Write greylist annotation metadata to a csv file.

Also add support for merging these into a single file elsewhere in the
build.

Test: m, inspect generated greylist.csv
Bug: 117314178
Change-Id: If28110fc1ed090222e55c274e8363110753d10f1
diff --git a/core/config.mk b/core/config.mk
index b9174b3..f5973c5 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -1169,6 +1169,7 @@
 INTERNAL_PLATFORM_HIDDENAPI_LIGHT_GREYLIST := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/hiddenapi-light-greylist.txt
 INTERNAL_PLATFORM_HIDDENAPI_DARK_GREYLIST := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/hiddenapi-dark-greylist.txt
 INTERNAL_PLATFORM_HIDDENAPI_BLACKLIST := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/hiddenapi-blacklist.txt
+INTERNAL_PLATFORM_HIDDENAPI_GREYLIST_METADATA := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/hiddenapi-greylist.csv
 
 # Missing optional uses-libraries so that the platform doesn't create build rules that depend on
 # them. See setup_one_odex.mk.
diff --git a/core/definitions.mk b/core/definitions.mk
index 5a14826..3538166 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2708,12 +2708,20 @@
 	    --write-greylist $(3) \
 	    --write-greylist 26,28:$(4)
 
+$(5): $(1) $(CLASS2GREYLIST) $(INTERNAL_PLATFORM_HIDDENAPI_PUBLIC_LIST)
+	$(CLASS2GREYLIST) --public-api-list $(INTERNAL_PLATFORM_HIDDENAPI_PUBLIC_LIST) $(1) \
+	    --write-metadata-csv $(5)
+
 $(INTERNAL_PLATFORM_HIDDENAPI_WHITELIST): $(2) $(3) $(4)
 $(INTERNAL_PLATFORM_HIDDENAPI_WHITELIST): \
     PRIVATE_WHITELIST_INPUTS := $$(PRIVATE_WHITELIST_INPUTS) $(2)
 $(INTERNAL_PLATFORM_HIDDENAPI_WHITELIST): \
     PRIVATE_GREYLIST_INPUTS := $$(PRIVATE_GREYLIST_INPUTS) $(3)
     PRIVATE_DARKGREYLIST_INPUTS := $$(PRIVATE_DARKGREYLIST_INPUTS) $(4)
+$(INTERNAL_PLATFORM_HIDDENAPI_GREYLIST_METADATA): $(5)
+$(INTERNAL_PLATFORM_HIDDENAPI_GREYLIST_METADATA): \
+    PRIVATE_METADATA_INPUTS := $$(PRIVATE_METADATA_INPUTS) $(5)
+
 endif
 endef
 
diff --git a/core/java.mk b/core/java.mk
index c015e4a..30571b7 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -77,6 +77,7 @@
 hiddenapi_whitelist_txt := $(intermediates.COMMON)/hiddenapi/whitelist.txt
 hiddenapi_greylist_txt := $(intermediates.COMMON)/hiddenapi/greylist.txt
 hiddenapi_darkgreylist_txt := $(intermediates.COMMON)/hiddenapi/darkgreylist.txt
+hiddenapi_greylist_metadata_csv := $(intermediates.COMMON)/hiddenapi/greylist.csv
 
 ifeq ($(LOCAL_MODULE_CLASS)$(LOCAL_SRC_FILES)$(LOCAL_STATIC_JAVA_LIBRARIES)$(LOCAL_SOURCE_FILES_ALL_GENERATED),APPS)
 # If this is an apk without any Java code (e.g. framework-res), we should skip compiling Java.
@@ -507,8 +508,8 @@
   # dex later on. The difference is academic currently, as we don't proguard any
   # bootclasspath code at the moment. If we were to do that, we should add keep
   # rules for all members with the @UnsupportedAppUsage annotation.
-  $(eval $(call hiddenapi-generate-greylist-txt, $(full_classes_pre_proguard_jar),$(hiddenapi_whitelist_txt),$(hiddenapi_greylist_txt),$(hiddenapi_darkgreylist_txt)))
-  LOCAL_INTERMEDIATE_TARGETS += $(hiddenapi_whitelist_txt) $(hiddenapi_greylist_txt) $(hiddenapi_darkgreylist_txt)
+  $(eval $(call hiddenapi-generate-greylist-txt, $(full_classes_pre_proguard_jar),$(hiddenapi_whitelist_txt),$(hiddenapi_greylist_txt),$(hiddenapi_darkgreylist_txt),$(hiddenapi_greylist_metadata_csv)))
+  LOCAL_INTERMEDIATE_TARGETS += $(hiddenapi_whitelist_txt) $(hiddenapi_greylist_txt) $(hiddenapi_darkgreylist_txt) $(hiddenapi_greylist_metadata_csv)
   $(eval $(call hiddenapi-copy-dex-files,$(built_dex_intermediate),$(built_dex_hiddenapi)))
   built_dex_copy_from := $(built_dex_hiddenapi)
 else # !is_boot_jar
diff --git a/core/soong_java_prebuilt.mk b/core/soong_java_prebuilt.mk
index 18a09fb..20bfc66 100644
--- a/core/soong_java_prebuilt.mk
+++ b/core/soong_java_prebuilt.mk
@@ -22,6 +22,7 @@
 hiddenapi_whitelist_txt := $(intermediates.COMMON)/hiddenapi/whitelist.txt
 hiddenapi_greylist_txt := $(intermediates.COMMON)/hiddenapi/greylist.txt
 hiddenapi_darkgreylist_txt := $(intermediates.COMMON)/hiddenapi/darkgreylist.txt
+hiddenapi_greylist_metadata_csv := $(intermediates.COMMON)/hiddenapi/greylist.csv
 
 $(eval $(call copy-one-file,$(LOCAL_PREBUILT_MODULE_FILE),$(full_classes_jar)))
 $(eval $(call copy-one-file,$(LOCAL_PREBUILT_MODULE_FILE),$(full_classes_pre_proguard_jar)))
@@ -79,7 +80,7 @@
         # We use full_classes_jar here, which is the post-proguard jar (on the basis that we also
         # have a full_classes_pre_proguard_jar). This is consistent with the equivalent code in
         # java.mk.
-        $(eval $(call hiddenapi-generate-greylist-txt,$(full_classes_jar),$(hiddenapi_whitelist_txt),$(hiddenapi_greylist_txt),$(hiddenapi_darkgreylist_txt)))
+        $(eval $(call hiddenapi-generate-greylist-txt,$(full_classes_jar),$(hiddenapi_whitelist_txt),$(hiddenapi_greylist_txt),$(hiddenapi_darkgreylist_txt),$(hiddenapi_greylist_metadata_csv)))
         $(eval $(call hiddenapi-copy-soong-jar,$(LOCAL_SOONG_DEX_JAR),$(common_javalib.jar)))
       else # !is_boot_jar
         $(eval $(call copy-one-file,$(LOCAL_SOONG_DEX_JAR),$(common_javalib.jar)))