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debug report live stats after /OPT:REF pass

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This commit is contained in:
Nikita Smith
2026-07-27 14:47:08 -07:00
committed by Ryan Fleury
parent 62328cea3f
commit 1ea9fae835
1 changed files with 46 additions and 27 deletions
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src/linker/lnk.c
+46 -27
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@@ -2740,46 +2740,65 @@ THREAD_POOL_TASK_FUNC(lnk_walk_relocs_and_mark_ref_sections_task)
if (task_id == 0) {
ProfBegin("Remove Unreachable Sections");
typedef struct { U64 vsize; U64 fsize; U64 section_count; } Stat;
enum { Stat_Null, Stat_Code, Stat_Data, Stat_Debug, Stat_Count };
Stat stats[Stat_Count] = {0};
for EachNode(obj_n, LNK_ObjNode, objs.first) {
LNK_Obj *obj = &obj_n->data;
for EachIndex(sect_idx, obj->header.section_count_no_null) {
U32 section_number = sect_idx+1;
if (is_live[obj->input_idx][section_number]) { continue; }
U32 section_number = sect_idx+1;
COFF_SectionHeader *section_header = lnk_coff_section_header_from_section_number(obj, section_number);
obj->section_flags[sect_idx] |= COFF_SectionFlag_LnkRemove;
COFF_SectionFlags section_flags = obj->section_flags[sect_idx];
U64 stat_kind = Stat_Null;
if (section_flags & LNK_SECTION_FLAG_DEBUG) { stat_kind = Stat_Debug; }
else if (section_flags & COFF_SectionFlag_CntCode) { stat_kind = Stat_Code; }
else { stat_kind = Stat_Data; }
if (section_flags & COFF_SectionFlag_CntUninitializedData) {
stats[stat_kind].vsize += section_header->vsize;
} else {
stats[stat_kind].fsize += section_header->fsize;
if ( ! is_live[obj->input_idx][section_number]) {
obj->section_flags[sect_idx] |= COFF_SectionFlag_LnkRemove;
}
stats[stat_kind].section_count += 1;
}
}
if (lnk_get_log_status(LNK_Log_Debug)) {
typedef struct { U64 vsize; U64 fsize; U64 section_count; U64 live_count; U64 live_fsize; U64 live_vsize; } Stat;
enum { Stat_Null, Stat_Code, Stat_Data, Stat_Debug, Stat_Count };
Stat stats[Stat_Count] = {0};
for EachNode(obj_n, LNK_ObjNode, objs.first) {
LNK_Obj *obj = &obj_n->data;
for EachIndex(sect_idx, obj->header.section_count_no_null) {
U32 section_number = sect_idx+1;
COFF_SectionHeader *section_header = lnk_coff_section_header_from_section_number(obj, section_number);
U64 stat_kind = Stat_Null;
if (obj->section_flags[sect_idx] & LNK_SECTION_FLAG_DEBUG) { stat_kind = Stat_Debug; }
else if (obj->section_flags[sect_idx] & COFF_SectionFlag_CntCode) { stat_kind = Stat_Code; }
else { stat_kind = Stat_Data; }
if (is_live[obj->input_idx][section_number]) {
stats[stat_kind].live_count += 1;
if (obj->section_flags[sect_idx] & COFF_SectionFlag_CntUninitializedData) {
stats[stat_kind].live_vsize += section_header->vsize;
} else {
stats[stat_kind].live_fsize += section_header->fsize;
}
} else {
if (obj->section_flags[sect_idx] & COFF_SectionFlag_CntUninitializedData) {
stats[stat_kind].vsize += section_header->vsize;
} else {
stats[stat_kind].fsize += section_header->fsize;
}
stats[stat_kind].section_count += 1;
}
}
}
U64 total_fsize = 0, total_section_count = 0;
U64 total_fsize_live = 0, total_section_count_live = 0;
for EachElement(i, stats) {
total_fsize += stats[i].fsize;
total_section_count += stats[i].section_count;
total_fsize += stats[i].fsize;
total_section_count += stats[i].section_count;
total_fsize_live += stats[i].live_fsize;
total_section_count_live += stats[i].live_count;
}
String8List stat_list = {0};
str8_list_pushf(scratch.arena, &stat_list, "Code : %M, %S sections", stats[Stat_Code].fsize, str8_from_count(scratch.arena, stats[Stat_Code].section_count ));
str8_list_pushf(scratch.arena, &stat_list, "Data : %M, %S sections", stats[Stat_Data].fsize, str8_from_count(scratch.arena, stats[Stat_Data].section_count ));
str8_list_pushf(scratch.arena, &stat_list, "Debug: %M, %S sections", stats[Stat_Debug].fsize, str8_from_count(scratch.arena, stats[Stat_Debug].section_count));
str8_list_pushf(scratch.arena, &stat_list, "Total: %M, %S sections", total_fsize, str8_from_count(scratch.arena, total_section_count));
str8_list_pushf(scratch.arena, &stat_list, "Code : removed %M, %S sections; live %M, %S sections", stats[Stat_Code].fsize, str8_from_count(scratch.arena, stats[Stat_Code].section_count ), stats[Stat_Code].live_fsize, str8_from_count(scratch.arena, stats[Stat_Code].live_count));
str8_list_pushf(scratch.arena, &stat_list, "Data : removed %M, %S sections; live %M, %S sections", stats[Stat_Data].fsize, str8_from_count(scratch.arena, stats[Stat_Data].section_count ), stats[Stat_Data].live_fsize, str8_from_count(scratch.arena, stats[Stat_Data].live_count));
str8_list_pushf(scratch.arena, &stat_list, "Debug: removed %M, %S sections; live %M, %S sections", stats[Stat_Debug].fsize, str8_from_count(scratch.arena, stats[Stat_Debug].section_count), stats[Stat_Debug].live_fsize, str8_from_count(scratch.arena, stats[Stat_Debug].live_count));
str8_list_pushf(scratch.arena, &stat_list, "Total: removed %M, %S sections; live %M, %S sections", total_fsize, str8_from_count(scratch.arena, total_section_count), total_fsize_live, str8_from_count(scratch.arena, total_section_count_live));
String8 stat_str = str8_list_join(scratch.arena, &stat_list, &(StringJoin){.pre = str8_lit(" "), .sep = str8_lit("\n ")});
lnk_log(LNK_Log_Debug, "/OPT:REF Stats:\n%S", stat_str);
}