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1<!DOCTYPE html>
2<html>
3<head>
4    <title>des_binder</title>
5    <meta charset="utf-8">
6    <meta name="viewport" content="width=device-width, initial-scale=1.0">
7    <style>
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519
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717
718        body[for="html-export"]:not([dpm])[jsst] .mp {
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743        body[for="html-export"]:not([dpm]):not([jsst]) .md-sidebar-toc {
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746    </style>
747</head>
748<body for="html-export" id="body">
749<div class="mume mp  ">
750    <h1 class="mume-header fontColor">binder事件上下文如何关联</h1>
751
752    <p class="fontColor">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<br>
753        a binder event is identified by the sender and receive device, and a reply message only end<br>
754        the last binder msg which reply the calling one.<br>
755        the alloc_buf msg can always flow the binder_transaction, so we no need to identify the alloc msg with
756        transactionID</p>
757    <h2 class="mume-header fontColor">TAG TT need reply!!! needReply =
758        !isReply &amp;&amp; !(flags &amp; 0x01);</h2>
759
760    <pre 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
761RenderThread-2267  ( 1592) [003] ...1 168766.128110: binder_transaction_alloc_buf: transaction=25155526 data_size=120 offsets_size=8
762</code></pre>
763    <h3 class="mume-header fontColor">received</h3>
764
765    <pre class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128154: binder_transaction_received: transaction=25155526
766</code></pre>
767    <h3 class="mume-header fontColor">binder is in DB, TAG A needReply</h3>
768
769    <pre 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
770Binder:506_2-537   (  506) [003] ...1 168766.128223: binder_transaction_alloc_buf: transaction=25155529 data_size=72 offsets_size=0
771</code></pre>
772    <h2 class="mume-header" id></h2>
773
774    <pre class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128243: binder_transaction_received: transaction=25155529
775</code></pre>
776    <h3 class="mume-header fontColor">the flowing is for TAG A, this is
777        the reply for TAG A</h3>
778
779    <pre 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
780
781RenderThread-2267  ( 1592) [003] ...1 168766.128264: binder_transaction_alloc_buf: transaction=25155530 data_size=4 offsets_size=0
782</code></pre>
783    <h3 class="mume-header fontColor">calc the dur of TAG A</h3>
784
785    <pre class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128288: binder_transaction_received: transaction=25155530
786</code></pre>
787    <h3 class="mume-header fontColor">binder last TAG A needReply, this
788        is TAG B needReply!!!</h3>
789
790    <pre 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
791Binder:506_2-537   (  506) [003] ...1 168766.128330: binder_transaction_alloc_buf: transaction=25155532 data_size=72 offsets_size=0
792</code></pre>
793    <h2 class="mume-header fontColor">in db</h2>
794
795    <pre class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128347: binder_transaction_received: transaction=25155532
796</code></pre>
797    <h2 class="mume-header fontColor">the reply message
798        is not in db Session D, this is the reply for TAG B</h2>
799
800    <pre 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
801RenderThread-2267  ( 1592) [003] ...1 168766.128363: binder_transaction_alloc_buf: transaction=25155533 data_size=4 offsets_size=0
802</code></pre>
803    <h3 class="mume-header fontColor">no this message in db, calcate the dur
804        of TAG B</h3>
805
806    <pre class="font-text light fontColor"><code class="fontColor"> Binder:506_2-537   (  506) [003] ...1 168766.128385: binder_transaction_received: transaction=25155533
807</code></pre>
808    <h3 class="mume-header fontColor">no this message in db
809        Session E, this is the reply for TAG TT</h3>
810
811    <pre 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
812
813Binder:506_2-537   (  506) [003] ...1 168766.128413: binder_transaction_alloc_buf: transaction=25155534 data_size=68 offsets_size=0
814</code></pre>
815    <h2 class="mume-header fontColor">the dur of TAG TT is calcated by the
816        flowing msg</h2>
817
818    <pre class="font-text light fontColor"><code class="fontColor"> RenderThread-2267  ( 1592) [003] ...1 168766.128430: binder_transaction_received: transaction=25155534
819</code></pre>
820</div>
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