Fix processing profiler samples in the presence of Thumb code.

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 4e371794ca55f50128f9d594f34be0c78b54fef5..38118a60c8e405b2e025fa18f3f2e947338bb066 100644
--- a/runtime/vm/profiler_service.cc
+++ b/runtime/vm/profiler_service.cc
@@ -1905,6 +1905,13 @@ class ProfileBuilder : public ValueObject {
                             0,
                             code);
     }
+
+#if defined(HOST_ARCH_ARM)
+    // The symbol for a Thumb function will be xxx1, but we may have samples
+    // at function entry which will have pc xxx0.
+    native_start &= ~1;
+#endif
+
     ASSERT(pc >= native_start);
     ProfileCode* profile_code =
         new ProfileCode(ProfileCode::kNativeCode,
@@ -1913,7 +1920,7 @@ class ProfileBuilder : public ValueObject {
                        0,
                        code);
     profile_code->SetName(native_name);
-    free(native_name);
+    NativeSymbolResolver::FreeSymbolName(native_name);
     return profile_code;
   }