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linux/drivers/android/binder_trace.h
Todd Kjos 372e3147df binder: refactor binder ref inc/dec for thread safety 
Once locks are added, binder_ref's will only be accessed
safely with the proc lock held. Refactor the inc/dec paths
to make them atomic with the binder_get_ref* paths and
node inc/dec. For example, instead of:

  ref = binder_get_ref(proc, handle, strong);
  ...
  binder_dec_ref(ref, strong);

we now have:

  ret = binder_dec_ref_for_handle(proc, handle, strong, &rdata);

Since the actual ref is no longer exposed to callers, a
new struct binder_ref_data is introduced which can be used
to return a copy of ref state.

Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-07-17 14:48:23 +02:00

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/*
* Copyright (C) 2012 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM binder
#if !defined(_BINDER_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
#define _BINDER_TRACE_H
#include <linux/tracepoint.h>
struct binder_buffer;
struct binder_node;
struct binder_proc;
struct binder_alloc;
struct binder_ref_data;
struct binder_thread;
struct binder_transaction;
TRACE_EVENT(binder_ioctl,
TP_PROTO(unsigned int cmd, unsigned long arg),
TP_ARGS(cmd, arg),
TP_STRUCT__entry(
__field(unsigned int, cmd)
__field(unsigned long, arg)
),
TP_fast_assign(
__entry->cmd = cmd;
__entry->arg = arg;
),
TP_printk("cmd=0x%x arg=0x%lx", __entry->cmd, __entry->arg)
);
DECLARE_EVENT_CLASS(binder_lock_class,
TP_PROTO(const char *tag),
TP_ARGS(tag),
TP_STRUCT__entry(
__field(const char *, tag)
),
TP_fast_assign(
__entry->tag = tag;
),
TP_printk("tag=%s", __entry->tag)
);
#define DEFINE_BINDER_LOCK_EVENT(name) \
DEFINE_EVENT(binder_lock_class, name, \
TP_PROTO(const char *func), \
TP_ARGS(func))
DEFINE_BINDER_LOCK_EVENT(binder_lock);
DEFINE_BINDER_LOCK_EVENT(binder_locked);
DEFINE_BINDER_LOCK_EVENT(binder_unlock);
DECLARE_EVENT_CLASS(binder_function_return_class,
TP_PROTO(int ret),
TP_ARGS(ret),
TP_STRUCT__entry(
__field(int, ret)
),
TP_fast_assign(
__entry->ret = ret;
),
TP_printk("ret=%d", __entry->ret)
);
#define DEFINE_BINDER_FUNCTION_RETURN_EVENT(name) \
DEFINE_EVENT(binder_function_return_class, name, \
TP_PROTO(int ret), \
TP_ARGS(ret))
DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_ioctl_done);
DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_write_done);
DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_read_done);
TRACE_EVENT(binder_wait_for_work,
TP_PROTO(bool proc_work, bool transaction_stack, bool thread_todo),
TP_ARGS(proc_work, transaction_stack, thread_todo),
TP_STRUCT__entry(
__field(bool, proc_work)
__field(bool, transaction_stack)
__field(bool, thread_todo)
),
TP_fast_assign(
__entry->proc_work = proc_work;
__entry->transaction_stack = transaction_stack;
__entry->thread_todo = thread_todo;
),
TP_printk("proc_work=%d transaction_stack=%d thread_todo=%d",
__entry->proc_work, __entry->transaction_stack,
__entry->thread_todo)
);
TRACE_EVENT(binder_transaction,
TP_PROTO(bool reply, struct binder_transaction *t,
struct binder_node *target_node),
TP_ARGS(reply, t, target_node),
TP_STRUCT__entry(
__field(int, debug_id)
__field(int, target_node)
__field(int, to_proc)
__field(int, to_thread)
__field(int, reply)
__field(unsigned int, code)
__field(unsigned int, flags)
),
TP_fast_assign(
__entry->debug_id = t->debug_id;
__entry->target_node = target_node ? target_node->debug_id : 0;
__entry->to_proc = t->to_proc->pid;
__entry->to_thread = t->to_thread ? t->to_thread->pid : 0;
__entry->reply = reply;
__entry->code = t->code;
__entry->flags = t->flags;
),
TP_printk("transaction=%d dest_node=%d dest_proc=%d dest_thread=%d reply=%d flags=0x%x code=0x%x",
__entry->debug_id, __entry->target_node,
__entry->to_proc, __entry->to_thread,
__entry->reply, __entry->flags, __entry->code)
);
TRACE_EVENT(binder_transaction_received,
TP_PROTO(struct binder_transaction *t),
TP_ARGS(t),
TP_STRUCT__entry(
__field(int, debug_id)
),
TP_fast_assign(
__entry->debug_id = t->debug_id;
),
TP_printk("transaction=%d", __entry->debug_id)
);
TRACE_EVENT(binder_transaction_node_to_ref,
TP_PROTO(struct binder_transaction *t, struct binder_node *node,
struct binder_ref_data *rdata),
TP_ARGS(t, node, rdata),
TP_STRUCT__entry(
__field(int, debug_id)
__field(int, node_debug_id)
__field(binder_uintptr_t, node_ptr)
__field(int, ref_debug_id)
__field(uint32_t, ref_desc)
),
TP_fast_assign(
