Fix use of history timers in background threads.

src/wasm/module-decoder.cc

Index: src/wasm/module-decoder.cc
diff --git a/src/wasm/module-decoder.cc b/src/wasm/module-decoder.cc
index 7503e4070b06f491c44c5d4cd11c2eb3cba5e489..904db736db231bac8c5e2d92c64410319d5dc8ff 100644
--- a/src/wasm/module-decoder.cc
+++ b/src/wasm/module-decoder.cc
@@ -1214,11 +1214,13 @@ class ModuleDecoder : public Decoder {
   }
 };
 
-ModuleResult DecodeWasmModuleInternal(Isolate* isolate,
-                                      const byte* module_start,
-                                      const byte* module_end,
-                                      bool verify_functions,
-                                      ModuleOrigin origin, bool is_sync) {
+ModuleResult DecodeWasmModule(Isolate* isolate, const byte* module_start,
+                              const byte* module_end, bool verify_functions,
+                              ModuleOrigin origin, Counters* counters,
+                              bool is_sync) {
+  TimedHistogramScope wasm_decode_module_time_scope(
+      IsWasm(origin) ? counters->wasm_decode_wasm_module_time()
+                     : counters->wasm_decode_asm_module_time());
   size_t size = module_end - module_start;
   if (module_start > module_end) return ModuleResult::Error("start > end");
   if (size >= kV8MaxWasmModuleSize)
@@ -1227,8 +1229,8 @@ ModuleResult DecodeWasmModuleInternal(Isolate* isolate,
   if (is_sync) {
     // TODO(karlschimpf): Make this work when asynchronous.
     // https://bugs.chromium.org/p/v8/issues/detail?id=6361
-    (IsWasm(origin) ? isolate->counters()->wasm_wasm_module_size_bytes()
-                    : isolate->counters()->wasm_asm_module_size_bytes())
+    (IsWasm(origin) ? counters->wasm_wasm_module_size_bytes()
+                    : counters->wasm_asm_module_size_bytes())
         ->AddSample(static_cast<int>(size));
   }
   // Signatures are stored in zone memory, which have the same lifetime
@@ -1242,9 +1244,8 @@ ModuleResult DecodeWasmModuleInternal(Isolate* isolate,
   if (is_sync && result.ok()) {
     // TODO(karlschimpf): Make this work when asynchronous.
     // https://bugs.chromium.org/p/v8/issues/detail?id=6361
-    (IsWasm(origin)
-         ? isolate->counters()->wasm_decode_wasm_module_peak_memory_bytes()
-         : isolate->counters()->wasm_decode_asm_module_peak_memory_bytes())
+    (IsWasm(origin) ? counters->wasm_decode_wasm_module_peak_memory_bytes()
+                    : counters->wasm_decode_asm_module_peak_memory_bytes())
         ->AddSample(
             static_cast<int>(result.val->signature_zone->allocation_size()));
   }
@@ -1253,20 +1254,19 @@ ModuleResult DecodeWasmModuleInternal(Isolate* isolate,
 
 }  // namespace
 
-ModuleResult DecodeWasmModule(Isolate* isolate, const byte* module_start,
-                              const byte* module_end, bool verify_functions,
-                              ModuleOrigin origin, bool is_sync) {
-  if (is_sync) {
-    // TODO(karlschimpf): Make this work when asynchronous.
-    // https://bugs.chromium.org/p/v8/issues/detail?id=6361
-    HistogramTimerScope wasm_decode_module_time_scope(
-        IsWasm(origin) ? isolate->counters()->wasm_decode_wasm_module_time()
-                       : isolate->counters()->wasm_decode_asm_module_time());
-    return DecodeWasmModuleInternal(isolate, module_start, module_end,
-                                    verify_functions, origin, true);
-  }
-  return DecodeWasmModuleInternal(isolate, module_start, module_end,
-                                  verify_functions, origin, false);
+ModuleResult SyncDecodeWasmModule(Isolate* isolate, const byte* module_start,
+                                  const byte* module_end, bool verify_functions,
+                                  ModuleOrigin origin) {
+  return DecodeWasmModule(isolate, module_start, module_end, verify_functions,
+                          origin, isolate->counters(), true);
+}
+
+ModuleResult AsyncDecodeWasmModule(Isolate* isolate, const byte* module_start,
+                                   const byte* module_end,
+                                   bool verify_functions, ModuleOrigin origin,
+                                   const std::shared_ptr<Counters>& counters) {
+  return DecodeWasmModule(isolate, module_start, module_end, verify_functions,
+                          origin, counters.get(), false);
 }
 
