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778    </style>
779  </head>
780  <body for="html-export" id="body">
781    <div class="mume mp">
782      <h1 class="mume-header fontColor">binder事件上下文如何关联</h1>
783
784      <p class="fontColor">
785        binder事件相对复杂，这里是从ftrace事件中抽离出来的binder相关消息，用来作为开发者或用户追踪binder事件的参考
786        <br />
787        a binder event is identified by the sender and receive device, and a reply message only end
788        <br />
789        the last binder msg which reply the calling one.
790        <br />
791        the alloc_buf msg can always flow the binder_transaction, so we no need to identify the alloc msg with
792        transactionID
793      </p>
794      <h2 class="mume-header fontColor">TAG TT need reply!!! needReply = !isReply &amp;&amp; !(flags &amp; 0x01);</h2>
795
796      <pre
797        class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128108: binder_transaction: transaction=25155526 dest_node=25155471 dest_proc=506 dest_thread=0 reply=0 flags=0x10 code=0x9
798RenderThread-2267  ( 1592) [003] ...1 168766.128110: binder_transaction_alloc_buf: transaction=25155526 data_size=120 offsets_size=8
799</code></pre>
800      <h3 class="mume-header fontColor">received</h3>
801
802      <pre
803        class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128154: binder_transaction_received: transaction=25155526
804</code></pre>
805      <h3 class="mume-header fontColor">binder is in DB, TAG A needReply</h3>
806
807      <pre
808        class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128221: binder_transaction: transaction=25155529 dest_node=25155527 dest_proc=1592 dest_thread=2267 reply=0 flags=0x10 code=0x5f474854
809Binder:506_2-537   (  506) [003] ...1 168766.128223: binder_transaction_alloc_buf: transaction=25155529 data_size=72 offsets_size=0
810</code></pre>
811      <h2 class="mume-header" id></h2>
812
813      <pre
814        class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128243: binder_transaction_received: transaction=25155529
815</code></pre>
816      <h3 class="mume-header fontColor">the flowing is for TAG A, this is the reply for TAG A</h3>
817
818      <pre
819        class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128262: binder_transaction: transaction=25155530 dest_node=0 dest_proc=506 dest_thread=537 reply=1 flags=0x8 code=0x0
820
821RenderThread-2267  ( 1592) [003] ...1 168766.128264: binder_transaction_alloc_buf: transaction=25155530 data_size=4 offsets_size=0
822</code></pre>
823      <h3 class="mume-header fontColor">calc the dur of TAG A</h3>
824
825      <pre
826        class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128288: binder_transaction_received: transaction=25155530
827</code></pre>
828      <h3 class="mume-header fontColor">binder last TAG A needReply, this is TAG B needReply!!!</h3>
829
830      <pre
831        class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128328: binder_transaction: transaction=25155532 dest_node=25155527 dest_proc=1592 dest_thread=2267 reply=0 flags=0x10 code=0x2
832Binder:506_2-537   (  506) [003] ...1 168766.128330: binder_transaction_alloc_buf: transaction=25155532 data_size=72 offsets_size=0
833</code></pre>
834      <h2 class="mume-header fontColor">in db</h2>
835
836      <pre
837        class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128347: binder_transaction_received: transaction=25155532
838</code></pre>
839      <h2 class="mume-header fontColor">the reply message is not in db Session D, this is the reply for TAG B</h2>
840
841      <pre
842        class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128361: binder_transaction: transaction=25155533 dest_node=0 dest_proc=506 dest_thread=537 reply=1 flags=0x0 code=0x0
843RenderThread-2267  ( 1592) [003] ...1 168766.128363: binder_transaction_alloc_buf: transaction=25155533 data_size=4 offsets_size=0
844</code></pre>
845      <h3 class="mume-header fontColor">no this message in db, calcate the dur of TAG B</h3>
846
847      <pre
848        class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128385: binder_transaction_received: transaction=25155533
849</code></pre>
850      <h3 class="mume-header fontColor">no this message in db Session E, this is the reply for TAG TT</h3>
851
852      <pre
853        class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128412: binder_transaction: transaction=25155534 dest_node=0 dest_proc=1592 dest_thread=2267 reply=1 flags=0x0 code=0x0
854
855Binder:506_2-537   (  506) [003] ...1 168766.128413: binder_transaction_alloc_buf: transaction=25155534 data_size=68 offsets_size=0
856</code></pre>
857      <h2 class="mume-header fontColor">the dur of TAG TT is calcated by the flowing msg</h2>
858
859      <pre
860        class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128430: binder_transaction_received: transaction=25155534
861</code></pre>
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