[LLVMdev] Objective-C code in lli

[Eric Brunstad]

Hi,

What would be an estimate for the amount of work required to implement  
this?  Where would I get started if I were to implement it?

My goal is to run Objective-C programs in the interpreter so I can  
provide an application-sandbox by disallowing the invocation of  
certain C-functions and also by disallowing the invocation of certain  
Objective-C methods.

Thanks,

Eric

On Oct 19, 2009, at 12:01 AM, Chris Lattner wrote:

>
> On Oct 18, 2009, at 6:32 PM, Eric Brunstad wrote:
>
>> Hi,
>>
>> Is it possible to run Objective-C code in lli?  lli does not seem  
>> to want to load Foundation.framework.
>
> It is definitely possible, but we're not there yet.  LLI would have  
> to know about objective-c metadata to register it properly with the  
> runtime.  This is important for things like classes etc.  This isn't  
> conceptually hard, but noone has done it yet.
>
> -Chris
>
>>
>> Please see below.
>>
>> Thanks,
>>
>> Eric Brunstad
>>
>> #import <Foundation/Foundation.h>
>>
>> int main(int argc, char *argv[])
>> {
>> 	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
>> 	NSLog(@"test!");
>> 	[pool drain];
>> 	return EXIT_SUCCESS;
>> }
>>
>> cmu-351714:llvm-2.5 ericbrunstad$ /Users/ericbrunstad/Downloads/ 
>> llvm-2.5/Release/bin/lli -force-interpreter=true -stats  /Users/ 
>> ericbrunstad/Desktop/test/test.o -load=/System/Library/Frameworks/ 
>> Foundation.framework/Foundation
>>
>> Could not resolve external global address:  
>> __CFConstantStringClassReference
>> 0   lli               0x0000000100687556 (anonymous  
>> namespace)::SignalHandler(int) + 470
>> 1   libSystem.B.dylib 0x00007fff83ee10aa _sigtramp + 26
>> 2   libSystem.B.dylib 0x0000000100a0b4ba _sigtramp + 2092082218
>> 3   lli               0x00000001001e8374  
>> llvm::ExecutionEngine::emitGlobals() + 6164
>> 4   lli               0x00000001001dbd69  
>> llvm::Interpreter::Interpreter(llvm::ModuleProvider*) + 185
>> 5   lli               0x00000001001dbdd8 llvm::Interpreter::create 
>> (llvm::ModuleProvider*, std::string*, bool) + 56
>> 6   lli               0x0000000100010803 main + 243
>> 7   lli               0x00000001000106e8 start + 52
>>
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>

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