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make GSI and PSI serialization deterministic

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This commit is contained in:
Nikita Smith
2026-04-06 12:04:33 -07:00
parent 608a0df058
commit aad1805124
2 changed files with 108 additions and 51 deletions
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src/linker/pdb_ext/pdb_builder.c
+104 -41
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@@ -1903,13 +1903,73 @@ THREAD_POOL_TASK_FUNC(gsi_size_buckets_task)
}
}
force_inline int
gsi_symbol_is_before(void *raw_a, void *raw_b)
{
CV_Symbol *a = *(CV_Symbol **)raw_a;
CV_Symbol *b = *(CV_Symbol **)raw_b;
String8 a_name = cv_name_from_symbol(a->kind, a->data);
String8 b_name = cv_name_from_symbol(b->kind, b->data);
int is_before;
if (a_name.size != b_name.size) {
is_before = a_name.size < b_name.size;
} else {
is_before = str8_compar_ignore_case(&a_name, &b_name) < 0;
}
return is_before;
}
internal int
gsi_pub_symbol_is_before(void *raw_a, void *raw_b)
{
CV_Symbol *a = *(CV_Symbol **)raw_a;
CV_Symbol *b = *(CV_Symbol **)raw_b;
String8 a_name = cv_name_from_symbol(a->kind, a->data);
String8 b_name = cv_name_from_symbol(b->kind, b->data);
int is_before;
if (a_name.size != b_name.size) {
is_before = a_name.size < b_name.size;
} else {
int cmp = str8_compar_ignore_case(&a_name, &b_name);
if (cmp == 0) {
CV_SymPub32 *a_sym = (CV_SymPub32 *)a->data.str;
CV_SymPub32 *b_sym = (CV_SymPub32 *)b->data.str;
cmp = u16_compar(&a_sym->sec, &b_sym->sec);
if (cmp == 0) {
cmp = u32_compar(&a_sym->off, &b_sym->off);
}
}
is_before = cmp < 0;
}
return is_before;
}
internal
THREAD_POOL_TASK_FUNC(gsi_serialize_pub32)
{
Temp scratch = scratch_begin(&arena, 1);
U64 bucket_idx = task_id;
PDB_GsiSerializeSymbolsTask *task = raw_task;
CV_SymbolList bucket_list = task->bucket_arr[bucket_idx];
CV_SymbolList bucket = task->bucket_arr[bucket_idx];
CV_Symbol **symbol_arr = push_array(scratch.arena, CV_Symbol *, bucket.count);
{
U64 i = 0;
for EachNode(n, CV_SymbolNode, bucket.first) { symbol_arr[i++] = &n->data; }
}
// sort symbols within bucket
radsort(symbol_arr, bucket.count, gsi_pub_symbol_is_before);
PDB_GsiSortRecord *sort_record_arr = task->sort_record_arr_arr[bucket_idx];
U64 buffer_size = task->bucket_size_arr[bucket_idx];
U64 buffer_base = task->bucket_off_arr[bucket_idx];
@@ -1917,14 +1977,12 @@ THREAD_POOL_TASK_FUNC(gsi_serialize_pub32)
U64 sort_idx = 0;
U64 buffer_cursor = 0;
for EachIndex(i, bucket.count) {
Assert(symbol_arr[i]->kind == CV_SymKind_PUB32);
for (CV_SymbolNode *node = bucket_list.first; node != 0; node = node->next) {
CV_Symbol *symbol = &node->data;
Assert(symbol->kind == CV_SymKind_PUB32);
CV_SymPub32 *pub32 = (CV_SymPub32 *)symbol->data.str;
CV_SymPub32 *pub32 = (CV_SymPub32 *)symbol_arr[i]->data.str;
U8 *str_ptr = (U8 *)(pub32 + 1);
U64 str_size = symbol->data.size - sizeof(*pub32);
U64 str_size = symbol_arr[i]->data.size - sizeof(*pub32);
String8 name = str8(str_ptr, str_size);
