nativebridge: Add isNativeBridgeFunctionPointer method

This method lets native bridge report if particular pointer is in the
region of code executable by native bridge implementation.

Bug: 393035780
Test: atest art/libnativebridge/tests
Change-Id: Icaec80cb7efae5b918aed0a98216cbfaeaba330d

1 files changed, 147 insertions, 0 deletions

diff --git a/libnativebridge/tests/NativeBridgeTestCase8.cpp b/libnativebridge/tests/NativeBridgeTestCase8.cpp
new file mode 100644
index 0000000000..c6395f526b
--- /dev/null
+++ b/libnativebridge/tests/NativeBridgeTestCase8.cpp
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// An implementation of the native-bridge interface for testing.
+
+#include "NativeBridge8IdentifyTrampolines_lib.h"
+#include "nativebridge/native_bridge.h"
+
+// NativeBridgeCallbacks implementations
+extern "C" bool native_bridge8_initialize(
+    const android::NativeBridgeRuntimeCallbacks* /* art_cbs */,
+    const char* /* app_code_cache_dir */,
+    const char* /* isa */) {
+  return true;
+}
+
+extern "C" void* native_bridge8_loadLibrary(const char* /* libpath */, int /* flag */) {
+  return nullptr;
+}
+
+extern "C" void* native_bridge8_getTrampoline(void* /* handle */,
+                                              const char* /* name */,
+                                              const char* /* shorty */,
+                                              uint32_t /* len */) {
+  return nullptr;
+}
+
+extern "C" void* native_bridge8_getTrampoline2(void* /* handle */,
+                                               const char* /* name */,
+                                               const char* /* shorty */,
+                                               uint32_t /* len */,
+                                               android::JNICallType /* jni_call_type */) {
+  return nullptr;
+}
+
+extern "C" void* native_bridge8_getTrampolineForFunctionPointer(
+    const void* /* method */,
+    const char* /* shorty */,
+    uint32_t /* len */,
+    android::JNICallType /* jni_call_type */) {
+  return nullptr;
+}
+
+extern "C" bool native_bridge8_isSupported(const char* /* libpath */) { return false; }
+
+extern "C" const struct android::NativeBridgeRuntimeValues* native_bridge8_getAppEnv(
+    const char* /* abi */) {
+  return nullptr;
+}
+
+extern "C" bool native_bridge8_isCompatibleWith(uint32_t version) {
+  // For testing, allow 1-8, but disallow 9+.
+  return version <= 8;
+}
+
+extern "C" android::NativeBridgeSignalHandlerFn native_bridge8_getSignalHandler(int /* signal */) {
+  return nullptr;
+}
+
+extern "C" int native_bridge8_unloadLibrary(void* /* handle */) { return 0; }
+
+extern "C" const char* native_bridge8_getError() { return nullptr; }
+
+extern "C" bool native_bridge8_isPathSupported(const char* /* path */) { return true; }
+
+extern "C" android::native_bridge_namespace_t* native_bridge8_createNamespace(
+    const char* /* name */,
+    const char* /* ld_library_path */,
+    const char* /* default_library_path */,
+    uint64_t /* type */,
+    const char* /* permitted_when_isolated_path */,
+    android::native_bridge_namespace_t* /* parent_ns */) {
+  return nullptr;
+}
+
+extern "C" bool native_bridge8_linkNamespaces(android::native_bridge_namespace_t* /* from */,
+                                              android::native_bridge_namespace_t* /* to */,
+                                              const char* /* shared_libs_soname */) {
+  return true;
+}
+
+extern "C" void* native_bridge8_loadLibraryExt(const char* /* libpath */,
+                                               int /* flag */,
+                                               android::native_bridge_namespace_t* /* ns */) {
+  return nullptr;
+}
+
+extern "C" android::native_bridge_namespace_t* native_bridge8_getVendorNamespace() {
+  return nullptr;
+}
+
+extern "C" android::native_bridge_namespace_t* native_bridge8_getExportedNamespace(
+    const char* /* name */) {
+  return nullptr;
+}
+
+extern "C" bool native_bridge8_isNativeBridgeFunctionPointer(const void* ptr) {
+  android::SetIsNativeBridgeFunctionPointerCalledFor(ptr);
+  return true;
+}
+
+extern "C" void native_bridge8_preZygoteFork() {}
+
+android::NativeBridgeCallbacks NativeBridgeItf{
+    // v1
+    .version = 8,
+    .initialize = &native_bridge8_initialize,
+    .loadLibrary = &native_bridge8_loadLibrary,
+    .getTrampoline = &native_bridge8_getTrampoline,
+    .isSupported = &native_bridge8_isSupported,
+    .getAppEnv = &native_bridge8_getAppEnv,
+    // v2
+    .isCompatibleWith = &native_bridge8_isCompatibleWith,
+    .getSignalHandler = &native_bridge8_getSignalHandler,
+    // v3
+    .unloadLibrary = &native_bridge8_unloadLibrary,
+    .getError = &native_bridge8_getError,
+    .isPathSupported = &native_bridge8_isPathSupported,
+    .unused_initAnonymousNamespace = nullptr,
+    .createNamespace = &native_bridge8_createNamespace,
+    .linkNamespaces = &native_bridge8_linkNamespaces,
+    .loadLibraryExt = &native_bridge8_loadLibraryExt,
+    // v4
+    &native_bridge8_getVendorNamespace,
+    // v5
+    &native_bridge8_getExportedNamespace,
+    // v6
+    &native_bridge8_preZygoteFork,
+    // v7
+    &native_bridge8_getTrampoline2,
+    &native_bridge8_getTrampolineForFunctionPointer,
+    // v8
+    &native_bridge8_isNativeBridgeFunctionPointer,
+};