From 8e62c8a9b44302108ddcb10f7c3efb410c4b0f1e Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@google.com>
Date: Sun, 4 Aug 2024 16:10:57 -0700
Subject: [PATCH] libcutils: Split uevent_open_socket()

The best time to attach a BPF filter to a socket is before a socket
starts receiving data. Netlink sockets start receiving data after bind()
has been called. uevent_open_socket() calls socket() and bind(). Hence
split uevent_open_socket() into two functions: one function that calls
socket() and another function that calls bind().

Bug: 203462310
Change-Id: Ia41dee4683358cf9fbb6288fad863cd4f4ac9924
Signed-off-by: Bart Van Assche <bvanassche@google.com>
---
 .../arm64/source-based/libcutils.so.lsdump    | 226 +++++++-----------
 .../source-based/libcutils.so.lsdump          | 208 +++++-----------
 libcutils/include/cutils/uevent.h             |   2 +
 libcutils/uevent.cpp                          |  62 ++++-
 4 files changed, 195 insertions(+), 303 deletions(-)

diff --git a/libcutils/abi-dumps/arm64/source-based/libcutils.so.lsdump b/libcutils/abi-dumps/arm64/source-based/libcutils.so.lsdump
index 67c7514a6..7ed131cf4 100644
--- a/libcutils/abi-dumps/arm64/source-based/libcutils.so.lsdump
+++ b/libcutils/abi-dumps/arm64/source-based/libcutils.so.lsdump
@@ -6,7 +6,6 @@
    "linker_set_key" : "_ZTIA0_i",
    "name" : "int[0]",
    "referenced_type" : "_ZTIi",
-   "self_type" : "_ZTIA0_i",
    "source_file" : "system/core/libcutils/include/cutils/native_handle.h"
   }
  ],
@@ -17,8 +16,6 @@
    "is_integral" : true,
    "linker_set_key" : "_ZTIa",
    "name" : "signed char",
-   "referenced_type" : "_ZTIa",
-   "self_type" : "_ZTIa",
    "size" : 1
   },
   {
@@ -27,8 +24,6 @@
    "is_unsigned" : true,
    "linker_set_key" : "_ZTIb",
    "name" : "bool",
-   "referenced_type" : "_ZTIb",
-   "self_type" : "_ZTIb",
    "size" : 1
   },
   {
@@ -37,25 +32,27 @@
    "is_unsigned" : true,
    "linker_set_key" : "_ZTIc",
    "name" : "char",
-   "referenced_type" : "_ZTIc",
-   "self_type" : "_ZTIc",
    "size" : 1
   },
   {
    "alignment" : 4,
    "linker_set_key" : "_ZTIf",
    "name" : "float",
-   "referenced_type" : "_ZTIf",
-   "self_type" : "_ZTIf",
    "size" : 4
   },
+  {
+   "alignment" : 1,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIh",
+   "name" : "unsigned char",
+   "size" : 1
+  },
   {
    "alignment" : 4,
    "is_integral" : true,
    "linker_set_key" : "_ZTIi",
    "name" : "int",
-   "referenced_type" : "_ZTIi",
-   "self_type" : "_ZTIi",
    "size" : 4
   },
   {
@@ -64,8 +61,6 @@
    "is_unsigned" : true,
    "linker_set_key" : "_ZTIj",
    "name" : "unsigned int",
-   "referenced_type" : "_ZTIj",
-   "self_type" : "_ZTIj",
    "size" : 4
   },
   {
@@ -73,8 +68,6 @@
    "is_integral" : true,
    "linker_set_key" : "_ZTIl",
    "name" : "long",
-   "referenced_type" : "_ZTIl",
-   "self_type" : "_ZTIl",
    "size" : 8
   },
   {
@@ -83,15 +76,49 @@
    "is_unsigned" : true,
    "linker_set_key" : "_ZTIm",
    "name" : "unsigned long",
-   "referenced_type" : "_ZTIm",
-   "self_type" : "_ZTIm",
    "size" : 8
   },
+  {
+   "alignment" : 16,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIo",
+   "name" : "unsigned __int128",
+   "size" : 16
+  },
+  {
+   "alignment" : 2,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIs",
+   "name" : "short",
+   "size" : 2
+  },
+  {
+   "alignment" : 2,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIt",
+   "name" : "unsigned short",
+   "size" : 2
+  },
   {
    "linker_set_key" : "_ZTIv",
-   "name" : "void",
-   "referenced_type" : "_ZTIv",
-   "self_type" : "_ZTIv"
+   "name" : "void"
+  },
+  {
+   "alignment" : 8,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIx",
+   "name" : "long long",
+   "size" : 8
+  },
+  {
+   "alignment" : 8,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIy",
+   "name" : "unsigned long long",
+   "size" : 8
   }
  ],
  "elf_functions" :
@@ -99,70 +126,6 @@
   {
    "name" : "_Z23socket_make_sockaddr_unPKciP11sockaddr_unPj"
   },
-  {
-   "binding" : "weak",
