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WIP stripped PDB

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Nikita Smith committed 2026-04-10 17:02:04 -07:00
1 parent b4bbc38ab2
commit 89a5acba2c
7 files changed
+152 -40
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src/linker/lnk_debug_info.c
+50 -38
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@@ -2046,30 +2046,33 @@ lnk_write_debug_s_to_pdb_module(PDB_DbiModule *mod, CV_DebugS debug_s, String8No
mod->c13_data_size = 0;
mod->globrefs_size = 0;
// signature
U64 sig_size = str8_buffer_write_u32(buf, buf_pos, CV_Signature_C13);
mod->sym_data_size += sig_size;
mod_cursor += sig_size;
// write symbols
String8List symbols = cv_sub_section_from_debug_s(debug_s, CV_C13SubSectionKind_Symbols);
U64 scope_depth = 0;
for EachNode(n, String8Node, symbols.first) {
for (U64 cursor = 0; cursor + sizeof(CV_SymbolHeader) <= n->string.size; ) {
CV_Symbol symbol = {0};
TryReadBreak(cv_read_symbol(n->string, cursor, CV_SymbolAlign, &symbol), cursor);
if (symbol.kind == CV_SymKind_SKIP) { continue; }
if (cv_is_global_symbol(symbol.kind)) { continue; }
else if (cv_is_typedef(symbol.kind) && scope_depth == 0) { continue; }
else if (symbol.kind == 0x1176) { continue; }
if (symbols.total_size) {
// signature
U64 sig_size = str8_buffer_write_u32(buf, buf_pos, CV_Signature_C13);
mod->sym_data_size += sig_size;
mod_cursor += sig_size;
if (cv_is_scope_symbol(symbol.kind)) { scope_depth += 1; }
else if (cv_is_end_symbol(symbol.kind)) { scope_depth -= 1; }
// write symbols
U64 scope_depth = 0;
for EachNode(n, String8Node, symbols.first) {
for (U64 cursor = 0; cursor + sizeof(CV_SymbolHeader) <= n->string.size; ) {
CV_Symbol symbol = {0};
TryReadBreak(cv_read_symbol(n->string, cursor, CV_SymbolAlign, &symbol), cursor);
if (symbol.kind == CV_SymKind_SKIP) { continue; }
U64 symbol_size = cv_write_symbol_buf(buf, buf_pos, &symbol, PDB_SYMBOL_ALIGN);
mod_cursor += symbol_size;
mod->sym_data_size += symbol_size;
if (cv_is_global_symbol(symbol.kind)) { continue; }
else if (cv_is_typedef(symbol.kind) && scope_depth == 0) { continue; }
else if (symbol.kind == 0x1176) { continue; }
if (cv_is_scope_symbol(symbol.kind)) { scope_depth += 1; }
else if (cv_is_end_symbol(symbol.kind)) { scope_depth -= 1; }
U64 symbol_size = cv_write_symbol_buf(buf, buf_pos, &symbol, PDB_SYMBOL_ALIGN);
mod_cursor += symbol_size;
mod->sym_data_size += symbol_size;
}
}
}
@@ -2112,10 +2115,12 @@ lnk_write_debug_s_to_pdb_module(PDB_DbiModule *mod, CV_DebugS debug_s, String8No
}
// write global refs
String8List globrefs = cv_sub_section_from_debug_s(debug_s, CV_C13SubSectionKind_GlobalRefs);
mod->globrefs_size += str8_buffer_write_u32(buf, buf_pos, safe_cast_u32(globrefs.total_size));
mod->globrefs_size += str8_buffer_write_string_list(buf, buf_pos, globrefs);
mod_cursor += mod->globrefs_size;
if (mod->sym_data_size) {
String8List globrefs = cv_sub_section_from_debug_s(debug_s, CV_C13SubSectionKind_GlobalRefs);
mod->globrefs_size += str8_buffer_write_u32(buf, buf_pos, safe_cast_u32(globrefs.total_size));
mod->globrefs_size += str8_buffer_write_string_list(buf, buf_pos, globrefs);
mod_cursor += mod->globrefs_size;
}
return mod_cursor;
}
@@ -2153,6 +2158,9 @@ THREAD_POOL_TASK_FUNC(lnk_write_pdb_modules)
U64 obj_idx = obj_indices.v[i];
PDB_DbiModule *mod = task->mod_arr[obj_idx];
if (mod->sn == MSF_INVALID_STREAM_NUMBER) { continue; }
CV_DebugS debug_s = task->cv->debug_s_arr[obj_idx];
String8List mod_data = msf_data_from_sn(temp.arena, task->pdb->msf, mod->sn);
