Permissions for odrefresh and /data/misc/apexdata/com.android.art
odrefresh is the process responsible for checking and creating ART
compilation artifacts that live in the ART APEX data
directory (/data/misc/apexdata/com.android.art).
There are two types of change here:
1) enabling odrefresh to run dex2oat and write updated boot class path
and system server AOT artifacts into the ART APEX data directory.
2) enabling the zygote and assorted diagnostic tools to use the
updated AOT artifacts.
odrefresh uses two file contexts: apex_art_data_file and
apex_art_staging_data_file. When odrefresh invokes dex2oat, the
generated files have the apex_art_staging_data_file label (which allows
writing). odrefresh then moves these files from the staging area to
their installation area and gives them the apex_art_data_file label.
Bug: 160683548
Test: adb root && adb shell /apex/com.android.art/bin/odrefresh
Change-Id: I9fa290e0c9c1b7b82be4dacb9f2f8cb8c11e4895
diff --git a/private/dex2oat.te b/private/dex2oat.te
index 50e43ad..27e4b0c 100644
--- a/private/dex2oat.te
+++ b/private/dex2oat.te
@@ -32,6 +32,21 @@
# the framework.
allow dex2oat { privapp_data_file app_data_file }:file { getattr read write lock map };
+# Allow dex2oat to find files and directories under /data/misc/apexdata/com.android.runtime.
+allow dex2oat apex_module_data_file:dir search;
+
+# Allow dex2oat to use file descriptors passed from odrefresh.
+allow dex2oat odrefresh:fd use;
+
+# Allow dex2oat to write to file descriptors from odrefresh for files
+# in the staging area.
+allow dex2oat apex_art_staging_data_file:dir r_dir_perms;
+allow dex2oat apex_art_staging_data_file:file { getattr map read write unlink };
+
+# Allow dex2oat to read artifacts from odrefresh.
+allow dex2oat apex_art_data_file:dir r_dir_perms;
+allow dex2oat apex_art_data_file:file r_file_perms;
+
##################
# A/B OTA Dexopt #
##################