__entry->debug_id = t->debug_id;
__entry->node_debug_id = node->debug_id;
__entry->node_ptr = node->ptr;
__entry->ref_debug_id = rdata->debug_id;
__entry->ref_desc = rdata->desc;
),
TP_printk("transaction=%d node=%d src_ptr=0x%016llx ==> dest_ref=%d dest_desc=%d",
__entry->debug_id, __entry->node_debug_id,
(u64)__entry->node_ptr,
__entry->ref_debug_id, __entry->ref_desc)
);
TRACE_EVENT(binder_transaction_ref_to_node,
TP_PROTO(struct binder_transaction *t, struct binder_node *node,
struct binder_ref_data *rdata),
TP_ARGS(t, node, rdata),
TP_STRUCT__entry(
__field(int, debug_id)
__field(int, ref_debug_id)
__field(uint32_t, ref_desc)
__field(int, node_debug_id)
__field(binder_uintptr_t, node_ptr)
),
TP_fast_assign(
__entry->debug_id = t->debug_id;
__entry->ref_debug_id = rdata->debug_id;
__entry->ref_desc = rdata->desc;
__entry->node_debug_id = node->debug_id;
__entry->node_ptr = node->ptr;
),
TP_printk("transaction=%d node=%d src_ref=%d src_desc=%d ==> dest_ptr=0x%016llx",
__entry->debug_id, __entry->node_debug_id,
__entry->ref_debug_id, __entry->ref_desc,
(u64)__entry->node_ptr)
);
TRACE_EVENT(binder_transaction_ref_to_ref,
TP_PROTO(struct binder_transaction *t, struct binder_node *node,
struct binder_ref_data *src_ref,
struct binder_ref_data *dest_ref),
TP_ARGS(t, node, src_ref, dest_ref),
TP_STRUCT__entry(
__field(int, debug_id)
__field(int, node_debug_id)
__field(int, src_ref_debug_id)
__field(uint32_t, src_ref_desc)
__field(int, dest_ref_debug_id)
__field(uint32_t, dest_ref_desc)
),
TP_fast_assign(
__entry->debug_id = t->debug_id;
__entry->node_debug_id = node->debug_id;
__entry->src_ref_debug_id = src_ref->debug_id;
__entry->src_ref_desc = src_ref->desc;
__entry->dest_ref_debug_id = dest_ref->debug_id;
__entry->dest_ref_desc = dest_ref->desc;
),
TP_printk("transaction=%d node=%d src_ref=%d src_desc=%d ==> dest_ref=%d dest_desc=%d",
__entry->debug_id, __entry->node_debug_id,
__entry->src_ref_debug_id, __entry->src_ref_desc,
__entry->dest_ref_debug_id, __entry->dest_ref_desc)
);
TRACE_EVENT(binder_transaction_fd,
TP_PROTO(struct binder_transaction *t, int src_fd, int dest_fd),
TP_ARGS(t, src_fd, dest_fd),
TP_STRUCT__entry(
__field(int, debug_id)
__field(int, src_fd)
__field(int, dest_fd)
),
TP_fast_assign(
__entry->debug_id = t->debug_id;
__entry->src_fd = src_fd;
__entry->dest_fd = dest_fd;
),
TP_printk("transaction=%d src_fd=%d ==> dest_fd=%d",
__entry->debug_id, __entry->src_fd, __entry->dest_fd)
);
DECLARE_EVENT_CLASS(binder_buffer_class,
TP_PROTO(struct binder_buffer *buf),
TP_ARGS(buf),
TP_STRUCT__entry(
__field(int, debug_id)
__field(size_t, data_size)
__field(size_t, offsets_size)
),
TP_fast_assign(
__entry->debug_id = buf->debug_id;
__entry->data_size = buf->data_size;
__entry->offsets_size = buf->offsets_size;
),
TP_printk("transaction=%d data_size=%zd offsets_size=%zd",
__entry->debug_id, __entry->data_size, __entry->offsets_size)
);
DEFINE_EVENT(binder_buffer_class, binder_transaction_alloc_buf,
TP_PROTO(struct binder_buffer *buffer),
TP_ARGS(buffer));
DEFINE_EVENT(binder_buffer_class, binder_transaction_buffer_release,
TP_PROTO(struct binder_buffer *buffer),
TP_ARGS(buffer));
DEFINE_EVENT(binder_buffer_class, binder_transaction_failed_buffer_release,
TP_PROTO(struct binder_buffer *buffer),
TP_ARGS(buffer));
TRACE_EVENT(binder_update_page_range,
TP_PROTO(struct binder_alloc *alloc, bool allocate,
void *start, void *end),
TP_ARGS(alloc, allocate, start, end),
TP_STRUCT__entry(
__field(int, proc)
__field(bool, allocate)
__field(size_t, offset)
__field(size_t, size)
),
TP_fast_assign(
__entry->proc = alloc->pid;
__entry->allocate = allocate;
__entry->offset = start - alloc->buffer;
__entry->size = end - start;
),
TP_printk("proc=%d allocate=%d offset=%zu size=%zu",
__entry->proc, __entry->allocate,
__entry->offset, __entry->size)
);
TRACE_EVENT(binder_command,
TP_PROTO(uint32_t cmd),
TP_ARGS(cmd),
TP_STRUCT__entry(
__field(uint32_t, cmd)
),
TP_fast_assign(
__entry->cmd = cmd;
),
TP_printk("cmd=0x%x %s",
__entry->cmd,
_IOC_NR(__entry->cmd) < ARRAY_SIZE(binder_command_strings) ?
binder_command_strings[_IOC_NR(__entry->cmd)] :
"unknown")
);
TRACE_EVENT(binder_return,
TP_PROTO(uint32_t cmd),
TP_ARGS(cmd),
TP_STRUCT__entry(
__field(uint32_t, cmd)
),
TP_fast_assign(
__entry->cmd = cmd;
),
TP_printk("cmd=0x%x %s",
__entry->cmd,
_IOC_NR(__entry->cmd) < ARRAY_SIZE(binder_return_strings) ?
binder_return_strings[_IOC_NR(__entry->cmd)] :
"unknown")
);
#endif /* _BINDER_TRACE_H */
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE binder_trace
#include <trace/define_trace.h>
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