Java 堆栈保护可能已禁用？
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Stack guard might have disabled?
提问by Lemon Juice
I am trying to run the first example in rootbeerlibrary, which you can find from here.
我正在尝试运行rootbeer库中的第一个示例，您可以从这里找到。
The issue is, even though I followed all of their instructions, I am getting the following message when I am trying to run the Jar
问题是，即使我遵循了他们的所有说明，当我尝试运行 Jar 时还是收到以下消息
root@ubuserver3:/home/ubuadmin/JavaJars/HelloWordGPU# java -jar HelloWorldGPU.jar
OpenJDK Client VM warning: You have loaded library /usr/lib/libcuda.so.319.37 which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
Exception in thread "main" java.lang.NullPointerException
at org.trifort.rootbeer.runtime.Rootbeer.run(Rootbeer.java:104)
at ScalarMult.test(ScalarMult.java:13)
at Main.main(Main.java:17)
I am not a Linux person, so I do not understand how to execute this command properly. I also don't understand what they mean by that message, because this is the first time I am on GPU programming. But I know messing with GPU with wrong commands would be a problem.
我不是 Linux 人，所以我不明白如何正确执行这个命令。我也不明白他们所说的消息是什么意思，因为这是我第一次进行 GPU 编程。但我知道用错误的命令弄乱 GPU 会是一个问题。
回答by absenthecon
Type: execstack --versionto check if you already have execstack installed.
键入：execstack --version检查您是否已经安装了 execstack。
If you get command not found type: sudo apt-get install execstack -y --force-yes
如果找不到命令，请键入： sudo apt-get install execstack -y --force-yes
Type sudo execstack -c <file>e.g sudo execstack -c /usr/lib/libcuda.so
输入sudo execstack -c <file>例如sudo execstack -c /usr/lib/libcuda.so
回答by Pranav V R
1: Check execstack version using following command to find execstack installed or not
1：使用以下命令检查 execstack 版本以查找 execstack 安装与否
execstack --version
2: If execstack not installed then install using following command
2：如果没有安装execstack，则使用以下命令安装
sudo apt-get install execstack -y --force-yes
3: After successful installation execute following command
3：安装成功后执行以下命令
sudo execstack -c <filepath>
eg:sudo execstack -c /usr/lib/libjpcap.so
例如：sudo execstack -c /usr/lib/libjpcap.so
回答by andrej
make sure you are not running 32-bit jar on 64-bit jvm first
确保您没有先在 64 位 jvm 上运行 32 位 jar
回答by dhuie
Make sure you are not running 32-bit Java. If you run java -d64, the 32-bit version will print an error.
确保您运行的不是 32 位 Java。如果您运行 java -d64，32 位版本将打印错误。
