libbinder: build option to disable the kernel IPC, part 1/2

Add a new BINDER_WITH_KERNEL_IPC macro to enable all code that
uses IPCThreadState or ProcessState. This macro is defined for
Android libbinder but left out for non-Android builds.

Bug: 224644083
Test: m
Change-Id: I622757fcc0f9885dbf271c0ffa84c54938d50774

1 files changed, 6 insertions, 0 deletions

diff --git a/libs/binder/Debug.cpp b/libs/binder/Debug.cpp
index e4ac4b49a4..c6e4fb378d 100644
--- a/libs/binder/Debug.cpp
+++ b/libs/binder/Debug.cpp
@@ -15,6 +15,7 @@
  */
 
 #include "Debug.h"
+#include "BuildFlags.h"
 
 #include <binder/ProcessState.h>
 
@@ -301,6 +302,11 @@ void printHexData(int32_t indent, const void *buf, size_t length,
 }
 
 ssize_t getBinderKernelReferences(size_t count, uintptr_t* buf) {
+    if constexpr (!kEnableKernelIpc) {
+        LOG_ALWAYS_FATAL("Binder kernel driver disabled at build time");
+        return 0;
+    }
+
     sp<ProcessState> proc = ProcessState::selfOrNull();
     if (proc.get() == nullptr) {
         return 0;