Merge "Revert "Add system staging dir stamp file for bazel sandwich"" into main
diff --git a/core/config.mk b/core/config.mk
index 920e457..e919be3 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -436,11 +436,25 @@
   TARGET_MAX_PAGE_SIZE_SUPPORTED := 4096
   # When VSR vendor API level >= 34, binary alignment will be 65536.
   ifeq ($(call math_gt_or_eq,$(vsr_vendor_api_level),34),true)
+    ifeq ($(TARGET_ARCH),arm64)
       TARGET_MAX_PAGE_SIZE_SUPPORTED := 65536
+    endif
+    ifeq ($(TARGET_ARCH),arm)
+      TARGET_MAX_PAGE_SIZE_SUPPORTED := 65536
+    endif
   endif
 endif
 .KATI_READONLY := TARGET_MAX_PAGE_SIZE_SUPPORTED
 
+# Check that TARGET_MAX_PAGE_SIZE_SUPPORTED is greater than 4096 only for ARM arch.
+ifneq ($(TARGET_MAX_PAGE_SIZE_SUPPORTED),4096)
+  ifneq ($(TARGET_ARCH),arm64)
+    ifneq ($(TARGET_ARCH),arm)
+      $(error TARGET_MAX_PAGE_SIZE_SUPPORTED=$(TARGET_MAX_PAGE_SIZE_SUPPORTED) is greater than 4096. Only supported in ARM arch)
+    endif
+  endif
+endif
+
 # Boolean variable determining if AOSP is page size agnostic. This means
 # that AOSP can use a kernel configured with 4k/16k/64k PAGE SIZES.
 TARGET_PAGE_SIZE_AGNOSTIC := false
diff --git a/core/soong_config.mk b/core/soong_config.mk
index f150660..bd6cfbb 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -40,6 +40,7 @@
 $(call add_json_str,  Platform_base_os,                  $(PLATFORM_BASE_OS))
 $(call add_json_str,  Platform_version_last_stable,      $(PLATFORM_VERSION_LAST_STABLE))
 $(call add_json_str,  Platform_version_known_codenames,  $(PLATFORM_VERSION_KNOWN_CODENAMES))
+$(call add_json_bool, Release_aidl_use_unfrozen,         $(RELEASE_AIDL_USE_UNFROZEN))
 
 $(call add_json_str,  Platform_min_supported_target_sdk_version, $(PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION))
 
diff --git a/tools/aconfig/src/commands.rs b/tools/aconfig/src/commands.rs
index 4f0a706..bd09e24 100644
--- a/tools/aconfig/src/commands.rs
+++ b/tools/aconfig/src/commands.rs
@@ -35,8 +35,15 @@
 impl Input {
     fn try_parse_flags(&mut self) -> Result<ProtoParsedFlags> {
         let mut buffer = Vec::new();
-        self.reader.read_to_end(&mut buffer)?;
+        self.reader
+            .read_to_end(&mut buffer)
+            .with_context(|| format!("failed to read {}", self.source))?;
         crate::protos::parsed_flags::try_from_binary_proto(&buffer)
+            .with_context(|| self.error_context())
+    }
+
+    fn error_context(&self) -> String {
+        format!("failed to parse {}", self.source)
     }
 }
 
@@ -53,20 +60,23 @@
 
     for mut input in declarations {
         let mut contents = String::new();
-        input.reader.read_to_string(&mut contents)?;
+        input
+            .reader
+            .read_to_string(&mut contents)
+            .with_context(|| format!("failed to read {}", input.source))?;
 
         let flag_declarations = crate::protos::flag_declarations::try_from_text_proto(&contents)
-            .with_context(|| format!("Failed to parse {}", input.source))?;
+            .with_context(|| input.error_context())?;
         ensure!(
             package == flag_declarations.package(),
-            "Failed to parse {}: expected package {}, got {}",
+            "failed to parse {}: expected package {}, got {}",
             input.source,
             package,
             flag_declarations.package()
         );
         for mut flag_declaration in flag_declarations.flag.into_iter() {
             crate::protos::flag_declaration::verify_fields(&flag_declaration)
-                .with_context(|| format!("Failed to parse {}", input.source))?;
+                .with_context(|| input.error_context())?;
 
