Changes to support dprof and Observatory profiler UIs

runtime/vm/code_patcher.cc

Index: runtime/vm/code_patcher.cc
diff --git a/runtime/vm/code_patcher.cc b/runtime/vm/code_patcher.cc
index 6fda035f4047783368cc8dffa9e299c6d09d6b20..283a70648aa060810f30a534ab01490d058af6d0 100644
--- a/runtime/vm/code_patcher.cc
+++ b/runtime/vm/code_patcher.cc
@@ -65,12 +65,23 @@ void CodePatcher::RestoreEntry(const Code& code) {
 }
 
 
+bool CodePatcher::IsEntryPatched(const Code& code) {
+  const uword patch_addr = code.GetPcForDeoptId(Isolate::kNoDeoptId,
+                                                PcDescriptors::kEntryPatch);
+  if (patch_addr == 0) {
+    return false;
+  }
+  JumpPattern jmp_entry(patch_addr, code);
+  return jmp_entry.IsValid();
+}
+
+
 bool CodePatcher::CodeIsPatchable(const Code& code) {
   const uword patch_addr = code.GetPcForDeoptId(Isolate::kNoDeoptId,
                                                 PcDescriptors::kEntryPatch);
   // kEntryPatch may not exist which means the function is not patchable.
   if (patch_addr == 0) {
-    return true;
+    return false;
   }
   JumpPattern jmp_entry(patch_addr, code);
   if (code.Size() < (jmp_entry.pattern_length_in_bytes() * 2)) {