similar to: [LLVMdev] How to halt a program

Victor Campos wrote: > Guys, > > I would like to instrument the bytecode that LLVM produces with > assertions. I have written the instrumentation code manually, but I do > not know how to halt the program in case the assertion is false. I took > a look into the bytecode that LLVM produces for a program like: > > #include <stdlib.h> > int main() { >

Hi, all, I managed to insert the assertion in my bytecode, but the result is not really what I expected :( Let me do a quick recap: I am trying to instrument the bytecode with some assertions, and to do this, I want to insert the abort() function into the bytecode. The problem is that LLVM is creating a new abort() function, instead of using the one that already exists in libc. Let me

Hi Joshua, I have a function foo and I want to insert exit(0) at the end of foo. The problem is M.getFunction returns null, which is understandable. I am not sure what to do. Below is the code snippet. void foo(int argc, char* argv[]) { printf("hello world\n"); exit(0); //***I want to insert this exit } My llvm code snippet is vector<const Type *> params =

Hi, I want to insert a function with a void type parameter, for example: int foo(void); OI declared fcall2 = M.getOrInsertFunction("foo", IntegerType::get(M.getContext(), 32), Type::getVoidTy(M.getContext())); then the question is how to get the void type value to make the CallInst inserted sucessfully? (what should be ********) CallInst::Create(fcall2, ******,

Hi, sivart Thanks for pointing it out. I used it, and it works. Thank you again. BTW, for any later reference, the function prototype declaration with no arguments is not what I wrote: fcall2 = M.getOrInsertFunction("foo", IntegerType::get(M.getContext(), 32), Type::getVoidTy(M.getContext())); INSTEAD, I changed to : fcall2 = M.getOrInsertFunction("foo",

Hi Shuying, You will find in the documentation that amongst the overloaded CallInst::Create()'s there is one that takes no function arguments: static CallInst* llvm::CallInst::Create ( Value * F, const Twine & NameStr, BasicBlock * InsertAtEnd); Regards On 23/11/2010, at 11:20 AM, Shuying Liang wrote: > Hi, I want to insert a function with a void type parameter, > for example:

On Thu, Mar 31, 2011 at 9:31 PM, George Baah <georgebaah at gmail.com> wrote: > Hi Joshua, >       I have a function foo and I want to insert exit(0) at the end of foo. > The problem is M.getFunction returns null, which is understandable. I am not > sure what to do. Below is the code snippet. > void foo(int argc, char* argv[]) { >   printf("hello world\n"); >

I'm trying to just emit simple inline assembler (no constraints, inputs, etc.) Can anyone point me to an example of this..? This is corresponding to: __asm__ ("mfc1 $4,$f12"); This is what I tried but it's not correct. std::vector<llvm::Type *> AsmArgTypes; llvm::FunctionType *AsmFTy = llvm::FunctionType::get(Type::getVoidTy(FStub->getContext()),

Dear All I'm making an instrumentation pass. The pass is supposed to modify the given IR in a specefic way. One of the required modifications is to insert a call to a function at a specific location. This is the signature of the called function: void myclass::foo(Function *f, BasicBlock* b) This function's prototype is in an foofile.h file in include/llvm And the function

Hi, I stumbled upon a strange thing regarding types and module linking, which I don't quite get, so maybe someone around here can enlighten me. Consider the following code, which will create 2 modules m1 and m2, and a named structured type %T = { i32 }; m1 contains only a function definition f(%T), m2 contains a function declaration f(%T) and a function definition h(%T), where h will call f

Hi George, Could you be a more specific about what you are trying to do, how you are trying to do it, and what is failing. A couple of relevant snippets of code would do wonders in helping you. Thanks, Joshua On Wed, Mar 30, 2011 at 3:59 PM, George Baah <georgebaah at gmail.com> wrote: > Hi Everyone, > I am trying to insert an exit function into my IR. > However, I thought

Hi Everyone, I am trying to insert an exit function into my IR. However, I thought I can get access to exit by using Module.getOrInsertFunction or Module.getFunction. However, I am getting a null value returned. I have searched through the llvmdev archives but not found any thing that addresses this question. Any help will be greatly appreciated. Thanks. George -------------- next part

Hello, everyone I am new to LLVM, now I got a problem I want to add a function call before sleep(int a, int b) code below #include <stdio.h> int sleep(int a, int b) { return a+b; } int main(int argc, char **argv) { sleep(1,2); } after use opt -load ../llvm-2.8/Release+Asserts/lib/bishe_insert.so -bishe_insert <1.bc> 2.bc I want get the code #include <stdio.h>

On 08/24/2017 09:40 AM, Tim Northover wrote: > On 17 August 2017 at 15:15, Rodney M. Bates via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> For an indirect call, i.e., on a function whose address is runtime variable, >> I can't find any place/way to attach this attribute. LLVMAddAttribute >> won't take a type. > > In the C++ API you'd add the

Hi, I am new to LLVM and interested in using LLVM to work on a research project for my Master's degree. My idea is following - 1. I have a simple C program basic.c - #include <stdio.h> int main() { printf("Hello World"); return 0; } 2. I will generate IR byte code for this basic.c using - llvm-gcc -emit-llvm -S basic.c This will give me basic.s which has IR byte code

Hi, I'm trying to get my head around c++ - IR - c++ API and getting used tramform manual information to code. The manual states alloca is defined for <type>. FunstionType is a type, so alloca for functionType should be possible? Not? If we have a valid Module *m we can get an allocate instruction allocating space for a non-argumented function as follows: AllocaInst* pa2 = new

Hi, Not sure whether this matches your use case, but the Orc-based JIT used in LLI appears to be using `llvm::orc::LocalCXXRuntimeOverrides` (http://llvm.org/doxygen/classllvm_1_1orc_1_1LocalCXXRuntimeOverrides.html) to override `__cxa_atexit`: https://github.com/llvm-mirror/llvm/blob/release_50/tools/lli/OrcLazyJIT.h#L74

Akshay Jain <jivan.molu at gmail.com> writes: > I have tried it, but I always end up with some kind of error. Can you > explain how can I get a function type for function which returns void > (nothing) and it's arguments are (int, int, int, void *, void *, ...) ?? Instead of getting something to cut&paste, you would be much more enriched if the problematic code and the

I have tried it, but I always end up with some kind of error. Can you explain how can I get a function type for function which returns void (nothing) and it's arguments are (int, int, int, void *, void *, ...) ?? Thanks in advance. On Tue, Apr 16, 2013 at 7:22 AM, Óscar Fuentes <ofv at wanadoo.es> wrote: > Akshay Jain <jivan.molu at gmail.com> writes: > > > I am

I am trying to get a handle on IR builder, at least some basics. I ran through a tutorial here: Create a working compiler with the LLVM framework, Part 1 <http://www.ibm.com/developerworks/library/os-createcompilerllvm1/>, and it worked well enough. I have some simple code that creates a hello world IR. I am trying to now bring in some concepts from the Kaleidoscope tutorial, namely