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raddbg_from_pdb: greatly improve speed of line info combining pass; do not linearly scan for line numbers, use line as hash -> slot key and search only slots

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This commit is contained in:
Ryan Fleury
2024-02-09 15:31:24 -08:00
parent 44d9b57eb5
commit 6c872566af
2 changed files with 18 additions and 10 deletions
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src/raddbg_cons/raddbg_cons.c
+16 -9
View File
@@ -2435,6 +2435,8 @@ cons__source_combine_lines(Arena *arena, CONS__LineMapFragment *first){
// gather line number map
CONS__SrcLineMapBucket *first_bucket = 0;
CONS__SrcLineMapBucket *last_bucket = 0;
U64 line_hash_slots_count = 1024;
CONS__SrcLineMapBucket **line_hash_slots = push_array(scratch.arena, CONS__SrcLineMapBucket *, line_hash_slots_count);
U64 line_count = 0;
U64 voff_count = 0;
U64 max_line_num = 0;
@@ -2442,7 +2444,8 @@ cons__source_combine_lines(Arena *arena, CONS__LineMapFragment *first){
{
for (CONS__LineMapFragment *map_fragment = first;
map_fragment != 0;
map_fragment = map_fragment->next){
map_fragment = map_fragment->next)
{
CONS_LineSequence *sequence = &map_fragment->sequence->line_seq;
U64 *seq_voffs = sequence->voffs;
@@ -2451,6 +2454,7 @@ cons__source_combine_lines(Arena *arena, CONS__LineMapFragment *first){
for (U64 i = 0; i < seq_line_count; i += 1){
U32 line_num = seq_line_nums[i];
U64 voff = seq_voffs[i];
U64 line_hash_slot_idx = line_num%line_hash_slots_count;
// update unique voff counter & max line number
voff_count += 1;
@@ -2458,19 +2462,22 @@ cons__source_combine_lines(Arena *arena, CONS__LineMapFragment *first){
// find match
CONS__SrcLineMapBucket *match = 0;
for (CONS__SrcLineMapBucket *node = first_bucket;
node != 0;
node = node->next){
if (node->line_num == line_num){
match = node;
break;
{
for (CONS__SrcLineMapBucket *node = line_hash_slots[line_hash_slot_idx];
node != 0;
node = node->hash_next){
if (node->line_num == line_num){
match = node;
break;
}
}
}
// introduce new line if no match
if (match == 0){
match = push_array(scratch.arena, CONS__SrcLineMapBucket, 1);
SLLQueuePush(first_bucket, last_bucket, match);
SLLQueuePush_N(first_bucket, last_bucket, match, order_next);
SLLStackPush_N(line_hash_slots[line_hash_slot_idx], match, hash_next);
match->line_num = line_num;
line_count += 1;
}
@@ -2493,7 +2500,7 @@ cons__source_combine_lines(Arena *arena, CONS__LineMapFragment *first){
CONS__SortKey *key_ptr = keys;
for (CONS__SrcLineMapBucket *node = first_bucket;
node != 0;
node = node->next, key_ptr += 1){
node = node->order_next, key_ptr += 1){
key_ptr->key = node->line_num;
key_ptr->val = node;
}
src/raddbg_cons/raddbg_cons.h
+2 -1
View File
@@ -801,7 +801,8 @@ typedef struct CONS__SrcLineMapVoffBlock{
} CONS__SrcLineMapVoffBlock;
typedef struct CONS__SrcLineMapBucket{
struct CONS__SrcLineMapBucket *next;
struct CONS__SrcLineMapBucket *order_next;
struct CONS__SrcLineMapBucket *hash_next;
U32 line_num;
CONS__SrcLineMapVoffBlock *first_voff_block;
CONS__SrcLineMapVoffBlock *last_voff_block;