             // create ParsedFlag using FlagDeclaration and default values
             let mut parsed_flag = ProtoParsedFlag::new();
@@ -101,12 +111,15 @@
 
     for mut input in values {
         let mut contents = String::new();
-        input.reader.read_to_string(&mut contents)?;
+        input
+            .reader
+            .read_to_string(&mut contents)
+            .with_context(|| format!("failed to read {}", input.source))?;
         let flag_values = crate::protos::flag_values::try_from_text_proto(&contents)
-            .with_context(|| format!("Failed to parse {}", input.source))?;
+            .with_context(|| input.error_context())?;
         for flag_value in flag_values.flag_value.into_iter() {
             crate::protos::flag_value::verify_fields(&flag_value)
-                .with_context(|| format!("Failed to parse {}", input.source))?;
+                .with_context(|| input.error_context())?;
 
             let Some(parsed_flag) = parsed_flags
                 .parsed_flag
diff --git a/tools/aconfig/src/main.rs b/tools/aconfig/src/main.rs
index 151cbe8..920b761 100644
--- a/tools/aconfig/src/main.rs
+++ b/tools/aconfig/src/main.rs
@@ -16,7 +16,7 @@
 
 //! `aconfig` is a build time tool to manage build time configurations, such as feature flags.
 
-use anyhow::{anyhow, bail, ensure, Result};
+use anyhow::{anyhow, bail, Context, Result};
 use clap::{builder::ArgAction, builder::EnumValueParser, Arg, ArgMatches, Command};
 use core::any::Any;
 use std::fs;
@@ -129,26 +129,27 @@
 }
 
 fn write_output_file_realtive_to_dir(root: &Path, output_file: &OutputFile) -> Result<()> {
-    ensure!(
-        root.is_dir(),
-        "output directory {} does not exist or is not a directory",
-        root.display()
-    );
     let path = root.join(output_file.path.clone());
     let parent = path
         .parent()
         .ok_or(anyhow!("unable to locate parent of output file {}", path.display()))?;
-    fs::create_dir_all(parent)?;
-    let mut file = fs::File::create(path)?;
-    file.write_all(&output_file.contents)?;
+    fs::create_dir_all(parent)
+        .with_context(|| format!("failed to create directory {}", parent.display()))?;
+    let mut file = fs::File::create(path.clone())
+        .with_context(|| format!("failed to open {}", path.display()))?;
+    file.write_all(&output_file.contents)
+        .with_context(|| format!("failed to write to {}", path.display()))?;
     Ok(())
 }
 