-   "name" : "_ZN7android4base4TrimIRNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEEEES8_OT_"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE4syncEv"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE5imbueERKNS_6localeE"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE6setbufEPcl"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekoffExNS_8ios_base7seekdirEj"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekposENS_4fposI9mbstate_tEEj"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE8overflowEi"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE9pbackfailEi"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE9underflowEv"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2Ev"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED0Ev"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED2Ev"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_m"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__16vectorI5EntryNS_9allocatorIS1_EEE24__emplace_back_slow_pathIJS1_EEEvDpOT_"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__17getlineIcNS_11char_traitsIcEENS_9allocatorIcEEEERNS_13basic_istreamIT_T0_EES9_RNS_12basic_stringIS6_S7_T1_EES6_"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__1lsINS_11char_traitsIcEEEERNS_13basic_ostreamIcT_EES6_PKc"
-  },
   {
    "name" : "android_get_control_file"
   },
@@ -487,6 +450,12 @@
   {
    "name" : "str_parms_to_str"
   },
+  {
+   "name" : "uevent_bind"
+  },
+  {
+   "name" : "uevent_create_socket"
+  },
   {
    "name" : "uevent_kernel_multicast_recv"
   },
@@ -502,22 +471,6 @@
  ],
  "elf_objects" :
  [
-  {
-   "binding" : "weak",
-   "name" : "_ZTCNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE0_NS_13basic_istreamIcS2_EE"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZTTNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZTVNSt3__113basic_filebufIcNS_11char_traitsIcEEEE"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZTVNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE"
-  },
   {
    "name" : "atrace_enabled_tags"
   },
@@ -553,8 +506,6 @@
    ],
    "linker_set_key" : "_ZTI12IoSchedClass",
    "name" : "IoSchedClass",
-   "referenced_type" : "_ZTI12IoSchedClass",
-   "self_type" : "_ZTI12IoSchedClass",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/iosched_policy.h",
    "underlying_type" : "_ZTIj"
@@ -575,9 +526,7 @@
      "referenced_type" : "_ZTIPv"
     }
    ],
-   "referenced_type" : "_ZTIFbPvS_E",
    "return_type" : "_ZTIb",
-   "self_type" : "_ZTIFbPvS_E",
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
   {
@@ -596,9 +545,7 @@
      "referenced_type" : "_ZTIPv"
     }
    ],
-   "referenced_type" : "_ZTIFbPvS_S_E",
    "return_type" : "_ZTIb",
-   "self_type" : "_ZTIFbPvS_S_E",
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
   {
@@ -611,9 +558,7 @@
      "referenced_type" : "_ZTIPv"
     }
    ],
-   "referenced_type" : "_ZTIFiPvE",
    "return_type" : "_ZTIi",
-   "self_type" : "_ZTIFiPvE",
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
   {
@@ -632,9 +577,7 @@
      "referenced_type" : "_ZTIPv"
     }
    ],
-   "referenced_type" : "_ZTIFvPKcS0_PvE",
    "return_type" : "_ZTIv",
-   "self_type" : "_ZTIFvPKcS0_PvE",
    "source_file" : "system/core/libcutils/include/cutils/properties.h"
   }
  ],
@@ -2266,6 +2209,33 @@
    "return_type" : "_ZTIPc",
    "source_file" : "system/core/libcutils/include/cutils/str_parms.h"
   },
+  {
+   "function_name" : "uevent_bind",
+   "linker_set_key" : "uevent_bind",
+   "parameters" :
+   [
+    {
+     "referenced_type" : "_ZTIi"
+    }
+   ],
+   "return_type" : "_ZTIi",
+   "source_file" : "system/core/libcutils/include/cutils/uevent.h"
+  },
+  {
+   "function_name" : "uevent_create_socket",
+   "linker_set_key" : "uevent_create_socket",
+   "parameters" :
+   [
+    {
+     "referenced_type" : "_ZTIi"
+    },
+    {
+     "referenced_type" : "_ZTIb"
+    }
+   ],
+   "return_type" : "_ZTIi",
+   "source_file" : "system/core/libcutils/include/cutils/uevent.h"
+  },
   {
    "function_name" : "uevent_kernel_multicast_recv",
    "linker_set_key" : "uevent_kernel_multicast_recv",
@@ -2374,7 +2344,6 @@
