Reland "Write classes in runtime-generated app image."

This reverts commit 24b3d648ff6c2c200003f55ac63fc910d7bfd40f.

Bug: 260557058

Reason for revert:
- Encode class loader context in image, and check it at load time.
- Set nterp entrypoint to methods that can.

Test: test.py
Test: atest com.android.bluetooth.opp.BluetoothOppObexServerSessionTest#onPut_withUnsupportedMimeTypeInHeader_returnsHttpBadRequest

Change-Id: Ibf4a8604c4a226d1acc021103668e211446bb53c

1 files changed, 23 insertions, 0 deletions

diff --git a/runtime/oat.cc b/runtime/oat.cc
index 42bb7d4894..2c7a73f964 100644
--- a/runtime/oat.cc
+++ b/runtime/oat.cc
@@ -467,4 +467,27 @@ void OatHeader::Flatten(const SafeMap<std::string, std::string>* key_value_store
   key_value_store_size_ = data_ptr - reinterpret_cast<char*>(&key_value_store_);
 }
 
+const uint8_t* OatHeader::GetOatAddress(StubType type) const {
+  DCHECK_LE(type, StubType::kLast);
+  switch (type) {
+    // TODO: We could maybe clean this up if we stored them in an array in the oat header.
+    case StubType::kQuickGenericJNITrampoline:
+      return static_cast<const uint8_t*>(GetQuickGenericJniTrampoline());
+    case StubType::kJNIDlsymLookupTrampoline:
+      return static_cast<const uint8_t*>(GetJniDlsymLookupTrampoline());
+    case StubType::kJNIDlsymLookupCriticalTrampoline:
+      return static_cast<const uint8_t*>(GetJniDlsymLookupCriticalTrampoline());
+    case StubType::kQuickIMTConflictTrampoline:
+      return static_cast<const uint8_t*>(GetQuickImtConflictTrampoline());
+    case StubType::kQuickResolutionTrampoline:
+      return static_cast<const uint8_t*>(GetQuickResolutionTrampoline());
+    case StubType::kQuickToInterpreterBridge:
+      return static_cast<const uint8_t*>(GetQuickToInterpreterBridge());
+    case StubType::kNterpTrampoline:
+      return static_cast<const uint8_t*>(GetNterpTrampoline());
+    default:
+      UNREACHABLE();
+  }
+}
+
 }  // namespace art