 fn write_output_to_file_or_stdout(path: &str, data: &[u8]) -> Result<()> {
     if path == "-" {
-        io::stdout().write_all(data)?;
+        io::stdout().write_all(data).context("failed to write to stdout")?;
     } else {
-        fs::File::create(path)?.write_all(data)?;
+        fs::File::create(path)
+            .with_context(|| format!("failed to open {}", path))?
+            .write_all(data)
+            .with_context(|| format!("failed to write to {}", path))?;
     }
     Ok(())
 }
@@ -160,14 +161,16 @@
             let package = get_required_arg::<String>(sub_matches, "package")?;
             let declarations = open_zero_or_more_files(sub_matches, "declarations")?;
             let values = open_zero_or_more_files(sub_matches, "values")?;
-            let output = commands::parse_flags(package, declarations, values)?;
+            let output = commands::parse_flags(package, declarations, values)
+                .context("failed to create cache")?;
             let path = get_required_arg::<String>(sub_matches, "cache")?;
             write_output_to_file_or_stdout(path, &output)?;
         }
         Some(("create-java-lib", sub_matches)) => {
             let cache = open_single_file(sub_matches, "cache")?;
             let mode = get_required_arg::<CodegenMode>(sub_matches, "mode")?;
-            let generated_files = commands::create_java_lib(cache, *mode)?;
+            let generated_files =
+                commands::create_java_lib(cache, *mode).context("failed to create java lib")?;
             let dir = PathBuf::from(get_required_arg::<String>(sub_matches, "out")?);
             generated_files
                 .iter()
@@ -176,7 +179,8 @@
         Some(("create-cpp-lib", sub_matches)) => {
             let cache = open_single_file(sub_matches, "cache")?;
             let mode = get_required_arg::<CodegenMode>(sub_matches, "mode")?;
-            let generated_files = commands::create_cpp_lib(cache, *mode)?;
+            let generated_files =
+                commands::create_cpp_lib(cache, *mode).context("failed to create cpp lib")?;
             let dir = PathBuf::from(get_required_arg::<String>(sub_matches, "out")?);
             generated_files
                 .iter()
@@ -185,25 +189,29 @@
         Some(("create-rust-lib", sub_matches)) => {
             let cache = open_single_file(sub_matches, "cache")?;
             let mode = get_required_arg::<CodegenMode>(sub_matches, "mode")?;
-            let generated_file = commands::create_rust_lib(cache, *mode)?;
+            let generated_file =
+                commands::create_rust_lib(cache, *mode).context("failed to create rust lib")?;
             let dir = PathBuf::from(get_required_arg::<String>(sub_matches, "out")?);
             write_output_file_realtive_to_dir(&dir, &generated_file)?;
         }
         Some(("create-device-config-defaults", sub_matches)) => {
             let cache = open_single_file(sub_matches, "cache")?;
-            let output = commands::create_device_config_defaults(cache)?;
+            let output = commands::create_device_config_defaults(cache)
+                .context("failed to create device config defaults")?;
             let path = get_required_arg::<String>(sub_matches, "out")?;
             write_output_to_file_or_stdout(path, &output)?;
         }
         Some(("create-device-config-sysprops", sub_matches)) => {
             let cache = open_single_file(sub_matches, "cache")?;
-            let output = commands::create_device_config_sysprops(cache)?;
+            let output = commands::create_device_config_sysprops(cache)
+                .context("failed to create device config sysprops")?;
             let path = get_required_arg::<String>(sub_matches, "out")?;
             write_output_to_file_or_stdout(path, &output)?;
         }
         Some(("dump", sub_matches)) => {
             let input = open_zero_or_more_files(sub_matches, "cache")?;
-            let format = get_required_arg::<DumpFormat>(sub_matches, "format")?;
+            let format = get_required_arg::<DumpFormat>(sub_matches, "format")
+                .context("failed to dump previously parsed flags")?;
             let output = commands::dump_parsed_flags(input, *format)?;
             let path = get_required_arg::<String>(sub_matches, "out")?;
             write_output_to_file_or_stdout(path, &output)?;
diff --git a/tools/aconfig/src/protos.rs b/tools/aconfig/src/protos.rs
index 4ddada7..2ab6e05 100644
--- a/tools/aconfig/src/protos.rs
+++ b/tools/aconfig/src/protos.rs
@@ -92,8 +92,7 @@
         ensure!(codegen::is_valid_name_ident(pdf.name()), "bad flag declaration: bad name");
         ensure!(codegen::is_valid_name_ident(pdf.namespace()), "bad flag declaration: bad name");
         ensure!(!pdf.description().is_empty(), "bad flag declaration: empty description");
-
-        // ProtoFlagDeclaration.bug: Vec<String>: may be empty, no checks needed
+        ensure!(pdf.bug.len() == 1, "bad flag declaration: exactly one bug required");
 