    "linker_set_key" : "_ZTIP12IoSchedClass",
    "name" : "IoSchedClass *",
    "referenced_type" : "_ZTI12IoSchedClass",
-   "self_type" : "_ZTIP12IoSchedClass",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/iosched_policy.h"
   },
@@ -2383,7 +2352,6 @@
    "linker_set_key" : "_ZTIP12RecordStream",
    "name" : "RecordStream *",
    "referenced_type" : "_ZTI12RecordStream",
-   "self_type" : "_ZTIP12RecordStream",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/record_stream.h"
   },
@@ -2392,7 +2360,6 @@
    "linker_set_key" : "_ZTIP13native_handle",
    "name" : "native_handle *",
    "referenced_type" : "_ZTI13native_handle",
-   "self_type" : "_ZTIP13native_handle",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/native_handle.h"
   },
@@ -2401,7 +2368,6 @@
    "linker_set_key" : "_ZTIP5cnode",
    "name" : "cnode *",
    "referenced_type" : "_ZTI5cnode",
-   "self_type" : "_ZTIP5cnode",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/config_utils.h"
   },
@@ -2410,7 +2376,6 @@
    "linker_set_key" : "_ZTIP7Hashmap",
    "name" : "Hashmap *",
    "referenced_type" : "_ZTI7Hashmap",
-   "self_type" : "_ZTIP7Hashmap",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
@@ -2419,7 +2384,6 @@
    "linker_set_key" : "_ZTIP9fs_config",
    "name" : "fs_config *",
    "referenced_type" : "_ZTI9fs_config",
-   "self_type" : "_ZTIP9fs_config",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/private/fs_config.h"
   },
@@ -2428,7 +2392,6 @@
    "linker_set_key" : "_ZTIP9str_parms",
    "name" : "str_parms *",
    "referenced_type" : "_ZTI9str_parms",
-   "self_type" : "_ZTIP9str_parms",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/str_parms.h"
   },
@@ -2437,7 +2400,6 @@
    "linker_set_key" : "_ZTIPFbPvS_E",
    "name" : "bool (*)(void *, void *)",
    "referenced_type" : "_ZTIFbPvS_E",
-   "self_type" : "_ZTIPFbPvS_E",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
@@ -2446,7 +2408,6 @@
    "linker_set_key" : "_ZTIPFbPvS_S_E",
    "name" : "bool (*)(void *, void *, void *)",
    "referenced_type" : "_ZTIFbPvS_S_E",
-   "self_type" : "_ZTIPFbPvS_S_E",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
@@ -2455,7 +2416,6 @@
    "linker_set_key" : "_ZTIPFiPvE",
    "name" : "int (*)(void *)",
    "referenced_type" : "_ZTIFiPvE",
-   "self_type" : "_ZTIPFiPvE",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
@@ -2464,7 +2424,6 @@
    "linker_set_key" : "_ZTIPFvPKcS0_PvE",
    "name" : "void (*)(const char *, const char *, void *)",
    "referenced_type" : "_ZTIFvPKcS0_PvE",
-   "self_type" : "_ZTIPFvPKcS0_PvE",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/properties.h"
   },
@@ -2473,7 +2432,6 @@
    "linker_set_key" : "_ZTIPK13native_handle",
    "name" : "const native_handle *",
    "referenced_type" : "_ZTIK13native_handle",
-   "self_type" : "_ZTIPK13native_handle",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/native_handle.h"
   },
@@ -2482,7 +2440,6 @@
    "linker_set_key" : "_ZTIPK22cutils_socket_buffer_t",
    "name" : "const cutils_socket_buffer_t *",
    "referenced_type" : "_ZTIK22cutils_socket_buffer_t",
-   "self_type" : "_ZTIPK22cutils_socket_buffer_t",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/sockets.h"
   },
@@ -2491,7 +2448,6 @@
    "linker_set_key" : "_ZTIPK5iovec",
    "name" : "const iovec *",
    "referenced_type" : "_ZTIK5iovec",
-   "self_type" : "_ZTIPK5iovec",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/klog.h"
   },
@@ -2500,7 +2456,6 @@
    "linker_set_key" : "_ZTIPKc",
    "name" : "const char *",
    "referenced_type" : "_ZTIKc",
-   "self_type" : "_ZTIPKc",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/config_utils.h"
   },
@@ -2509,7 +2464,6 @@
    "linker_set_key" : "_ZTIPKv",
    "name" : "const void *",
    "referenced_type" : "_ZTIKv",
-   "self_type" : "_ZTIPKv",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/sockets.h"
   },
@@ -2518,7 +2472,6 @@
    "linker_set_key" : "_ZTIPPv",
    "name" : "void **",
    "referenced_type" : "_ZTIPv",
-   "self_type" : "_ZTIPPv",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/record_stream.h"