 FunctionSig* DecodeWasmSignatureForTesting(Zone* zone, const byte* start,
@@ -1283,12 +1283,19 @@ WasmInitExpr DecodeWasmInitExprForTesting(const byte* start, const byte* end) {
 
 namespace {
 
-FunctionResult DecodeWasmFunctionInternal(Isolate* isolate, Zone* zone,
-                                          ModuleBytesEnv* module_env,
-                                          const byte* function_start,
-                                          const byte* function_end,
-                                          bool is_sync) {
+FunctionResult DecodeWasmFunction(Isolate* isolate, Zone* zone,
+                                  ModuleBytesEnv* module_env,
+                                  const byte* function_start,
+                                  const byte* function_end, Counters* counters,
+                                  bool is_sync) {
   size_t size = function_end - function_start;
+  bool is_wasm = module_env->module_env.is_wasm();
+  (is_wasm ? counters->wasm_wasm_function_size_bytes()
+           : counters->wasm_asm_function_size_bytes())
+      ->AddSample(static_cast<int>(size));
+  TimedHistogramScope wasm_decode_function_time_scope(
+      is_wasm ? counters->wasm_decode_wasm_function_time()
+              : counters->wasm_decode_asm_function_time());
   if (function_start > function_end)
     return FunctionResult::Error("start > end");
   if (size > kV8MaxWasmFunctionSize)
@@ -1297,8 +1304,8 @@ FunctionResult DecodeWasmFunctionInternal(Isolate* isolate, Zone* zone,
     // TODO(karlschimpf): Make this work when asynchronous.
     // https://bugs.chromium.org/p/v8/issues/detail?id=6361
     bool is_wasm = module_env->module_env.is_wasm();
-    (is_wasm ? isolate->counters()->wasm_wasm_function_size_bytes()
-             : isolate->counters()->wasm_asm_function_size_bytes())
+    (is_wasm ? counters->wasm_wasm_function_size_bytes()
+             : counters->wasm_asm_function_size_bytes())
         ->AddSample(static_cast<int>(size));
   }
   ModuleDecoder decoder(function_start, function_end, kWasmOrigin);
@@ -1307,27 +1314,20 @@ FunctionResult DecodeWasmFunctionInternal(Isolate* isolate, Zone* zone,
 }
 
 }  // namespace
+FunctionResult SyncDecodeWasmFunction(Isolate* isolate, Zone* zone,
+                                      ModuleBytesEnv* module_env,
+                                      const byte* function_start,
+                                      const byte* function_end) {
+  return DecodeWasmFunction(isolate, zone, module_env, function_start,
+                            function_end, isolate->counters(), true);
+}
 
-FunctionResult DecodeWasmFunction(Isolate* isolate, Zone* zone,
-                                  ModuleBytesEnv* module_env,
-                                  const byte* function_start,
-                                  const byte* function_end, bool is_sync) {
-  if (is_sync) {
-    // TODO(karlschimpf): Make this work when asynchronous.
-    // https://bugs.chromium.org/p/v8/issues/detail?id=6361
-    size_t size = function_end - function_start;
-    bool is_wasm = module_env->module_env.is_wasm();
-    (is_wasm ? isolate->counters()->wasm_wasm_function_size_bytes()
-             : isolate->counters()->wasm_asm_function_size_bytes())
-        ->AddSample(static_cast<int>(size));
-    HistogramTimerScope wasm_decode_function_time_scope(
-        is_wasm ? isolate->counters()->wasm_decode_wasm_function_time()
-                : isolate->counters()->wasm_decode_asm_function_time());
-    return DecodeWasmFunctionInternal(isolate, zone, module_env, function_start,
-                                      function_end, true);
-  }
-  return DecodeWasmFunctionInternal(isolate, zone, module_env, function_start,
-                                    function_end, false);
+FunctionResult AsyncDecodeWasmFunction(
+    Isolate* isolate, Zone* zone, ModuleBytesEnv* module_env,
+    const byte* function_start, const byte* function_end,
+    const std::shared_ptr<Counters>& counters) {
+  return DecodeWasmFunction(isolate, zone, module_env, function_start,
+                            function_end, counters.get(), false);
 }
 
 AsmJsOffsetsResult DecodeAsmJsOffsets(const byte* tables_start,