@@ -2162,10 +2170,12 @@ THREAD_POOL_TASK_FUNC(lnk_write_pdb_modules)
lnk_write_debug_s_to_pdb_module(mod, debug_s, &buf, &pos);
// sub range symbol data pages and patch symbol tree offsets
Rng1U64 sym_data_range = r1u64(sizeof(CV_Signature), mod->sym_data_size);
String8List mod_symbols = str8_list_substr(temp.arena, mod_data, sym_data_range);
Assert(mod_symbols.total_size == dim_1u64(sym_data_range));
cv_patch_symbol_tree_offsets(mod_symbols, sizeof(CV_Signature), PDB_SYMBOL_ALIGN);
if (mod->sym_data_size) {
Rng1U64 sym_data_range = r1u64(sizeof(CV_Signature), mod->sym_data_size);
String8List mod_symbols = str8_list_substr(temp.arena, mod_data, sym_data_range);
Assert(mod_symbols.total_size == dim_1u64(sym_data_range));
cv_patch_symbol_tree_offsets(mod_symbols, sizeof(CV_Signature), PDB_SYMBOL_ALIGN);
}
}
temp_end(temp);
@@ -2204,11 +2214,14 @@ THREAD_POOL_TASK_FUNC(lnk_write_pdb_modules)
for EachIndex(i, obj_indices.count) {
Temp temp = temp_begin(scratch.arena);
U64 obj_idx = obj_indices.v[i];
PDB_DbiModule *mod = task->mod_arr[obj_idx];
String8List mod_data = msf_data_from_sn(temp.arena, task->pdb->msf, mod->sn);
Rng1U64 c13_data_range = r1u64(mod->sym_data_size + mod->c11_data_size, mod->sym_data_size + mod->c11_data_size + mod->c13_data_size);
String8List c13_data = str8_list_substr(temp.arena, mod_data, c13_data_range);
U64 obj_idx = obj_indices.v[i];
PDB_DbiModule *mod = task->mod_arr[obj_idx];
if (mod->sn == MSF_INVALID_STREAM_NUMBER) { continue; }
String8List mod_data = msf_data_from_sn(temp.arena, task->pdb->msf, mod->sn);
Rng1U64 c13_data_range = r1u64(mod->sym_data_size + mod->c11_data_size, mod->sym_data_size + mod->c11_data_size + mod->c13_data_size);
String8List c13_data = str8_list_substr(temp.arena, mod_data, c13_data_range);
CV_DebugS debug_s = task->cv->debug_s_arr[obj_idx];
String8 string_table = cv_string_table_from_debug_s(debug_s);
@@ -2359,9 +2372,11 @@ lnk_build_pdb(TP_Context *tp, TP_Arena *tp_arena, String8 image_data, LNK_Config
.image_section_virt_ranges.v = push_array(scratch.arena, Rng1U64, task.image_section_table_count),
.image_section_file_ranges.v = push_array(scratch.arena, Rng1U64, task.image_section_table_count),
};
// set min type indices
for EachElement(ti_source, cv_types.min_type_indices) { task.pdb->type_servers[ti_source]->ti_lo = cv_types.min_type_indices[ti_source]; }
// per worker obj indices
{
U64 objs_per_worker = CeilIntegerDiv(cv->obj_count, tp->worker_count);
task.obj_indices = push_array(scratch.arena, U32Array, tp->worker_count);
@@ -2372,10 +2387,7 @@ lnk_build_pdb(TP_Context *tp, TP_Arena *tp_arena, String8 image_data, LNK_Config
}
}
// move patched type data
//
// leaf data is stored in g_file_arena which has linker's life-time
// and this way we skip redundant leaf copy to the type server to make things faster
// push types
pdb_type_server_push_parallel(tp, task.pdb->type_servers[CV_TypeIndexSource_IPI], cv_types.count[CV_TypeIndexSource_IPI], cv_types.v[CV_TypeIndexSource_IPI]);
pdb_type_server_push_parallel(tp, task.pdb->type_servers[CV_TypeIndexSource_TPI], cv_types.count[CV_TypeIndexSource_TPI], cv_types.v[CV_TypeIndexSource_TPI]);
@@ -2453,7 +2465,7 @@ lnk_build_pdb(TP_Context *tp, TP_Arena *tp_arena, String8 image_data, LNK_Config
}
ProfEnd();
pdb_build(tp, tp_arena, task.pdb, task.string_ht, 0);
pdb_build(tp, tp_arena, task.pdb, task.string_ht, 0, cv->is_stripped);
MSF_Error msf_err = msf_build(task.pdb->msf);
if (msf_err != MSF_Error_OK) {