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, 14 insertions, 0 deletions

diff --git a/libnativebridge/native_bridge.cc b/libnativebridge/native_bridge.cc
index 4461f79919..af85d4ee35 100644
--- a/libnativebridge/native_bridge.cc
+++ b/libnativebridge/native_bridge.cc
@@ -133,6 +133,8 @@ enum NativeBridgeImplementationVersion {
   PRE_ZYGOTE_FORK_VERSION = 6,
   // The version with critical_native support
   CRITICAL_NATIVE_SUPPORT_VERSION = 7,
+  // The version with native bridge detection fallback for function pointers
+  IDENTIFY_NATIVELY_BRIDGED_FUNCTION_POINTERS_VERSION = 8,
 };
 
 // Whether we had an error at some point.
@@ -732,6 +734,18 @@ void* NativeBridgeLoadLibraryExt(const char* libpath, int flag, native_bridge_na
   return nullptr;
 }
 
+bool NativeBridgeIsNativeBridgeFunctionPointer(const void* method) {
+  if (NativeBridgeInitialized()) {
+    if (isCompatibleWith(IDENTIFY_NATIVELY_BRIDGED_FUNCTION_POINTERS_VERSION)) {
+      return callbacks->isNativeBridgeFunctionPointer(method);
+    } else {
+      ALOGW("not compatible with version %d, unable to call isNativeBridgeFunctionPointer",
+            IDENTIFY_NATIVELY_BRIDGED_FUNCTION_POINTERS_VERSION);
+    }
+  }
+  return false;
+}
+
 }  // extern "C"
 
 }  // namespace android