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ANDROID: vendor_hooks: Add hook for binder_detect_low_async_space_locked

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Add hook for binder_detect_low_async_space_locked, which gives the vendor a choice whether or not this alloc new buf should go on or not

Bug: 322915513
Change-Id: Ie7f1567dae6dee0fb22b014cd1eacc3308ccb205
Signed-off-by: chenweitao <chenweitao@oppo.com>
This commit is contained in:
chenweitao 2024-01-31 16:49:23 +08:00 committed by Todd Kjos
parent 7b6a6228df
commit 7ce117301e
3 changed files with 13 additions and 0 deletions
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8
drivers/android/binder_alloc.c
View File

@ -383,6 +383,7 @@ static struct binder_buffer *binder_alloc_new_buf_locked(
void __user *end_page_addr;
size_t size, data_offsets_size;
int ret;
bool should_fail = false;
/* Check binder_alloc is fully initialized */
if (!binder_alloc_get_vma(alloc)) {
@ -409,6 +410,13 @@ static struct binder_buffer *binder_alloc_new_buf_locked(
return ERR_PTR(-EINVAL);
}
trace_android_vh_binder_alloc_new_buf_locked(size, &alloc->free_async_space, is_async);
trace_android_vh_binder_detect_low_async_space_locked(is_async, &alloc->free_async_space, pid, &should_fail);
if (should_fail) {
binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
"%d: binder_alloc_buf size %zd failed, not allowed to alloc more async space\n",
alloc->pid, size);
return ERR_PTR(-EPERM);
}
if (is_async &&
alloc->free_async_space < size + sizeof(struct binder_buffer)) {
binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,

1
drivers/android/vendor_hooks.c
View File

@ -375,3 +375,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_ioctl_end);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_looper_exited);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_spawn_new_thread);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_has_special_work_ilocked);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_detect_low_async_space_locked);

4
include/trace/hooks/binder.h
View File

@ -82,6 +82,10 @@ DECLARE_HOOK(android_vh_binder_select_special_worklist,
DECLARE_HOOK(android_vh_binder_alloc_new_buf_locked,
TP_PROTO(size_t size, size_t *free_async_space, int is_async),
TP_ARGS(size, free_async_space, is_async));
DECLARE_HOOK(android_vh_binder_detect_low_async_space_locked,
TP_PROTO(int is_async, size_t *free_async_space, int pid, bool *should_fail),
TP_ARGS(is_async, free_async_space, pid, should_fail));
struct binder_transaction_data;
DECLARE_HOOK(android_vh_binder_reply,
TP_PROTO(struct binder_proc *target_proc, struct binder_proc *proc,