在LLVM 2.8中调用LLVM bitcode函数(Calling LLVM bitcode function in LLVM 2.8)

 我正在尝试读取并调用从LLVM 2.8中的LLVM bitcode解析的函数。 我的一切都与实际的通话有关，这会使程序崩溃。 
 
 首先我有这个C代码： 
 
void hello() {}
 
 我编译了这个： 
 
llvm-gcc -c -emit-llvm hello.c -o hello.bc
 
 这是一个应该读取的代码的精简版本： 
 
using namespace std;
using namespace llvm;

void callFunction(string file, string function) {
  InitializeNativeTarget();

  LLVMContext context;
  string error;

  MemoryBuffer* buff = MemoryBuffer::getFile(file);
  Module* m = getLazyBitcodeModule(buff, context, &error);

  // Check the module parsed here.
  // ...

  ExecutionEngine* engine = ExecutionEngine::create(m);

  // Check the engine started up correctly here.
  // ...

  Function* func = m->getFunction(function);

  // Check the function was found here.
  // ..

  vector<GenericValue> args(0);

  // This is what crashes.
  engine->runFunction(func, args);
}
 
 我已经包含了大量的LLVM头文件，包括ExecutionEngine / JIT.h，以及每一步的代码检查，以确保值不为NULL。 它解析了bitcode，我检查了它发现的函数，以确认它是否符合预期。 
 
 我也尝试过自己构建一个模块和函数，它按预期工作，所以问题肯定来自于函数是由bitcode产生的。 

I'm trying to read and call a function parsed from LLVM bitcode in LLVM 2.8. I have everything working apart from the actual call, which crashes the program.
 
First I have this C code:
 
void hello() {}
 
I've compiled this with:
 
llvm-gcc -c -emit-llvm hello.c -o hello.bc
 
Here's a trimmed down version of the code that's supposed to read it:
 
using namespace std;
using namespace llvm;

void callFunction(string file, string function) {
  InitializeNativeTarget();

  LLVMContext context;
  string error;

  MemoryBuffer* buff = MemoryBuffer::getFile(file);
  Module* m = getLazyBitcodeModule(buff, context, &error);

  // Check the module parsed here.
  // ...

  ExecutionEngine* engine = ExecutionEngine::create(m);

  // Check the engine started up correctly here.
  // ...

  Function* func = m->getFunction(function);

  // Check the function was found here.
  // ..

  vector<GenericValue> args(0);

  // This is what crashes.
  engine->runFunction(func, args);
}
 
I've included plenty of LLVM headers, including ExecutionEngine/JIT.h, and the code checks at each step to make sure values aren't NULL. It parses the bitcode, and I have examined the function it finds to confirm it was as expected.
 
I've also tried building a module and function myself, which works as expected, so the problem definitely arises from the fact that the function is produced by the bitcode.

原文：https://stackoverflow.com/questions/4755172