   },
@@ -2527,7 +2480,6 @@
    "linker_set_key" : "_ZTIPc",
    "name" : "char *",
    "referenced_type" : "_ZTIc",
-   "self_type" : "_ZTIPc",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/config_utils.h"
   },
@@ -2536,7 +2488,6 @@
    "linker_set_key" : "_ZTIPf",
    "name" : "float *",
    "referenced_type" : "_ZTIf",
-   "self_type" : "_ZTIPf",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/str_parms.h"
   },
@@ -2545,7 +2496,6 @@
    "linker_set_key" : "_ZTIPi",
    "name" : "int *",
    "referenced_type" : "_ZTIi",
-   "self_type" : "_ZTIPi",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/iosched_policy.h"
   },
@@ -2554,7 +2504,6 @@
    "linker_set_key" : "_ZTIPj",
    "name" : "unsigned int *",
    "referenced_type" : "_ZTIj",
-   "self_type" : "_ZTIPj",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/misc.h"
   },
@@ -2563,7 +2512,6 @@
    "linker_set_key" : "_ZTIPm",
    "name" : "unsigned long *",
    "referenced_type" : "_ZTIm",
-   "self_type" : "_ZTIPm",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/record_stream.h"
   },
@@ -2572,7 +2520,6 @@
    "linker_set_key" : "_ZTIPv",
    "name" : "void *",
    "referenced_type" : "_ZTIv",
-   "self_type" : "_ZTIPv",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/misc.h"
   }
@@ -2585,7 +2532,6 @@
    "linker_set_key" : "_ZTIK13native_handle",
    "name" : "const native_handle",
    "referenced_type" : "_ZTI13native_handle",
-   "self_type" : "_ZTIK13native_handle",
    "size" : 12,
    "source_file" : "system/core/libcutils/include/cutils/native_handle.h"
   },
@@ -2595,7 +2541,6 @@
    "linker_set_key" : "_ZTIK22cutils_socket_buffer_t",
    "name" : "const cutils_socket_buffer_t",
    "referenced_type" : "_ZTI22cutils_socket_buffer_t",
-   "self_type" : "_ZTIK22cutils_socket_buffer_t",
    "size" : 16,
    "source_file" : "system/core/libcutils/include/cutils/sockets.h"
   },
@@ -2605,7 +2550,6 @@
    "linker_set_key" : "_ZTIK5iovec",
    "name" : "const iovec",
    "referenced_type" : "_ZTI5iovec",
-   "self_type" : "_ZTIK5iovec",
    "size" : 16,
    "source_file" : "system/core/libcutils/include/cutils/klog.h"
   },
@@ -2615,7 +2559,6 @@
    "linker_set_key" : "_ZTIKc",
    "name" : "const char",
    "referenced_type" : "_ZTIc",
-   "self_type" : "_ZTIKc",
    "size" : 1,
    "source_file" : "system/core/libcutils/include/cutils/config_utils.h"
   },
@@ -2624,7 +2567,6 @@
    "linker_set_key" : "_ZTIKv",
    "name" : "const void",
    "referenced_type" : "_ZTIv",
-   "self_type" : "_ZTIKv",
    "source_file" : "system/core/libcutils/include/cutils/sockets.h"
   }
  ],
@@ -2656,8 +2598,6 @@
    ],
    "linker_set_key" : "_ZTI13native_handle",
    "name" : "native_handle",
-   "referenced_type" : "_ZTI13native_handle",
-   "self_type" : "_ZTI13native_handle",
    "size" : 12,
    "source_file" : "system/core/libcutils/include/cutils/native_handle.h"
   },
@@ -2677,8 +2617,6 @@
    ],
    "linker_set_key" : "_ZTI22cutils_socket_buffer_t",
    "name" : "cutils_socket_buffer_t",
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    "size" : 16,
    "source_file" : "system/core/libcutils/include/cutils/sockets.h"
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@@ -2713,8 +2651,6 @@
    ],
    "linker_set_key" : "_ZTI5cnode",
    "name" : "cnode",
-   "referenced_type" : "_ZTI5cnode",
-   "self_type" : "_ZTI5cnode",
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    "source_file" : "system/core/libcutils/include/cutils/config_utils.h"
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@@ -2744,8 +2680,6 @@
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-   "self_type" : "_ZTI9fs_config",
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   }
diff --git a/libcutils/abi-dumps/arm_arm64/source-based/libcutils.so.lsdump b/libcutils/abi-dumps/arm_arm64/source-based/libcutils.so.lsdump
index f75240c04..fe4361a39 100644
--- a/libcutils/abi-dumps/arm_arm64/source-based/libcutils.so.lsdump
+++ b/libcutils/abi-dumps/arm_arm64/source-based/libcutils.so.lsdump
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    "referenced_type" : "_ZTIi",
