VM: Service isolate under precompilation.

runtime/vm/profiler_service.cc

Index: runtime/vm/profiler_service.cc
diff --git a/runtime/vm/profiler_service.cc b/runtime/vm/profiler_service.cc
index 7ea7d3b129cc138ebf54bb7b7f3494861c74cffb..4e371794ca55f50128f9d594f34be0c78b54fef5 100644
--- a/runtime/vm/profiler_service.cc
+++ b/runtime/vm/profiler_service.cc
@@ -1876,6 +1876,16 @@ class ProfileBuilder : public ValueObject {
                               code.compile_timestamp(),
                               code);
       }
+      // Precompiled instructions are in the VM isolate, but the code (except
+      // stubs) is in the current isolate.
+      code ^= Code::LookupCode(pc);
+      if (!code.IsNull()) {
+        return new ProfileCode(ProfileCode::kDartCode,
+                              code.EntryPoint(),
+                              code.EntryPoint() + code.Size(),
+                              code.compile_timestamp(),
+                              code);
+      }
       return new ProfileCode(ProfileCode::kCollectedCode,
                             pc,
                             (pc & kDartCodeAlignmentMask) + kDartCodeAlignment,