Print backtrace of microdroid_manager to kmsg
To track any possible bugs on microdroid_manager.
Bug: 258760809
Test: intentionally crash microdroid_manager and see console
Change-Id: I2359e59270a1c6c5efab2a6cb1e0727bb3c5743e
diff --git a/microdroid_manager/microdroid_manager.rc b/microdroid_manager/microdroid_manager.rc
index cfa70bd..c41ee38 100644
--- a/microdroid_manager/microdroid_manager.rc
+++ b/microdroid_manager/microdroid_manager.rc
@@ -1,6 +1,9 @@
service microdroid_manager /system/bin/microdroid_manager
disabled
+ # print android log to kmsg
file /dev/kmsg w
+ # redirect stdout/stderr to kmsg_debug
+ stdio_to_kmsg
setenv RUST_LOG info
# TODO(jooyung) remove this when microdroid_manager becomes a daemon
oneshot
diff --git a/microdroid_manager/src/main.rs b/microdroid_manager/src/main.rs
index 4b4f996..51cecbd 100644
--- a/microdroid_manager/src/main.rs
+++ b/microdroid_manager/src/main.rs
@@ -47,6 +47,7 @@
use rustutils::system_properties::PropertyWatcher;
use std::borrow::Cow::{Borrowed, Owned};
use std::convert::TryInto;
+use std::env;
use std::fs::{self, create_dir, File, OpenOptions};
use std::io::Write;
use std::os::unix::io::{FromRawFd, IntoRawFd};
@@ -152,6 +153,11 @@
}
fn main() -> Result<()> {
+ // If debuggable, print full backtrace to console log with stdio_to_kmsg
+ if system_properties::read_bool(APP_DEBUGGABLE_PROP, true)? {
+ env::set_var("RUST_BACKTRACE", "full");
+ }
+
scopeguard::defer! {
info!("Shutting down...");
if let Err(e) = system_properties::write("sys.powerctl", "shutdown") {