-   "self_type" : "_ZTIA0_i",
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   }
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@@ -17,8 +16,6 @@
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    "name" : "signed char",
-   "referenced_type" : "_ZTIa",
-   "self_type" : "_ZTIa",
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   },
   {
@@ -27,8 +24,6 @@
    "is_unsigned" : true,
    "linker_set_key" : "_ZTIb",
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-   "self_type" : "_ZTIb",
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@@ -37,25 +32,27 @@
    "is_unsigned" : true,
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-   "self_type" : "_ZTIc",
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   },
   {
    "alignment" : 4,
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    "name" : "float",
-   "referenced_type" : "_ZTIf",
-   "self_type" : "_ZTIf",
    "size" : 4
   },
+  {
+   "alignment" : 1,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIh",
+   "name" : "unsigned char",
+   "size" : 1
+  },
   {
    "alignment" : 4,
    "is_integral" : true,
    "linker_set_key" : "_ZTIi",
    "name" : "int",
-   "referenced_type" : "_ZTIi",
-   "self_type" : "_ZTIi",
    "size" : 4
   },
   {
@@ -64,33 +61,47 @@
    "is_unsigned" : true,
    "linker_set_key" : "_ZTIj",
    "name" : "unsigned int",
-   "referenced_type" : "_ZTIj",
-   "self_type" : "_ZTIj",
    "size" : 4
   },
+  {
+   "alignment" : 4,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIl",
+   "name" : "long",
+   "size" : 4
+  },
+  {
+   "alignment" : 4,
+   "is_integral" : true,
+   "is_unsigned" : true,
+   "linker_set_key" : "_ZTIm",
+   "name" : "unsigned long",
+   "size" : 4
+  },
+  {
+   "alignment" : 2,
+   "is_integral" : true,
+   "linker_set_key" : "_ZTIs",
+   "name" : "short",
+   "size" : 2
+  },
   {
    "alignment" : 2,
    "is_integral" : true,
    "is_unsigned" : true,
    "linker_set_key" : "_ZTIt",
    "name" : "unsigned short",
-   "referenced_type" : "_ZTIt",
-   "self_type" : "_ZTIt",
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   {
    "linker_set_key" : "_ZTIv",
-   "name" : "void",
-   "referenced_type" : "_ZTIv",
-   "self_type" : "_ZTIv"
+   "name" : "void"
   },
   {
    "alignment" : 8,
    "is_integral" : true,
    "linker_set_key" : "_ZTIx",
    "name" : "long long",
-   "referenced_type" : "_ZTIx",
-   "self_type" : "_ZTIx",
    "size" : 8
   },
   {
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    "is_unsigned" : true,
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    "name" : "unsigned long long",
-   "referenced_type" : "_ZTIy",
-   "self_type" : "_ZTIy",
    "size" : 8
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@@ -113,66 +122,6 @@
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    "name" : "_ZN7android4base4TrimIRNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEEEES8_OT_"
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-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE4syncEv"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE5imbueERKNS_6localeE"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE6setbufEPci"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekoffExNS_8ios_base7seekdirEj"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekposENS_4fposI9mbstate_tEEj"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE8overflowEi"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE9pbackfailEi"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE9underflowEv"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEEC2Ev"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED0Ev"
-  },
-  {
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-   "name" : "_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEED2Ev"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__124__put_character_sequenceIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_PKS4_j"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZNSt3__16vectorI5EntryNS_9allocatorIS1_EEE24__emplace_back_slow_pathIJS1_EEEvDpOT_"