         Ok(())
     }
@@ -195,8 +194,7 @@
         for tp in pf.trace.iter() {
             super::tracepoint::verify_fields(tp)?;
         }
-
-        // ProtoParsedFlag.bug: Vec<String>: may be empty, no checks needed
+        ensure!(pf.bug.len() == 1, "bad flag declaration: exactly one bug required");
 
         Ok(())
     }
@@ -279,12 +277,12 @@
     namespace: "first_ns"
     description: "This is the description of the first flag."
     bug: "123"
-    bug: "abc"
 }
 flag {
     name: "second"
     namespace: "second_ns"
     description: "This is the description of the second flag."
+    bug: "abc"
 }
 "#,
         )
@@ -294,14 +292,12 @@
         assert_eq!(first.name(), "first");
         assert_eq!(first.namespace(), "first_ns");
         assert_eq!(first.description(), "This is the description of the first flag.");
-        assert_eq!(first.bug.len(), 2);
-        assert_eq!(first.bug[0], "123");
-        assert_eq!(first.bug[1], "abc");
+        assert_eq!(first.bug, vec!["123"]);
         let second = flag_declarations.flag.iter().find(|pf| pf.name() == "second").unwrap();
         assert_eq!(second.name(), "second");
         assert_eq!(second.namespace(), "second_ns");
         assert_eq!(second.description(), "This is the description of the second flag.");
-        assert_eq!(second.bug.len(), 0);
+        assert_eq!(second.bug, vec!["abc"]);
 
         // bad input: missing package in flag declarations
         let error = flag_declarations::try_from_text_proto(
@@ -376,6 +372,36 @@
         )
         .unwrap_err();
         assert!(format!("{:?}", error).contains("bad flag declaration: bad name"));
+
+        // bad input: no bug entries in flag declaration
+        let error = flag_declarations::try_from_text_proto(
+            r#"
+package: "com.foo.bar"
+flag {
+    name: "first"
+    namespace: "first_ns"
+    description: "This is the description of the first flag."
+}
+"#,
+        )
+        .unwrap_err();
+        assert!(format!("{:?}", error).contains("bad flag declaration: exactly one bug required"));
+
+        // bad input: multiple bug entries in flag declaration
+        let error = flag_declarations::try_from_text_proto(
+            r#"
+package: "com.foo.bar"
+flag {
+    name: "first"
+    namespace: "first_ns"
+    description: "This is the description of the first flag."
+    bug: "123"
+    bug: "abc"
+}
+"#,
+        )
+        .unwrap_err();
+        assert!(format!("{:?}", error).contains("bad flag declaration: exactly one bug required"));
     }
 
