Reland "[wasm] Deduplicate wasm scripts"
This is a reland of 6ebccbd1f4
Original change's description:
> [wasm] Deduplicate wasm scripts
>
> R=clemensb@chromium.org
>
> Bug: v8:6847
> Change-Id: I4509a7011a0d32f5bbd2eabf3d2ee6ef5304263d
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2124320
> Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66981}
Bug: v8:6847
Change-Id: I74f51b9b15df74de800fbbf031515d26aaa70dbc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2135735
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67006}
This commit is contained in:
parent
44d15f65fe
commit
c9ce1b5662
@ -1604,10 +1604,9 @@ void AsyncCompileJob::PrepareRuntimeObjects() {
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DCHECK(module_object_.is_null());
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const WasmModule* module = native_module_->module();
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auto source_url = stream_ ? stream_->url() : Vector<const char>();
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Handle<Script> script = CreateWasmScript(
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isolate_, native_module_->wire_bytes(), VectorOf(module->source_map_url),
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auto script = isolate_->wasm_engine()->GetOrCreateScript(
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isolate_, native_module_.get(), VectorOf(module->source_map_url),
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module->name, source_url);
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Handle<WasmModuleObject> module_object =
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WasmModuleObject::New(isolate_, native_module_, script);
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@ -131,6 +131,31 @@ class WasmGCForegroundTask : public CancelableTask {
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Isolate* isolate_;
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};
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class WeakScriptHandle {
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public:
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explicit WeakScriptHandle(Handle<Script> handle) {
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auto global_handle =
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handle->GetIsolate()->global_handles()->Create(*handle);
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location_ = std::make_unique<Address*>(global_handle.location());
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GlobalHandles::MakeWeak(location_.get());
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}
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WeakScriptHandle(WeakScriptHandle&&) V8_NOEXCEPT = default;
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~WeakScriptHandle() {
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if (location_) {
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GlobalHandles::Destroy(*location_);
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}
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}
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Handle<Script> handle() { return Handle<Script>(*location_); }
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private:
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// Store the location in a unique_ptr so that its address stays the same even
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// when this object is moved/copied.
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std::unique_ptr<Address*> location_;
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};
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} // namespace
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std::shared_ptr<NativeModule> NativeModuleCache::MaybeGetNativeModule(
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@ -320,6 +345,9 @@ struct WasmEngine::IsolateInfo {
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// grows, never shrinks).
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std::set<NativeModule*> native_modules;
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// Scripts created for each native module in this isolate.
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std::unordered_map<NativeModule*, WeakScriptHandle> scripts;
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// Caches whether code needs to be logged on this isolate.
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bool log_codes;
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@ -462,9 +490,9 @@ MaybeHandle<WasmModuleObject> WasmEngine::SyncCompile(
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#endif
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Handle<Script> script =
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CreateWasmScript(isolate, bytes.module_bytes(),
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VectorOf(native_module->module()->source_map_url),
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native_module->module()->name);
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GetOrCreateScript(isolate, native_module.get(),
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VectorOf(native_module->module()->source_map_url),
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native_module->module()->name);
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// Create the compiled module object and populate with compiled functions
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// and information needed at instantiation time. This object needs to be
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@ -928,6 +956,7 @@ void WasmEngine::FreeNativeModule(NativeModule* native_module) {
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IsolateInfo* info = isolates_[isolate].get();
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DCHECK_EQ(1, info->native_modules.count(native_module));
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info->native_modules.erase(native_module);
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info->scripts.erase(native_module);
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// If there are {WasmCode} objects of the deleted {NativeModule}
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// outstanding to be logged in this isolate, remove them. Decrementing the
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// ref count is not needed, since the {NativeModule} dies anyway.
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@ -1089,6 +1118,28 @@ void WasmEngine::FreeDeadCodeLocked(const DeadCodeMap& dead_code) {
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}
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}
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Handle<Script> WasmEngine::GetOrCreateScript(Isolate* isolate,
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NativeModule* native_module,
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Vector<const char> source_map_url,
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WireBytesRef name,
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Vector<const char> source_url) {
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DCHECK_EQ(1, isolates_.count(isolate));
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auto& scripts = isolates_[isolate]->scripts;
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auto it = scripts.find(native_module);
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if (it != scripts.end()) {
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Handle<Script> weak_global_handle = it->second.handle();
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if (weak_global_handle.is_null()) {
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scripts.erase(it);
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} else {
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return Handle<Script>::New(*weak_global_handle, isolate);
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}
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}
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auto script = CreateWasmScript(isolate, native_module->wire_bytes(),
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source_map_url, name, source_url);
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scripts.emplace(native_module, WeakScriptHandle(script));
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return script;
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}
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void WasmEngine::TriggerGC(int8_t gc_sequence_index) {
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DCHECK_NULL(current_gc_info_);
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DCHECK(FLAG_wasm_code_gc);
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@ -335,6 +335,11 @@ class V8_EXPORT_PRIVATE WasmEngine {
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void FreeDeadCode(const DeadCodeMap&);
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void FreeDeadCodeLocked(const DeadCodeMap&);
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Handle<Script> GetOrCreateScript(Isolate*, NativeModule*,
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Vector<const char> source_map_url,
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WireBytesRef name,
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Vector<const char> source_url = {});
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// Call on process start and exit.
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static void InitializeOncePerProcess();
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static void GlobalTearDown();
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@ -1,15 +1,25 @@
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Tests how wasm scripts are reported
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Check that each inspector gets a wasm script at module creation time.
