj->header.string_table_range);
COFF_SectionHeader *section_header = lnk_coff_section_header_from_section_number(obj, sect_idx+1);
String8 full_name = coff_name_from_section_header(string_table, section_header);
String8 name, postfix;
coff_parse_section_name(full_name, &name, &postfix);
B32 is_debug = str8_match(name, str8_lit(".debug"), 0);
return is_debug;
}
internal COFF_ParsedSymbol
lnk_parsed_symbol_from_coff_symbol_idx(LNK_Obj *obj, U64 symbol_idx)
{