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From a41a079a81f381f2002917fb1c030690e0798f0c Mon Sep 17 00:00:00 2001
From: Jeff Vander Stoep <jeffv@google.com>
Date: Thu, 2 Feb 2023 13:33:47 +0100
Subject: [PATCH] Support selecting target log buffer
Android has several different log buffers. Previously, this library
would only support logging to the "Main" log. Now, it logs to the
default log (which is Main for most processes), with the option to
override which log buffer you send messages to in the config.
Test: atest
Change-Id: I3cc393b989b8189675581ba6bf700f95715aa9e9
---
src/lib.rs | 73 +++++++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 59 insertions(+), 14 deletions(-)
diff --git a/src/lib.rs b/src/lib.rs
index 0446fad..9ec7f0d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -85,21 +85,49 @@ pub use env_logger::fmt::Formatter;
pub(crate) type FormatFn = Box<dyn Fn(&mut dyn fmt::Write, &Record) -> fmt::Result + Sync + Send>;
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+pub enum LogId {
+ Main,
+ Radio,
+ Events,
+ System,
+ Crash
+}
+
+impl LogId {
+ #[cfg(target_os = "android")]
+ fn to_native(log_id: Option<Self>) -> log_ffi::log_id_t {
+ match log_id {
+ Some(LogId::Main) => log_ffi::log_id_t::MAIN,
+ Some(LogId::Radio) => log_ffi::log_id_t::RADIO,
+ Some(LogId::Events) => log_ffi::log_id_t::EVENTS,
+ Some(LogId::System) => log_ffi::log_id_t::SYSTEM,
+ Some(LogId::Crash) => log_ffi::log_id_t::CRASH,
+ None => log_ffi::log_id_t::DEFAULT,
+ }
+ }
+}
+
/// Output log to android system.
#[cfg(target_os = "android")]
-fn android_log(prio: log_ffi::LogPriority, tag: &CStr, msg: &CStr) {
+fn android_log(log_id: log_ffi::log_id_t, prio: log_ffi::LogPriority, tag: &CStr, msg: &CStr) {
+ let mut message = log_ffi::__android_log_message {
+ struct_size: std::mem::size_of::<log_ffi::__android_log_message>(),
+ buffer_id: log_id as i32,
+ priority: prio as i32,
+ tag: tag.as_ptr() as *const log_ffi::c_char,
+ file: ptr::null(),
+ line: 0,
+ message: msg.as_ptr() as *const log_ffi::c_char,
+ };
unsafe {
- log_ffi::__android_log_write(
- prio as log_ffi::c_int,
- tag.as_ptr() as *const log_ffi::c_char,
- msg.as_ptr() as *const log_ffi::c_char,
- )
+ log_ffi::__android_log_write_log_message(&mut message as *mut _);
};
}
/// Dummy output placeholder for tests.
#[cfg(not(target_os = "android"))]
-fn android_log(_priority: Level, _tag: &CStr, _msg: &CStr) {}
+fn android_log(_log_id: Option<LogId>, _priority: Level, _tag: &CStr, _msg: &CStr) {}
/// Underlying android logger backend
pub struct AndroidLogger {
@@ -172,7 +200,7 @@ impl Log for AndroidLogger {
// message must not exceed LOGGING_MSG_MAX_LEN
// therefore split log message into multiple log calls
- let mut writer = PlatformLogWriter::new(record.level(), tag);
+ let mut writer = PlatformLogWriter::new(config.log_id, record.level(), tag);
// If a custom tag is used, add the module path to the message.
// Use PlatformLogWriter to output chunks if they exceed max size.
@@ -215,6 +243,7 @@ impl AndroidLogger {
#[derive(Default)]
pub struct Config {
log_level: Option<LevelFilter>,
+ log_id: Option<LogId>,
filter: Option<env_logger::filter::Filter>,
tag: Option<CString>,
custom_format: Option<FormatFn>,
@@ -241,6 +270,15 @@ impl Config {
self
}
+ /// Change which log buffer is used
+ ///
+ /// By default, logs are sent to the `Main` log. Other logging buffers may only be accessible
+ /// to certain processes.
