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Cache loaded overlay membership during lazy candidate discovery

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This commit is contained in:
Matthew Stanley
2026-09-19 20:01:14 -07:00
parent 95a977953b
commit 04c6dc383c
1 changed files with 22 additions and 2 deletions
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runtime/src/overlay_loader.c
+22 -2
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@@ -1207,6 +1207,8 @@ typedef struct {
uint8_t load_failed;
int resident;
int capacity_suppressed;
int loaded_check_count;
int loaded_check_result;
char path[768];
} CacheEntry;
static CacheEntry s_cache_idx[CACHE_IDX_CAP];
@@ -1729,6 +1731,8 @@ static int add_posix_cache_file(const PsxOverlayCacheFile *file, void *opaque) {
e->tier = (uint8_t)tier;
e->manifest_ok = 0;
e->load_failed = 0;
e->loaded_check_count = -1;
e->loaded_check_result = 0;
e->resident = cache_path_is_bios_resident(file->path);
e->capacity_suppressed = 0;
snprintf(e->path, sizeof(e->path), "%s", file->path);
@@ -1773,6 +1777,8 @@ static void scan_one_cache_dir(const char *dir, int tier) {
e->tier = (uint8_t)tier;
e->manifest_ok = 0;
e->load_failed = 0;
e->loaded_check_count = -1;
e->loaded_check_result = 0;
e->capacity_suppressed = 0;
snprintf(e->path, sizeof(e->path), "%s", full);
e->resident = cache_path_is_bios_resident(full);
@@ -2999,6 +3005,20 @@ static int dll_already_loaded(const char *path) {
return 0;
}
/* A lazy manifest chain may have hundreds of functions from the same DLL.
* Re-comparing every long Windows path (including locale case folding) for
* each function dominates uncovered CPS continuation dispatches. Loaded paths
* are append-only: cache membership per artifact until that set grows. This
* caches only path membership; live code/manifest validation is unchanged. */
static int cache_entry_already_loaded(int ci) {
CacheEntry *e = &s_cache_idx[ci];
if (e->loaded_check_count != s_nloaded_paths) {
e->loaded_check_result = dll_already_loaded(e->path);
e->loaded_check_count = s_nloaded_paths;
}
return e->loaded_check_result;
}
static void overlay_library_close(OverlayLibraryHandle handle) {
if (!handle) return;
#ifdef _WIN32
@@ -3327,7 +3347,7 @@ static int lazy_is_loadable(int li, uint32_t region_start, uint32_t phys,
s_cache_idx[ci].region_start == region_start) &&
!s_cache_idx[ci].load_failed &&
!s_cache_idx[ci].capacity_suppressed &&
!dll_already_loaded(s_cache_idx[ci].path) &&
!cache_entry_already_loaded(ci) &&
lazy_man_contains(&lm->fn, phys) && lazy_man_matches(lm);
}
@@ -3347,7 +3367,7 @@ static int lazy_load_selected(int li) {
if (ci < 0 || ci >= s_cache_idx_count || ci >= CACHE_IDX_CAP ||
s_cache_idx[ci].load_failed ||
s_cache_idx[ci].capacity_suppressed ||
dll_already_loaded(s_cache_idx[ci].path) ||
cache_entry_already_loaded(ci) ||
s_cache_idx[ci].func_count <= 0) return 0;
/* If proactive warming has not reached this fragment yet, prefer the
* historical synchronous path over running a potentially hot function in