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rust_binder: add transaction buffer tracepoints

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Add `binder_transaction_alloc_buf`, `binder_transaction_buffer_release`,
and `binder_transaction_failed_buffer_release`, mirroring C Binder's
`binder_buffer_class` events of the same names and following
android's fork for the function signatures.

Link: https://github.com/Rust-for-Linux/linux/issues/1226
Suggested-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Sagar Taunk <sagartaunk@proton.me>
Link: https://patch.msgid.link/20260927125622.676342-2-sagartaunk@proton.me
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sagar Taunk 2026-09-27 12:56:36 +00:00 committed by Greg Kroah-Hartman
parent 2fcc8b9687
commit 710da9d05b
2 changed files with 79 additions and 0 deletions
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42
drivers/android/binder/rust_binder_events.h
View File

@ -177,6 +177,48 @@ TRACE_EVENT(binder_return,
"unknown")
);
TRACE_EVENT(binder_transaction_alloc_buf,
TP_PROTO(int debug_id, size_t data_size, size_t offsets_size, size_t extra_buffers_size),
TP_ARGS(debug_id, data_size, offsets_size, extra_buffers_size),
TP_STRUCT__entry(
__field(int, debug_id)
__field(size_t, data_size)
__field(size_t, offsets_size)
__field(size_t, extra_buffers_size)
),
TP_fast_assign(
__entry->debug_id = debug_id;
__entry->data_size = data_size;
__entry->offsets_size = offsets_size;
__entry->extra_buffers_size = extra_buffers_size;
),
TP_printk("transaction=%d data_size=%zd offsets_size=%zd extra_buffers_size=%zd",
__entry->debug_id, __entry->data_size, __entry->offsets_size,
__entry->extra_buffers_size)
);
DECLARE_EVENT_CLASS(binder_buffer_release_class,
TP_PROTO(int debug_id),
TP_ARGS(debug_id),
TP_STRUCT__entry(
__field(int, debug_id)
),
TP_fast_assign(
__entry->debug_id = debug_id;
),
TP_printk("transaction=%d", __entry->debug_id)
);
#define DEFINE_RBINDER_FUNCTION_BUFFER_EVENT(name) \
DEFINE_EVENT(binder_buffer_release_class, name, \
TP_PROTO(int debug_id), \
TP_ARGS(debug_id))
DEFINE_RBINDER_FUNCTION_BUFFER_EVENT(binder_transaction_buffer_release);
DEFINE_RBINDER_FUNCTION_BUFFER_EVENT(binder_transaction_failed_buffer_release);
DEFINE_RBINDER_FUNCTION_BUFFER_EVENT(binder_transaction_update_buffer_release);
#endif /* _RUST_BINDER_TRACE_H */
/* This part must be outside protection */

37
drivers/android/binder/trace.rs
View File

@ -24,6 +24,11 @@
unsafe fn binder_transaction_fd_recv(t_debug_id: c_int, fd: c_int, offset: usize);
unsafe fn binder_command(cmd: u32);
unsafe fn binder_return(ret: u32);
unsafe fn binder_transaction_alloc_buf(
debug_id: c_int,data_size: usize, offset_size: usize, extra_buffers_size: usize);
unsafe fn binder_transaction_buffer_release(debug_id: c_int);
unsafe fn binder_transaction_failed_buffer_release(debug_id: c_int);
unsafe fn binder_transaction_update_buffer_release(debug_id: c_int);
}
#[inline]
@ -105,3 +110,35 @@ pub(crate) fn trace_return(ret: u32) {
// SAFETY: This function is always safe to call.
unsafe { binder_return(ret) }
}
#[inline]
pub(crate) fn trace_transaction_alloc_buf(
debug_id: usize,
data_size: usize,
offset_size: usize,
extra_buffers_size: usize,
) {
// SAFETY: The `data` pointer is valid.
unsafe {
binder_transaction_alloc_buf(
debug_id as c_int,
data_size,
offset_size,
extra_buffers_size,
)
}
}
#[inline]
pub(crate) fn trace_transaction_buffer_release(debug_id: usize) {
// SAFETY: This function is always safe to call.
unsafe { binder_transaction_buffer_release(debug_id as c_int) }
}
#[inline]
pub(crate) fn trace_transaction_failed_buffer_release(debug_id: usize) {
// SAFETY: This function is always safe to call.
unsafe { binder_transaction_failed_buffer_release(debug_id as c_int) }
}
#[inline]
pub(crate) fn trace_transaction_update_buffer_release(debug_id: usize) {
// SAFETY: This function is always safe to call.
unsafe { binder_transaction_update_buffer_release(debug_id as c_int) }
}