“无法附加到远程 VM”将 jdb 连接到 Windows 上的 android 模拟器
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"Failed to attach to the remote VM" connecting jdb to the android emulator on Windows
提问by Tim Barrass
I've been trying to connect jdb to the android emulator for a little while, and have been met repeatedly with:
我一直在尝试将 jdb 连接到 android 模拟器一段时间，并且反复遇到：
jdb -sourcepath ./src -attach localhost:8700
java.io.IOException: shmemBase_attach failed: The system cannot find the file specified
at com.sun.tools.jdi.SharedMemoryTransportService.attach0(Native Method)
at com.sun.tools.jdi.SharedMemoryTransportService.attach(SharedMemoryTransportService.java:90)
at com.sun.tools.jdi.GenericAttachingConnector.attach(GenericAttachingConnector.java:98)
at com.sun.tools.jdi.SharedMemoryAttachingConnector.attach(SharedMemoryAttachingConnector.java:45)
at com.sun.tools.example.debug.tty.VMConnection.attachTarget(VMConnection.java:358)
at com.sun.tools.example.debug.tty.VMConnection.open(VMConnection.java:168)
at com.sun.tools.example.debug.tty.Env.init(Env.java:64)
at com.sun.tools.example.debug.tty.TTY.main(TTY.java:1010)
Fatal error:
Unable to attach to target VM.
Not so great. What's the best way of getting round this? I'm running on Windows 7 64bit.
不太好。解决这个问题的最佳方法是什么？我在 Windows 7 64 位上运行。
回答by Tim Barrass
Currently this is working for me -- making a socket rather than a shared memory connection.
目前这对我有用 - 制作套接字而不是共享内存连接。
>jdb –sourcepath .\src -connect com.sun.jdi.SocketAttach:hostname=localhost,port=8700
>jdb –sourcepath .\src -connect com.sun.jdi.SocketAttach:hostname=localhost,port=8700
Beforehand you need to do some setup -- for example, see this set of useful details on setting up a non-eclipse debugger. It includes a good tip for setting your initial breakpoint -- create or edit a jdb.ini file in your home directory, with content like:
事先您需要进行一些设置——例如，请参阅这组有关设置非 Eclipse 调试器的有用详细信息。它包括设置初始断点的一个很好的技巧——在您的主目录中创建或编辑 jdb.ini 文件，其内容如下：
stop at com.mine.of.package.some.AClassIn:14
and they'll get loaded and deferred until connection.
他们将被加载并推迟到连接。
edit: forgot to reference Herong Yang's page.
编辑：忘了参考和荣杨的页面。
回答by Zack Morris
Try quitting Android Studio.
尝试退出 Android Studio。
I had a similar problem on the Mac due to the ADB daemon already running. Once you quit any running daemons, you should see output similar to the following:
由于 ADB 守护进程已经在运行，我在 Mac 上遇到了类似的问题。退出任何正在运行的守护程序后，您应该会看到类似于以下内容的输出：
$ adb -d jdwp
28462
1939
^C
$ adb -d forward tcp:7777 jdwp:1939
$ jdb -attach localhost:7777 -sourcepath ./src
Set uncaught java.lang.Throwable
Set deferred uncaught java.lang.Throwable
Initializing jdb ...
>
See my other answerto a similar question for more details and how to start/stop the daemon.
回答by ic205
In order to debug application follow this steps:
为了调试应用程序，请按照以下步骤操作：
Open the application on the device.
打开设备上的应用程序。
Find the PID with jdwp (make sure that 'android:debuggable' is set to true in the manifest):
使用 jdwp 查找 PID（确保清单中的 'android:debuggable' 设置为 true）：
adb jdwp
Start JVM with the following parameters:
使用以下参数启动JVM：
java -agentlib:jdwp=transport=dt_shmem,server=y,address=<port> <class>
Expected output for this command:
此命令的预期输出：
Listening for transport dt_shmem at address: <port>
Use jdb to attach the application:
使用 jdb 附加应用程序：
jdb -attach <port>
If jdb successful attached we will see the jdb cli.
如果 jdb 成功附加，我们将看到 jdb cli。
Example:
例子：
> adb jdwp
12300
> java -agentlib:jdwp=transport=dt_shmem,server=y,address=8700 com.app.app
Listening for transport dt_shmem at address: 8700
> jdb -attach 8700
main[1]
回答by Mark Storer
Answer #1: Map localhost in your hosts file, as I linked to earlier. Just to be sure.
答案 #1：在您的主机文件中映射 localhost，正如我之前链接的那样。只是要确定。
Answer #2: If you're using shared memory, bit-size could easily become an issue. Make sureyou're using the same word width everywhere.
答案#2：如果您使用共享内存，位大小很容易成为一个问题。请确保你使用的宽度处处相同的单词。
