Add support for selecting log buffers

While `__android_log_write_log_message` can select a target log buffer,
it did not exist before API version 30. To allow selecting a log buffer
for earlier APIs, we add a signature for `__android_log_buf_write`.

Test: Check keystore2 logs still end up in system
Bug: 221185310
Change-Id: I741a17df5026e16e3cb3263876c4f588eb3ff60e

1 files changed, 5 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index eba5b19..b648ed5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -66,6 +66,11 @@ extern "C" {
                                tag: *const c_char,
                                text: *const c_char)
                                -> c_int;
+    pub fn __android_log_buf_write(bufID: c_int,
+                                   prio: c_int,
+                                   tag: *const c_char,
+                                   text: *const c_char)
+                                   -> c_int;
     pub fn __android_log_print(prio: c_int,
                                tag: *const c_char,
                                fmt: *const c_char,