Support for saving Dart compilation trace on device. (flutter#5443)

Support for saving Dart compilation trace on device.
pandavickey · Jun 8, 2018 · d4f5ef6 · d4f5ef6
1 parent d328f4e
commit d4f5ef6
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Showing 3 changed files with 31 additions and 0 deletions.
diff --git a/lib/ui/dart_runtime_hooks.cc b/lib/ui/dart_runtime_hooks.cc
@@ -47,6 +47,7 @@ namespace blink {
 
 #define BUILTIN_NATIVE_LIST(V) \
   V(Logger_PrintString, 1)     \
+  V(SaveCompilationTrace, 0)   \
   V(ScheduleMicrotask, 1)
 
 BUILTIN_NATIVE_LIST(DECLARE_FUNCTION);
@@ -199,6 +200,24 @@ void Logger_PrintString(Dart_NativeArguments args) {
   }
 }
 
+void SaveCompilationTrace(Dart_NativeArguments args) {
+  uint8_t* buffer = nullptr;
+  intptr_t length = 0;
+  Dart_Handle result = Dart_SaveCompilationTrace(&buffer, &length);
+  if (Dart_IsError(result)) {
+    Dart_SetReturnValue(args, result);
+    return;
+  }
+
+  result = Dart_NewExternalTypedData(Dart_TypedData_kUint8, buffer, length);
+  if (Dart_IsError(result)) {
+    Dart_SetReturnValue(args, result);
+    return;
+  }
+
+  Dart_SetReturnValue(args, result);
+}
+
 void ScheduleMicrotask(Dart_NativeArguments args) {
   Dart_Handle closure = Dart_GetNativeArgument(args, 0);
   UIDartState::Current()->ScheduleMicrotask(closure);

diff --git a/lib/ui/natives.dart b/lib/ui/natives.dart
@@ -35,6 +35,17 @@ void _setupHooks() {
   }());
 }
 
+void saveCompilationTrace(String filePath) {
+  final result = _saveCompilationTrace();
+  if (result is Error)
+    throw result;
+
+  final file = new File(filePath);
+  file.writeAsBytesSync(result);
+}
+
+dynamic _saveCompilationTrace() native 'SaveCompilationTrace';
+
 void _scheduleMicrotask(void callback()) native 'ScheduleMicrotask';
 
 // Required for gen_snapshot to work correctly.

diff --git a/lib/ui/ui.dart b/lib/ui/ui.dart
@@ -16,6 +16,7 @@ import 'dart:async';
 import 'dart:collection' as collection;
 import 'dart:convert';
 import 'dart:developer' as developer;
+import 'dart:io';
 import 'dart:math' as math;
 import 'dart:nativewrappers';
 import 'dart:typed_data';