Implement can_generate_native_method_bind capability

This capability lets one observe and even replace the implementations
of native methods when they are bound.

Test: ./test.py --host -j40

Bug: 37432636
Change-Id: I2432a8e4da1a677e8011ce495296f4ab9f42eb3e

1 files changed, 22 insertions, 0 deletions

diff --git a/runtime/runtime_callbacks.cc b/runtime/runtime_callbacks.cc
index 25324b52d1..16d6c13722 100644
--- a/runtime/runtime_callbacks.cc
+++ b/runtime/runtime_callbacks.cc
@@ -18,6 +18,7 @@
 
 #include <algorithm>
 
+#include "art_method.h"
 #include "base/macros.h"
 #include "class_linker.h"
 #include "thread.h"
@@ -131,4 +132,25 @@ void RuntimeCallbacks::NextRuntimePhase(RuntimePhaseCallback::RuntimePhase phase
   }
 }
 
+void RuntimeCallbacks::AddMethodCallback(MethodCallback* cb) {
+  method_callbacks_.push_back(cb);
+}
+
+void RuntimeCallbacks::RemoveMethodCallback(MethodCallback* cb) {
+  Remove(cb, &method_callbacks_);
+}
+
+void RuntimeCallbacks::RegisterNativeMethod(ArtMethod* method,
+                                            const void* in_cur_method,
+                                            /*out*/void** new_method) {
+  void* cur_method = const_cast<void*>(in_cur_method);
+  *new_method = cur_method;
+  for (MethodCallback* cb : method_callbacks_) {
+    cb->RegisterNativeMethod(method, cur_method, new_method);
+    if (*new_method != nullptr) {
+      cur_method = *new_method;
+    }
+  }
+}
+
 }  // namespace art