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Invalidate warmed wasm modules precisely

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udo
2026-07-13 08:36:55 +00:00
parent ada01e34f4
commit 73a2671112
3 changed files with 45 additions and 16 deletions
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src/wasm/worker.cpp
+11 -4
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@@ -75,7 +75,9 @@ struct WasmUnitModule
{
String source_path; // absolute .uce path
String wasm_path; // artifact in the unit cache
time_t mtime = 0;
u64 modified_ns = 0;
u64 changed_ns = 0;
u64 size = 0;
WasmDylinkInfo dylink;
WasmAbiInfo abi;
std::optional<wasmtime::Module> module;
@@ -640,13 +642,17 @@ public:
return(nullptr);
}
auto cached = module_cache.find(wasm_path);
if(cached != module_cache.end() && cached->second->mtime == st.st_mtime)
u64 modified_ns = (u64)st.st_mtim.tv_sec * 1000000000ull + (u64)st.st_mtim.tv_nsec;
u64 changed_ns = (u64)st.st_ctim.tv_sec * 1000000000ull + (u64)st.st_ctim.tv_nsec;
if(cached != module_cache.end() && cached->second->modified_ns == modified_ns && cached->second->changed_ns == changed_ns && cached->second->size == (u64)st.st_size)
return(cached->second);
auto unit = std::make_shared<WasmUnitModule>();
unit->source_path = source_path;
unit->wasm_path = wasm_path;
unit->mtime = st.st_mtime;
unit->modified_ns = modified_ns;
unit->changed_ns = changed_ns;
unit->size = (u64)st.st_size;
std::vector<u8> bytes;
if(!wasm_read_file(wasm_path, bytes))
{
@@ -696,7 +702,8 @@ private:
struct stat cached_stat;
if(stat(cached_path.c_str(), &cached_stat) == 0 && stat(wasm_path.c_str(), &wasm_stat) == 0)
{
if(cached_stat.st_mtime > wasm_stat.st_mtime)
if(cached_stat.st_mtim.tv_sec > wasm_stat.st_mtim.tv_sec ||
(cached_stat.st_mtim.tv_sec == wasm_stat.st_mtim.tv_sec && cached_stat.st_mtim.tv_nsec > wasm_stat.st_mtim.tv_nsec))
{
auto deserialized = wasmtime::Module::deserialize_file(engine, cached_path);
if(deserialized)