-  },
-  {
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-   "name" : "_ZNSt3__17getlineIcNS_11char_traitsIcEENS_9allocatorIcEEEERNS_13basic_istreamIT_T0_EES9_RNS_12basic_stringIS6_S7_T1_EES6_"
-  },
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-   "binding" : "weak",
-   "name" : "_ZNSt3__1lsINS_11char_traitsIcEEEERNS_13basic_ostreamIcT_EES6_PKc"
-  },
   {
    "name" : "android_get_control_file"
   },
@@ -497,6 +446,12 @@
   {
    "name" : "str_parms_to_str"
   },
+  {
+   "name" : "uevent_bind"
+  },
+  {
+   "name" : "uevent_create_socket"
+  },
   {
    "name" : "uevent_kernel_multicast_recv"
   },
@@ -512,22 +467,6 @@
  ],
  "elf_objects" :
  [
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-   "name" : "_ZTCNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE0_NS_13basic_istreamIcS2_EE"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZTTNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZTVNSt3__113basic_filebufIcNS_11char_traitsIcEEEE"
-  },
-  {
-   "binding" : "weak",
-   "name" : "_ZTVNSt3__114basic_ifstreamIcNS_11char_traitsIcEEEE"
-  },
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@@ -563,8 +502,6 @@
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-   "referenced_type" : "_ZTI12IoSchedClass",
-   "self_type" : "_ZTI12IoSchedClass",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/iosched_policy.h",
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@@ -585,9 +522,7 @@
      "referenced_type" : "_ZTIPv"
     }
    ],
-   "referenced_type" : "_ZTIFbPvS_E",
    "return_type" : "_ZTIb",
-   "self_type" : "_ZTIFbPvS_E",
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
   {
@@ -606,9 +541,7 @@
      "referenced_type" : "_ZTIPv"
     }
    ],
-   "referenced_type" : "_ZTIFbPvS_S_E",
    "return_type" : "_ZTIb",
-   "self_type" : "_ZTIFbPvS_S_E",
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
   {
@@ -621,9 +554,7 @@
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     }
    ],
-   "referenced_type" : "_ZTIFiPvE",
    "return_type" : "_ZTIi",
-   "self_type" : "_ZTIFiPvE",
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
   {
@@ -642,9 +573,7 @@
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     }
    ],
-   "referenced_type" : "_ZTIFvPKcS0_PvE",
    "return_type" : "_ZTIv",
-   "self_type" : "_ZTIFvPKcS0_PvE",
    "source_file" : "system/core/libcutils/include/cutils/properties.h"
   }
  ],
@@ -2276,6 +2205,33 @@
    "return_type" : "_ZTIPc",
    "source_file" : "system/core/libcutils/include/cutils/str_parms.h"
   },
+  {
+   "function_name" : "uevent_bind",
+   "linker_set_key" : "uevent_bind",
+   "parameters" :
+   [
+    {
+     "referenced_type" : "_ZTIi"
+    }
+   ],
+   "return_type" : "_ZTIi",
+   "source_file" : "system/core/libcutils/include/cutils/uevent.h"
+  },
+  {
+   "function_name" : "uevent_create_socket",
+   "linker_set_key" : "uevent_create_socket",
+   "parameters" :
+   [
+    {
+     "referenced_type" : "_ZTIi"
+    },
+    {
+     "referenced_type" : "_ZTIb"
+    }
+   ],
+   "return_type" : "_ZTIi",
+   "source_file" : "system/core/libcutils/include/cutils/uevent.h"
+  },
   {
    "function_name" : "uevent_kernel_multicast_recv",
    "linker_set_key" : "uevent_kernel_multicast_recv",
@@ -2384,7 +2340,6 @@
    "linker_set_key" : "_ZTIP12IoSchedClass",
    "name" : "IoSchedClass *",
    "referenced_type" : "_ZTI12IoSchedClass",
-   "self_type" : "_ZTIP12IoSchedClass",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/iosched_policy.h"
   },
@@ -2393,7 +2348,6 @@
    "linker_set_key" : "_ZTIP12RecordStream",
    "name" : "RecordStream *",
    "referenced_type" : "_ZTI12RecordStream",
-   "self_type" : "_ZTIP12RecordStream",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/record_stream.h"
   },
@@ -2402,7 +2356,6 @@
    "linker_set_key" : "_ZTIP13native_handle",
    "name" : "native_handle *",
    "referenced_type" : "_ZTI13native_handle",
-   "self_type" : "_ZTIP13native_handle",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/native_handle.h"
   },
@@ -2411,7 +2364,6 @@
    "linker_set_key" : "_ZTIP5cnode",
