From bca8f94b73f48080e1d4fa8bc1a9a9efabf9f629 Mon Sep 17 00:00:00 2001
From: Tomasz Wasilczyk <twasilczyk@google.com>
Date: Mon, 9 Oct 2023 17:42:37 +0000
Subject: Disable Blob outside of Android

Bug: 302723053
Test: mma
Change-Id: I2abc138831da28783b26efe75ee6f4583e263692
---
 libs/binder/Android.bp | 16 ++++++++++++++++
 libs/binder/Parcel.cpp | 17 +++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/libs/binder/Android.bp b/libs/binder/Android.bp
index fd2b27f839..67e92ca1cb 100644
--- a/libs/binder/Android.bp
+++ b/libs/binder/Android.bp
@@ -358,6 +358,22 @@ cc_library_static {
     ],
 }
 
+cc_library_static {
+    name: "libbinder_rpc_no_blob",
+    vendor_available: true,
+    defaults: [
+        "libbinder_common_defaults",
+        "libbinder_android_defaults",
+        "libbinder_kernel_defaults",
+    ],
+    cflags: [
+        "-DBINDER_DISABLE_BLOB",
+    ],
+    visibility: [
+        ":__subpackages__",
+    ],
+}
+
 cc_library_static {
     name: "libbinder_rpc_single_threaded",
     defaults: [
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 16944a6221..a59b9284fc 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -40,7 +40,9 @@
 #include <binder/TextOutput.h>
 
 #include <android-base/scopeguard.h>
+#ifndef BINDER_DISABLE_BLOB
 #include <cutils/ashmem.h>
+#endif
 #include <utils/Flattenable.h>
 #include <utils/Log.h>
 #include <utils/String16.h>
@@ -1548,6 +1550,12 @@ status_t Parcel::writeUniqueFileDescriptor(const base::unique_fd& fd) {
 
 status_t Parcel::writeBlob(size_t len, bool mutableCopy, WritableBlob* outBlob)
 {
+#ifdef BINDER_DISABLE_BLOB
+    (void)len;
+    (void)mutableCopy;
+    (void)outBlob;
+    return INVALID_OPERATION;
+#else
     if (len > INT32_MAX) {
         // don't accept size_t values which may have come from an
         // inadvertent conversion from a negative int.
@@ -1599,6 +1607,7 @@ status_t Parcel::writeBlob(size_t len, bool mutableCopy, WritableBlob* outBlob)
     }
     ::close(fd);
     return status;
+#endif
 }
 
 status_t Parcel::writeDupImmutableBlobFileDescriptor(int fd)
@@ -2382,6 +2391,11 @@ status_t Parcel::readUniqueParcelFileDescriptor(base::unique_fd* val) const
 
 status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const
 {
+#ifdef BINDER_DISABLE_BLOB
+    (void)len;
+    (void)outBlob;
+    return INVALID_OPERATION;
+#else
     int32_t blobType;
     status_t status = readInt32(&blobType);
     if (status) return status;
@@ -2415,6 +2429,7 @@ status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const
 
     outBlob->init(fd, ptr, len, isMutable);
     return NO_ERROR;
+#endif
 }
 
 status_t Parcel::read(FlattenableHelperInterface& val) const
@@ -3158,6 +3173,7 @@ size_t Parcel::getOpenAshmemSize() const
     }
 
     size_t openAshmemSize = 0;
+#ifndef BINDER_DISABLE_BLOB
     for (size_t i = 0; i < kernelFields->mObjectsSize; i++) {
         const flat_binder_object* flat =
                 reinterpret_cast<const flat_binder_object*>(mData + kernelFields->mObjects[i]);
@@ -3172,6 +3188,7 @@ size_t Parcel::getOpenAshmemSize() const
             }
         }
     }
+#endif
     return openAshmemSize;
 }
 #endif // BINDER_WITH_KERNEL_IPC
-- 
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