如何取消分配llvm :: module [英] How to deallocate llvm::module

问题描述

我有一个基于Kaleidoscope教程的使用LLVM生成和运行代码的小型语言解析器.

I have a small language parser that uses LLVM to generate and run code, based on the Kaleidoscope tutorial.

我的约束是我必须重新创建模块，因为我需要多次处理同一个输入文件，并且在第一次编译后，LLVM会抱怨该模块已经包含函数，x等.看到的是在两者之间重新创建模块，这意味着我也必须重新创建ExecutionEngine.

My constraint is that I have to recreate the module because I need to process the same input file multiple times, and after the first compilation, LLVM would complain about the module already containing functions, x, etc. The only way forward I see is to recreate the module in between, and this means that I have to recreate ExecutionEngine as well.

但是，我想消除大量内存泄漏.如何正确解除llvm::Module和llvm::ExecutionEngine的分配?

However, there are a huge amount of memory leaks occurring which I want to get rid of. How do I properly deallocate the llvm::Module and llvm::ExecutionEngine ?

如果我简单地删除两者，则它会在LLVM中某处出现段错误.我当前的实现是这样的:

If I simply delete both, it segfaults somewhere in LLVM. My current implementation goes like this:

TheExecutionEngine->removeModule(module);
delete module();
delete TheExecutionEngine;

但是，仍然有大约14000个泄漏报告，所以这似乎是错误的.

However, there are still about 14000 leaks reported, so this seems wrong.

我不需要在模块中复制任何现有功能.我只想要一个新鲜的，空的.

I do not need to duplicate any existing functions in a module. I just want a fresh, empty one.

推荐答案

如果我对您的理解正确，那么您希望在程序的生命周期内多次创建ExecutionEngine和Module实例，并对其进行正确清理.

If I understood you correctly, you want to create ExecutionEngine and Module instances multiple times during the lifetime of your program, and clean them up properly.

请勿单独删除模块，因为一旦addModule，ExecutionEngine就会拥有"它.这意味着它将负责删除和清理.

Do not delete the Module separately, since ExecutionEngine "owns" it once you addModule. This means it will take care of deleting and cleaning up.

在LLVM中，最好总是从示例中学习.我建议您看一下tools/lli/lli.cpp的源代码，它可以完成所有需要的工作，包括清理工作.

In LLVM it's always best to learn from examples. I suggest you take a look at the source code of tools/lli/lli.cpp, which does all of what you need, including cleanup.

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