    "name" : "cnode *",
    "referenced_type" : "_ZTI5cnode",
-   "self_type" : "_ZTIP5cnode",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/config_utils.h"
   },
@@ -2420,7 +2372,6 @@
    "linker_set_key" : "_ZTIP7Hashmap",
    "name" : "Hashmap *",
    "referenced_type" : "_ZTI7Hashmap",
-   "self_type" : "_ZTIP7Hashmap",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
@@ -2429,7 +2380,6 @@
    "linker_set_key" : "_ZTIP9fs_config",
    "name" : "fs_config *",
    "referenced_type" : "_ZTI9fs_config",
-   "self_type" : "_ZTIP9fs_config",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/private/fs_config.h"
   },
@@ -2438,7 +2388,6 @@
    "linker_set_key" : "_ZTIP9str_parms",
    "name" : "str_parms *",
    "referenced_type" : "_ZTI9str_parms",
-   "self_type" : "_ZTIP9str_parms",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/str_parms.h"
   },
@@ -2447,7 +2396,6 @@
    "linker_set_key" : "_ZTIPFbPvS_E",
    "name" : "bool (*)(void *, void *)",
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-   "self_type" : "_ZTIPFbPvS_E",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
@@ -2456,7 +2404,6 @@
    "linker_set_key" : "_ZTIPFbPvS_S_E",
    "name" : "bool (*)(void *, void *, void *)",
    "referenced_type" : "_ZTIFbPvS_S_E",
-   "self_type" : "_ZTIPFbPvS_S_E",
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    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
@@ -2465,7 +2412,6 @@
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    "name" : "int (*)(void *)",
    "referenced_type" : "_ZTIFiPvE",
-   "self_type" : "_ZTIPFiPvE",
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    "source_file" : "system/core/libcutils/include/cutils/hashmap.h"
   },
@@ -2474,7 +2420,6 @@
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    "name" : "void (*)(const char *, const char *, void *)",
    "referenced_type" : "_ZTIFvPKcS0_PvE",
-   "self_type" : "_ZTIPFvPKcS0_PvE",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/properties.h"
   },
@@ -2483,7 +2428,6 @@
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    "referenced_type" : "_ZTIK13native_handle",
-   "self_type" : "_ZTIPK13native_handle",
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   },
@@ -2492,7 +2436,6 @@
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    "name" : "const iovec *",
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    "source_file" : "system/core/libcutils/include/cutils/klog.h"
   },
@@ -2510,7 +2452,6 @@
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    "name" : "const char *",
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    "name" : "void **",
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   },
@@ -2546,7 +2484,6 @@
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    "name" : "float *",
    "referenced_type" : "_ZTIf",
-   "self_type" : "_ZTIPf",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/str_parms.h"
   },
@@ -2555,7 +2492,6 @@
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    "name" : "int *",
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-   "self_type" : "_ZTIPi",
    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/iosched_policy.h"
   },
@@ -2564,7 +2500,6 @@
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    "name" : "unsigned int *",
    "referenced_type" : "_ZTIj",
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    "size" : 4,
    "source_file" : "system/core/libcutils/include/cutils/misc.h"
   },
@@ -2573,7 +2508,6 @@
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    "name" : "void *",
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   },
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@@ -2595,7 +2528,6 @@
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@@ -2605,7 +2537,6 @@
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   },
@@ -2615,7 +2546,6 @@
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   },
@@ -2625,7 +2555,6 @@
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    "referenced_type" : "_ZTIc",
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   },
