similar to: [LLVMdev] mixing PIC/static with exception handling

I'm working on exception handling and having some trouble with type information. My personality/types work fine when running in the JIT, but when I produce object files and link them it fails. In particular, from an action record and the LSDA I get a type table entry. The problem is this doesn't appear to be pointing to a valid location. If I derefence it a segfault occurs. Are there

I am having some trouble getting my catch clauses to appear as expected in the dwarf exception tables. I have an instruction like this: %0 = landingpad i64 personality i32 (i32, i32, i64, i8*, i8*)* @leaf_exception_personality catch i8* inttoptr (i64 987 to i8*) catch i8* inttoptr (i64 2453 to i8*) In my exception handler I walk through the records. I always get the correct

I added several more clauses to see the result. It looks like the landing pad information is generated correctly: I get the correct number of action records, each record has a reasonable index into the type table (from 1 to 9). The encoded address increment in 4 however, which is unexpected since they are size 8 (in the JIT they increment by 8). Whatever is causing that may also be responsible for

On Oct 17, 2013, at 9:37 PM, edA-qa mort-ora-y <eda-qa at disemia.com> wrote: > I added several more clauses to see the result. It looks like the > landing pad information is generated correctly: I get the correct number > of action records, each record has a reasonable index into the type > table (from 1 to 9). The encoded address increment in 4 however, which > is

On 17/10/13 23:57, Bill Wendling wrote: > There shouldn't be any special linker flags you need to use. If > you're getting segfaults, it's probably trying to access the data at > an invalid location or something. Make sure that your EH table is > properly aligned. You might want to hand calculate the values to make > sure that they're correct. What platform are you

That makes it more mysterious then since I am indeed only calling a main function. Perhaps I have to invoke it a different way. Here's my call I have now: auto main = linker->getModule()->getFunction( "main" ); std::vector<llvm::GenericValue> args(2); args[0].IntVal = llvm::APInt( platform::abi_int_size, 0 ); args[1].PointerVal = nullptr; llvm::GenericValue gv =

Is there a way to get the size of a type in the IR assembly code? I know the size must be known since alloca and getelementptr both implicitly use it, but I don't see any way to get access to the size directly. I know my final compiler will have to get the size itself, but I'm just doing some simple tests directly in assembly now and am hoping there is an easy way to get the size of a

Yes, but why is it even copying the memory?  It already has a pointer which it can cast and load from -- and does so in other scenarios. I'm wondering whether this copying is somehow required and I'm missing something, or it's just an artifact of the clang emitter. That is, could it not omit the memcpy and cast the original variable? On 18/04/18 19:43, Krzysztof Parzyszek via

On Oct 17, 2013, at 11:35 AM, edA-qa mort-ora-y <eda-qa at disemia.com> wrote: > I'm working on exception handling and having some trouble with type > information. My personality/types work fine when running in the JIT, but > when I produce object files and link them it fails. > > In particular, from an action record and the LSDA I get a type table > entry. The

I'm creating a struct of `{i8,i64}` and `DataLayout::getTypeAllocSize` is returning `12`. `getStructLayout` also gives an `4` offset for the second element. The native ABI, and clang, for the same type are producing a size of 16, with an alignment of 8, for the second element. This is for the system triple "x86_64-linux-gnu" What could be causing this difference in alignment and

It was the return type which was i64. I changed it also to my abi_int_size and it works now. I have to take care of a few other type translations, but it looks like MCJIT is working now. Thank you. On 08/11/13 18:12, Yaron Keren wrote: > Something must be wrong with the Function Type. Try to debug into > runFunction to see which if condition fails. > Just a guess, if this is on 64

I think I see a potential issue. My ExecutionEngine setup may not be using the same target as my object code emitting, and in this test case I'm running in the ExecutionEngine.  I'll go over this code to ensure I'm creating the same triple and see if that helps -- I'm assuming it will, since I can't imagine the exact same triple with clang would produce a different layout. On

Something must be wrong with the Function Type. Try to debug into runFunction to see which if condition fails. Just a guess, if this is on 64 bit system the first argument type may be int64 but needs to be int32. Yaron 2013/11/8 edA-qa mort-ora-y <eda-qa at disemia.com> > That makes it more mysterious then since I am indeed only calling a main > function. Perhaps I have to invoke

I have some exception handling which works fine using the JIT. Now I am producing object files and linking them, but the exception handling tables seem to be missing. I call _Unwind_RaiseException and get _URC_END_OF_STACK as a result. I produce my object file using TargetMachine::addPassesToEmitFile and then I link my resulting files with: gcc -o prog input.o -fexceptions I'm sure I'm

It sounds like your DataLayout may not match clang's for x86_64-linux. What does it say about the alignment of i64? On Wed, Apr 18, 2018 at 12:05 PM edA-qa mort-ora-y via llvm-dev < llvm-dev at lists.llvm.org> wrote: > I'm creating a struct of `{i8,i64}` and `DataLayout::getTypeAllocSize` > is returning `12`. `getStructLayout` also gives an `4` offset for the > second

Yes, I understand that as well (it's what I'm trying to recreate in my language now). I'm really wondering why it does the copy, since from what I can tell it could just as easily cast the original value and do the load without the memcpy operation. That is, the question is about the memcpy and extra alloca -- I understand what it's doing, just not why it's doing it this way.

I'm having a problem with my code generating empty lines and it appears to be the CLib `open` function generating an empty line when used within the JIT-VM. If I compile my program to an exe file it doesn't happen. I also have a lot of other code running in the VM without this problem, it's somehow particular to `open`. A chunk of my IR that calls `open`: defer_body_26:

I'm trying to get MCJIT working but I get the following errors: Full-featured argument passing not supported yet! UNREACHABLE executed at MCJIT.cpp:322! I'm sure the first one will be a problem, but the second one prevents me from testing anything. I don't know how to fix the problem. My code works when using the non-MC JIT, and I added to my EngineBuilder: .setUseMCJIT(true)

I'm having trouble figuring out what the error "Instruction does not dominate all uses!" means. I'm trying to construct a call to a function with two parameters. The printed IR, with error, looks like this: define i32 @add(i32, i32) { EntryBlock: %2 = add i32 %0, %1 ret i32 %2 } define i32 @eval_expr() { EntryBlock: ret i32 <badref> } Instruction does not dominate

Does this help? http://nondot.org/sabre/LLVMNotes/SizeOf-OffsetOf-VariableSizedStructs.txt On 11 Nov 2012, at 10:52, edA-qa mort-ora-y <eda-qa at disemia.com<mailto:eda-qa at disemia.com>> wrote: Is there a way to get the size of a type in the IR assembly code? I know the size must be known since alloca and getelementptr both implicitly use it, but I don't see any way to get