jdk8-mips64-public/hotspot: diff agent/doc/cireplay.html

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/agent/doc/cireplay.html	Wed Apr 27 01:25:04 2016 +0800
     1.3 @@ -0,0 +1,41 @@
     1.4 +<html>
     1.5 +<head>
     1.6 +<title>
     1.7 +Replay
     1.8 +</title>
     1.9 +</head>
    1.10 +<body>
    1.11 +
    1.12 +<h1>Compiler replay</h1>
    1.13 +<p>
    1.14 +The compiler replay is a function to repeat the compiling process from a crashed java process in compiled method<br>
    1.15 +This function only exists in debug version of VM
    1.16 +</p>
    1.17 +<h2>Usage</h2>
    1.18 +<pre>
    1.19 +First, use SA to attach to the core file, if succeeded, do
    1.20 +       hsdb&gt; dumpreplaydata &lt;address&gt; | -a | &lt;thread_id&gt; [&gt; replay.txt]
    1.21 +       create file replay.txt, address is address of Method, or nmethod(CodeBlob)
    1.22 +       hsdb&gt; buildreplayjars [all | boot | app]
    1.23 +       create files:
    1.24 +         all:
    1.25 +           app.jar, boot.jar
    1.26 +         boot:
    1.27 +           boot.jar
    1.28 +         app:
    1.29 +           app.jar
    1.30 +       exit SA now.
    1.31 +Second, use the obtained replay text file, replay.txt and jar files, app.jar and boot.jar, using debug version of java
    1.32 +       java -Xbootclasspath/p:boot.jar -cp app.jar -XX:ReplayDataFile=&lt;datafile&gt; -XX:+ReplayCompiles ....
    1.33 +       This will replay the compiling process.
    1.34 +
    1.35 +       With ReplayCompiles, the replay will recompile all the methods in app.jar, and in boot.jar to emulate the process in java app.
    1.36 +
    1.37 +notes:
    1.38 +       1) Most time, we don't need the boot.jar which is the classes loaded from JDK. It will be only modified when an agent(JVMDI) is running and modifies the classes.
    1.39 +       2) If encounter error as "&lt;flag&gt;" not found, that means the SA is using a VMStructs which is different from the one with corefile. In this case, SA has a utility tool vmstructsdump which is located at agent/src/os/&lt;os&gt;/proc/&lt;os_platform&gt;
    1.40 +
    1.41 +       Use this tool to dump VM type library:
    1.42 +       vmstructsdump libjvm.so &gt; &lt;type_name&gt;.db
    1.43 +
    1.44 +       set env SA_TYPEDB=&lt;type_name&gt;.db (refer different shell for set envs)
Mercurial > jdk8-mips64-public > hotspot / file diff

diff: agent/doc/cireplay.html

agent/doc/cireplay.html
