Revert "Revert "Basic structural redefinition support""

This reverts commit 5a2301d897294ff4ee6de71f459dc2566dc3fa1a.

Bug: 134162467

Reason for revert: Relanding as unclear if issue is due to topic.

Change-Id: Ib1d1cf2e9132e30c9649b760ae9ae2d8ceacf843

1 files changed, 22 insertions, 0 deletions

diff --git a/runtime/jit/jit_code_cache.cc b/runtime/jit/jit_code_cache.cc
index c0342baa23..ecfe9b66f0 100644
--- a/runtime/jit/jit_code_cache.cc
+++ b/runtime/jit/jit_code_cache.cc
@@ -1686,6 +1686,28 @@ void JitCodeCache::DoneCompiling(ArtMethod* method, Thread* self, bool osr) {
   }
 }
 
+void JitCodeCache::InvalidateAllCompiledCode() {
+  art::MutexLock mu(Thread::Current(), *Locks::jit_lock_);
+  size_t cnt = profiling_infos_.size();
+  size_t osr_size = osr_code_map_.size();
+  for (ProfilingInfo* pi : profiling_infos_) {
+    // NB Due to OSR we might run this on some methods multiple times but this should be fine.
+    ArtMethod* meth = pi->GetMethod();
+    pi->SetSavedEntryPoint(nullptr);
+    // We had a ProfilingInfo so we must be warm.
+    ClearMethodCounter(meth, /*was_warm=*/true);
+    ClassLinker* linker = Runtime::Current()->GetClassLinker();
+    if (meth->IsObsolete()) {
+      linker->SetEntryPointsForObsoleteMethod(meth);
+    } else {
+      linker->SetEntryPointsToInterpreter(meth);
+    }
+  }
+  osr_code_map_.clear();
+  VLOG(jit) << "Invalidated the compiled code of " << (cnt - osr_size) << " methods and "
+            << osr_size << " OSRs.";
+}
+
 void JitCodeCache::InvalidateCompiledCodeFor(ArtMethod* method,
                                              const OatQuickMethodHeader* header) {
   DCHECK(!method->IsNative());