+ pub fn with_log_id(mut self, log_id: LogId) -> Self {
+ self.log_id = Some(log_id);
+ self
+ }
+
fn filter_matches(&self, record: &Record) -> bool {
if let Some(ref filter) = self.filter {
filter.matches(record)
@@ -282,6 +320,8 @@ pub struct PlatformLogWriter<'a> {
priority: LogPriority,
#[cfg(not(target_os = "android"))]
priority: Level,
+ #[cfg(target_os = "android")] log_id: log_ffi::log_id_t,
+ #[cfg(not(target_os = "android"))] log_id: Option<LogId>,
len: usize,
last_newline_index: usize,
tag: &'a CStr,
@@ -290,10 +330,11 @@ pub struct PlatformLogWriter<'a> {
impl<'a> PlatformLogWriter<'a> {
#[cfg(target_os = "android")]
- pub fn new_with_priority(priority: log_ffi::LogPriority, tag: &CStr) -> PlatformLogWriter {
+ pub fn new_with_priority(log_id: Option<LogId>, priority: log_ffi::LogPriority, tag: &CStr) -> PlatformLogWriter {
#[allow(deprecated)] // created an issue #35 for this
PlatformLogWriter {
priority,
+ log_id: LogId::to_native(log_id),
len: 0,
last_newline_index: 0,
tag,
@@ -302,8 +343,9 @@ impl<'a> PlatformLogWriter<'a> {
}
#[cfg(target_os = "android")]
- pub fn new(level: Level, tag: &CStr) -> PlatformLogWriter {
+ pub fn new(log_id: Option<LogId>, level: Level, tag: &CStr) -> PlatformLogWriter {
Self::new_with_priority(
+ log_id,
match level {
Level::Warn => LogPriority::WARN,
Level::Info => LogPriority::INFO,
@@ -316,10 +358,11 @@ impl<'a> PlatformLogWriter<'a> {
}
#[cfg(not(target_os = "android"))]
- pub fn new(level: Level, tag: &CStr) -> PlatformLogWriter {
+ pub fn new(log_id: Option<LogId>, level: Level, tag: &CStr) -> PlatformLogWriter {
#[allow(deprecated)] // created an issue #35 for this
PlatformLogWriter {
priority: level,
+ log_id,
len: 0,
last_newline_index: 0,
tag,
@@ -376,7 +419,7 @@ impl<'a> PlatformLogWriter<'a> {
});
let msg: &CStr = unsafe { CStr::from_ptr(self.buffer.as_ptr().cast()) };
- android_log(self.priority, self.tag, msg);
+ android_log(self.log_id, self.priority, self.tag, msg);
unsafe { *self.buffer.get_unchecked_mut(len) = last_byte };
}
@@ -481,9 +524,11 @@ mod tests {
// Filter is checked in config_filter_match below.
let config = Config::default()
.with_max_level(LevelFilter::Trace)
+ .with_log_id(LogId::System)
.with_tag("my_app");
assert_eq!(config.log_level, Some(LevelFilter::Trace));
+ assert_eq!(config.log_id, Some(LogId::System));
assert_eq!(config.tag, Some(CString::new("my_app").unwrap()));
}
@@ -556,7 +601,7 @@ mod tests {
fn platform_log_writer_init_values() {
let tag = CStr::from_bytes_with_nul(b"tag\0").unwrap();
- let writer = PlatformLogWriter::new(Level::Warn, tag);
+ let writer = PlatformLogWriter::new(None, Level::Warn, tag);
assert_eq!(writer.tag, tag);
// Android uses LogPriority instead, which doesn't implement equality checks
@@ -661,7 +706,7 @@ mod tests {
}
fn get_tag_writer() -> PlatformLogWriter<'static> {
- PlatformLogWriter::new(Level::Warn, CStr::from_bytes_with_nul(b"tag\0").unwrap())
+ PlatformLogWriter::new(None, Level::Warn, CStr::from_bytes_with_nul(b"tag\0").unwrap())
}
unsafe fn assume_init_slice<T>(slice: &[MaybeUninit<T>]) -> &[T] {
--
2.39.1.456.gfc5497dd1b-goog
|