@@ -2634,7 +2563,6 @@
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    "referenced_type" : "_ZTIv",
-   "self_type" : "_ZTIKv",
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   }
  ],
@@ -2666,8 +2594,6 @@
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   },
@@ -2687,8 +2613,6 @@
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-   "referenced_type" : "_ZTI22cutils_socket_buffer_t",
-   "self_type" : "_ZTI22cutils_socket_buffer_t",
    "size" : 8,
    "source_file" : "system/core/libcutils/include/cutils/sockets.h"
   },
@@ -2723,8 +2647,6 @@
    ],
    "linker_set_key" : "_ZTI5cnode",
    "name" : "cnode",
-   "referenced_type" : "_ZTI5cnode",
-   "self_type" : "_ZTI5cnode",
    "size" : 20,
    "source_file" : "system/core/libcutils/include/cutils/config_utils.h"
   },
@@ -2754,8 +2676,6 @@
    ],
    "linker_set_key" : "_ZTI9fs_config",
    "name" : "fs_config",
-   "referenced_type" : "_ZTI9fs_config",
-   "self_type" : "_ZTI9fs_config",
    "size" : 24,
    "source_file" : "system/core/libcutils/include/private/fs_config.h"
   }
diff --git a/libcutils/include/cutils/uevent.h b/libcutils/include/cutils/uevent.h
index da1c2aae6..1be981bf0 100644
--- a/libcutils/include/cutils/uevent.h
+++ b/libcutils/include/cutils/uevent.h
@@ -24,6 +24,8 @@
 extern "C" {
 #endif
 
+int uevent_create_socket(int buf_sz, bool passcred);
+int uevent_bind(int socket);
 int uevent_open_socket(int buf_sz, bool passcred);
 ssize_t uevent_kernel_multicast_recv(int socket, void *buffer, size_t length);
 ssize_t uevent_kernel_multicast_uid_recv(int socket, void *buffer, size_t length, uid_t *uid);
diff --git a/libcutils/uevent.cpp b/libcutils/uevent.cpp
index 40bbd5c8f..f01a479cd 100644
--- a/libcutils/uevent.cpp
+++ b/libcutils/uevent.cpp
@@ -92,20 +92,22 @@ out:
     return -1;
 }
 
-int uevent_open_socket(int buf_sz, bool passcred) {
-    struct sockaddr_nl addr;
-    int on = passcred;
+/*
+ * Creates an unbound netlink socket for receiving uevent messages.
+ * @buf_sz: socket receive buffer size.
+ * @passcred: whether or not to enable receiving the SCM_CREDENTIALS control
+ *	message.
+ *
+ * Returns: a socket descriptor upon success or -1 upon failure.
+ */
+int uevent_create_socket(int buf_sz, bool passcred) {
+    int s = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_KOBJECT_UEVENT);
+    if (s < 0) {
+        return -1;
+    }
+
     int buf_sz_readback = 0;
     socklen_t optlen = sizeof(buf_sz_readback);
-    int s;
-
-    memset(&addr, 0, sizeof(addr));
-    addr.nl_family = AF_NETLINK;
-    addr.nl_pid = 0;
-    addr.nl_groups = 0xffffffff;
-
-    s = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_KOBJECT_UEVENT);
-    if (s < 0) return -1;
 
     if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &buf_sz, sizeof(buf_sz)) < 0 ||
           getsockopt(s, SOL_SOCKET, SO_RCVBUF, &buf_sz_readback, &optlen) < 0) {
@@ -123,9 +125,43 @@ int uevent_open_socket(int buf_sz, bool passcred) {
         }
     }
 
+    int on = passcred;
+
     setsockopt(s, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));
 
-    if (bind(s, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+    return s;
+}
+
+/*
+ * Binds a netlink socket. Binding a netlink socket makes the kernel start
+ * sending netlink messages to that netlink socket.
+ *
+ * Returns: 0 upon success; -1 upon error.
+ */
+int uevent_bind(int socket) {
+    struct sockaddr_nl addr = {
+            .nl_family = AF_NETLINK,
+            .nl_pid = 0,
+            .nl_groups = 0xffffffff,
+    };
+    return bind(socket, (struct sockaddr*)&addr, sizeof(addr));
+}
+
+/*
+ * Creates a bound netlink socket for receiving uevent messages.
+ * @buf_sz: socket receive buffer size.
+ * @passcred: whether or not to enable receiving the SCM_CREDENTIALS control
+ *	message.
+ *
+ * Returns: a socket descriptor upon success or -1 upon failure.
+ */
+int uevent_open_socket(int buf_sz, bool passcred) {
+    int s = uevent_create_socket(buf_sz, passcred);
+    if (s < 0) {
+        return -1;
+    }
+
+    if (uevent_bind(s) < 0) {
         close(s);
         return -1;
     }