     #[test]
@@ -482,6 +508,7 @@
     name: "first"
     namespace: "first_ns"
     description: "This is the description of the first flag."
+    bug: "SOME_BUG"
     state: DISABLED
     permission: READ_ONLY
     trace {
@@ -495,6 +522,7 @@
     name: "second"
     namespace: "second_ns"
     description: "This is the description of the second flag."
+    bug: "SOME_BUG"
     state: ENABLED
     permission: READ_WRITE
     trace {
@@ -516,6 +544,7 @@
         assert_eq!(second.name(), "second");
         assert_eq!(second.namespace(), "second_ns");
         assert_eq!(second.description(), "This is the description of the second flag.");
+        assert_eq!(second.bug, vec!["SOME_BUG"]);
         assert_eq!(second.state(), ProtoFlagState::ENABLED);
         assert_eq!(second.permission(), ProtoFlagPermission::READ_WRITE);
         assert_eq!(2, second.trace.len());
@@ -569,6 +598,7 @@
     name: "first"
     namespace: "first_ns"
     description: "This is the description of the first flag."
+    bug: ""
     state: DISABLED
     permission: READ_ONLY
     trace {
@@ -582,6 +612,7 @@
     name: "second"
     namespace: "second_ns"
     description: "This is the description of the second flag."
+    bug: ""
     state: ENABLED
     permission: READ_WRITE
     trace {
@@ -604,6 +635,7 @@
     name: "bbb"
     namespace: "first_ns"
     description: "This is the description of the first flag."
+    bug: ""
     state: DISABLED
     permission: READ_ONLY
     trace {
@@ -617,6 +649,7 @@
     name: "aaa"
     namespace: "second_ns"
     description: "This is the description of the second flag."
+    bug: ""
     state: ENABLED
     permission: READ_WRITE
     trace {
@@ -639,6 +672,7 @@
     name: "bar"
     namespace: "first_ns"
     description: "This is the description of the first flag."
+    bug: ""
     state: DISABLED
     permission: READ_ONLY
     trace {
@@ -652,6 +686,7 @@
     name: "bar"
     namespace: "second_ns"
     description: "This is the description of the second flag."
+    bug: ""
     state: ENABLED
     permission: READ_WRITE
     trace {
@@ -673,6 +708,7 @@
     name: "bar"
     namespace: "first_ns"
     description: "This is the description of the first flag."
+    bug: "b/12345678"
     state: DISABLED
     permission: READ_ONLY
     trace {
@@ -703,6 +739,7 @@
     name: "first"
     namespace: "first_ns"
     description: "This is the description of the first flag."
+    bug: "a"
     state: DISABLED
     permission: READ_ONLY
     trace {
@@ -716,6 +753,7 @@
     name: "second"
     namespace: "second_ns"
     description: "This is the description of the second flag."
+    bug: "b"
     state: ENABLED
     permission: READ_WRITE
     trace {
@@ -733,6 +771,7 @@
     name: "first"
     namespace: "first_ns"
     description: "This is the description of the first flag."
+    bug: "a"
     state: DISABLED
     permission: READ_ONLY
     trace {
@@ -749,6 +788,7 @@
     package: "com.second"
     name: "second"
     namespace: "second_ns"
+    bug: "b"
     description: "This is the description of the second flag."
     state: ENABLED
     permission: READ_WRITE
diff --git a/tools/aconfig/src/test.rs b/tools/aconfig/src/test.rs
index 04bbe28..14beb93 100644
--- a/tools/aconfig/src/test.rs
+++ b/tools/aconfig/src/test.rs
@@ -61,7 +61,6 @@
   name: "enabled_ro"
   namespace: "aconfig_test"
   description: "This flag is ENABLED + READ_ONLY"
-  bug: "789"
   bug: "abc"
   state: ENABLED
   permission: READ_ONLY
@@ -86,6 +85,7 @@
   name: "enabled_rw"
   namespace: "aconfig_test"
   description: "This flag is ENABLED + READ_WRITE"
+  bug: ""
   state: ENABLED
   permission: READ_WRITE
   trace {
diff --git a/tools/aconfig/tests/test.aconfig b/tools/aconfig/tests/test.aconfig
index d7ac919..46cf1e9 100644
--- a/tools/aconfig/tests/test.aconfig
+++ b/tools/aconfig/tests/test.aconfig
@@ -8,7 +8,6 @@
     name: "enabled_ro"
     namespace: "aconfig_test"
     description: "This flag is ENABLED + READ_ONLY"
-    bug: "789"
     bug: "abc"
 }
 
@@ -19,7 +18,8 @@
     name: "enabled_rw"
     namespace: "aconfig_test"
     description: "This flag is ENABLED + READ_WRITE"
-    # no bug field: bug is not mandatory
+    # for bug fields, the empty string is a discouraged but valid value
+    bug: ""
 }
 
 # This flag's final value is calculated from:
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 1f021e0..732b5e9 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -1429,7 +1429,7 @@
       if os.path.exists(new_path):
         return new_path
     raise ExternalError(
-        "Failed to find {}".format(new_path))
+        "Failed to find {}".format(path))
 
   if not split_args:
     return split_args