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Session #1: Script #0 parsed. URL: wasm://wasm/7b04570e. Source map URL: , module begin: 0, module end: 0, code offset: 34
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Session #2: Script #0 parsed. URL: wasm://wasm/7b04570e. Source map URL: , module begin: 0, module end: 0, code offset: 34
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Session #1: Script #1 parsed. URL: wasm://wasm/ba7c35be. Source map URL: wasm://dwarf, module begin: 0, module end: 0, code offset: 34
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Session #2: Script #1 parsed. URL: wasm://wasm/ba7c35be. Source map URL: wasm://dwarf, module begin: 0, module end: 0, code offset: 34
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Session #1: Script #2 parsed. URL: wasm://wasm/1baa71fe. Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #2: Script #2 parsed. URL: wasm://wasm/1baa71fe. Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #1: Script #3 parsed. URL: wasm://wasm/95e97206. Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #2: Script #3 parsed. URL: wasm://wasm/95e97206. Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #1: Script #4 parsed. URL: wasm://wasm/7ab47392. Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #2: Script #4 parsed. URL: wasm://wasm/7ab47392. Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #1: Script #0 parsed. URL: wasm://wasm/7b04570e. Script ID: 0, Source map URL: , module begin: 0, module end: 0, code offset: 34
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Session #2: Script #0 parsed. URL: wasm://wasm/7b04570e. Script ID: 0, Source map URL: , module begin: 0, module end: 0, code offset: 34
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Session #1: Script #1 parsed. URL: wasm://wasm/7b04570e. Script ID: 0, Source map URL: , module begin: 0, module end: 0, code offset: 34
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Session #2: Script #1 parsed. URL: wasm://wasm/7b04570e. Script ID: 0, Source map URL: , module begin: 0, module end: 0, code offset: 34
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Session #1: Script #2 parsed. URL: wasm://wasm/ba7c35be. Script ID: 1, Source map URL: wasm://dwarf, module begin: 0, module end: 0, code offset: 34
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Session #2: Script #2 parsed. URL: wasm://wasm/ba7c35be. Script ID: 1, Source map URL: wasm://dwarf, module begin: 0, module end: 0, code offset: 34
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Session #1: Script #3 parsed. URL: wasm://wasm/1baa71fe. Script ID: 2, Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #2: Script #3 parsed. URL: wasm://wasm/1baa71fe. Script ID: 2, Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #1: Script #4 parsed. URL: wasm://wasm/95e97206. Script ID: 3, Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #2: Script #4 parsed. URL: wasm://wasm/95e97206. Script ID: 3, Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #1: Script #5 parsed. URL: wasm://wasm/7ab47392. Script ID: 4, Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #2: Script #5 parsed. URL: wasm://wasm/7ab47392. Script ID: 4, Source map URL: abc, module begin: 0, module end: 0, code offset: 34
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Session #1: Source for wasm://wasm/7b04570e:
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Raw: 00 61 73 6d 01 00 00 00 01 07 02 60 00 00 60 00 00 03 03 02 00 01 07 08 01 04 6d 61 69 6e 00 01 0a 0e 02 03 00 01 0b 08 00 02 40 41 02 1a 0b 0b 00 1b 04 6e 61 6d 65 01 14 02 00 0b 6e 6f 70 46 75 6e 63 74 69 6f 6e 01 04 6d 61 69 6e
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Imports: []
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Exports: [main: function]
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Session #2: Source for wasm://wasm/7b04570e:
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Raw: 00 61 73 6d 01 00 00 00 01 07 02 60 00 00 60 00 00 03 03 02 00 01 07 08 01 04 6d 61 69 6e 00 01 0a 0e 02 03 00 01 0b 08 00 02 40 41 02 1a 0b 0b 00 1b 04 6e 61 6d 65 01 14 02 00 0b 6e 6f 70 46 75 6e 63 74 69 6f 6e 01 04 6d 61 69 6e
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Imports: []
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Exports: [main: function]
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Session #1: Source for wasm://wasm/7b04570e:
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Raw: 00 61 73 6d 01 00 00 00 01 07 02 60 00 00 60 00 00 03 03 02 00 01 07 08 01 04 6d 61 69 6e 00 01 0a 0e 02 03 00 01 0b 08 00 02 40 41 02 1a 0b 0b 00 1b 04 6e 61 6d 65 01 14 02 00 0b 6e 6f 70 46 75 6e 63 74 69 6f 6e 01 04 6d 61 69 6e
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Imports: []
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@ -35,6 +35,15 @@ function testFunction(bytes) {
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new WebAssembly.Module(new Uint8Array(bytes));
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}
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// Generate stable IDs.
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let scriptIds = {};
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function nextStableId(id) {
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if (!(id in scriptIds)) {
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scriptIds[id] = Object.keys(scriptIds).length;
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}
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return scriptIds[id];
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}
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contextGroup.addScript(testFunction.toString(), 0, 0, 'v8://test/testFunction');
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InspectorTest.log(
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@ -55,6 +64,9 @@ sessions[0].Protocol.Runtime
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// no debug info
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testFunction([${createModule()}]);
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// shared script for identical modules
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testFunction([${createModule()}]);
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// DWARF
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testFunction([${createModule(dwarfSection)}]);
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@ -87,8 +99,9 @@ function trackScripts(debuggerParams) {
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async function loadScript(
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{url, scriptId, sourceMapURL, startColumn, endColumn, codeOffset}) {
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let stableId = nextStableId(scriptId);
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InspectorTest.log(`Session #${sessionId}: Script #${
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scripts.length} parsed. URL: ${url}. Source map URL: ${
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scripts.length} parsed. URL: ${url}. Script ID: ${stableId}, Source map URL: ${
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sourceMapURL}, module begin: ${startColumn}, module end: ${endColumn}, code offset: ${codeOffset}`);
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let {result: {scriptSource, bytecode}} =
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await Protocol.Debugger.getScriptSource({scriptId});
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