// init sort record
@@ -1934,57 +1992,62 @@ THREAD_POOL_TASK_FUNC(gsi_serialize_pub32)
sr->offset = buffer_cursor;
// serialize symbol
U64 serial_size = cv_write_symbol(buffer, buffer_cursor, buffer_size, symbol, task->symbol_align);
U64 serial_size = cv_write_symbol(buffer, buffer_cursor, buffer_size, symbol_arr[i], task->symbol_align);
// advance
sort_idx += 1;
buffer_cursor += serial_size;
}
Assert(sort_idx == bucket_list.count);
Assert(sort_idx == bucket.count);
Assert(buffer_cursor == buffer_size);
// sort symbols by name within bucket
gsi_record_sort_by_name(sort_record_arr, bucket_list.count);
scratch_end(scratch);
}
internal
THREAD_POOL_TASK_FUNC(gsi_serialize_symbols_task)
{
U64 bucket_idx = task_id;
PDB_GsiSerializeSymbolsTask *task = raw_task;
Temp scratch = scratch_begin(&arena, 1);
CV_SymbolList bucket_list = task->bucket_arr[bucket_idx];
PDB_GsiSortRecord *sort_record_arr = task->sort_record_arr_arr[bucket_idx];
U64 buffer_size = task->bucket_size_arr[bucket_idx];
U64 buffer_base = task->bucket_off_arr[bucket_idx];
U8 *buffer = task->buffer + buffer_base;
U64 bucket_idx = task_id;
PDB_GsiSerializeSymbolsTask *task = raw_task;
CV_SymbolList bucket = task->bucket_arr[bucket_idx];
U64 sort_idx = 0;
U64 buffer_cursor = 0;
for (CV_SymbolNode *node = bucket_list.first; node != 0; node = node->next) {
CV_Symbol *symbol = &node->data;
// init sort record
PDB_GsiSortRecord *sr = &sort_record_arr[sort_idx];
//sr->isect_off = isect_off(0,0);
sr->name = cv_name_from_symbol(symbol->kind, symbol->data);
sr->offset = buffer_cursor;
// serialize symbol
U64 serial_size = cv_write_symbol(buffer, buffer_cursor, buffer_size, symbol, task->symbol_align);
// advance
sort_idx += 1;
buffer_cursor += serial_size;
CV_Symbol **symbol_arr = push_array(scratch.arena, CV_Symbol *, bucket.count);
{
U64 i = 0;
for EachNode(n, CV_SymbolNode, bucket.first) { symbol_arr[i++] = &n->data; }
}
Assert(sort_idx == bucket_list.count);
Assert(buffer_cursor == buffer_size);
// sort symbols within bucket
radsort(symbol_arr, bucket.count, gsi_symbol_is_before);
// sort symbols by name within bucket
gsi_record_sort_by_name(sort_record_arr, bucket_list.count);
// symbol -> GSI sort record
{
PDB_GsiSortRecord *sort_record_arr = task->sort_record_arr_arr[bucket_idx];
U64 buffer_size = task->bucket_size_arr[bucket_idx];
U64 buffer_base = task->bucket_off_arr[bucket_idx];
U8 *buffer = task->buffer + buffer_base;
U64 sort_idx = 0;
U64 buffer_cursor = 0;
for EachIndex(i, bucket.count) {
// init sort record
PDB_GsiSortRecord *sr = &sort_record_arr[sort_idx];
sr->name = cv_name_from_symbol(symbol_arr[i]->kind, symbol_arr[i]->data);
sr->offset = buffer_cursor;
sort_idx += 1;
// serialize symbol
U64 serial_size = cv_write_symbol(buffer, buffer_cursor, buffer_size, symbol_arr[i], task->symbol_align);
buffer_cursor += serial_size;
}
Assert(sort_idx == bucket.count);
Assert(buffer_cursor == buffer_size);
}
scratch_end(scratch);
}
internal PDB_GsiBuildResult