SVF-example project reports error when compiled with LLVM under Debug mode.

[yuffon]

I compile SVF-example project with LLVM 14 under Debug mode.
The program meets an error:

svf-example: /home/yuffon/data/programs/svf2.9-debug-install/include/svf/SVF-LLVM/LLVMModule.h:219: SVF::SVFInstruction *SVF::LLVMModuleSet::getSVFInstruction(const SVF::Instruction *) const: Assertion `it!=LLVMInst2SVFInst.end() && "SVF Instruction not found!"' failed.

The input good.ll file is as follows.

; ModuleID = 'good.c'
source_filename = "good.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  store i32 0, i32* %1, align 4
  ret i32 1
}

attributes #0 = { noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2}
!llvm.ident = !{!3}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 7, !"uwtable", i32 1}
!2 = !{i32 7, !"frame-pointer", i32 2}
!3 = !{!"clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)"}

LLVM14 + release mode, gcc + debug/release mode do not report this error.

Is there something wrong?

[yuleisui]

Not sure why. Looks odd. You could do a printing to debug a bit.

how about llvm-16?

[yuffon]

Not sure why. Looks odd. You could do a printing to debug a bit.

how about llvm-16?

I have not tested llvm 16 because the other parts of my project need llvm 14.

The stack is

SVF::LLVMModuleSet::getSVFInstruction(const llvm::Instruction *) const LLVMModule.h:219
__GI_abort 0x000014d2b4ef0859
__assert_fail_base 0x000014d2b4ef0729
__GI___assert_fail 0x000014d2b4f01fd6
SVF::LLVMModuleSet::getSVFInstruction(const llvm::Instruction *) const LLVMModule.h:219
SVF::LLVMModuleSet::initSVFBasicBlock(const llvm::Function *) LLVMModule.cpp:376
SVF::LLVMModuleSet::initSVFFunction() LLVMModule.cpp:309
SVF::LLVMModuleSet::build() LLVMModule.cpp:162
SVF::LLVMModuleSet::buildSVFModule(const std::vector<…> &) LLVMModule.cpp:124
main svf-ex.cpp:162
__libc_start_main 0x000014d2b4ef2083
_start 0x000000000042658e

[yuleisui]

Your bc code is small enough. Can you debug to see why the map retrieval failed? I am not able to debug it for you at the moment

[yuffon]

VFBasicBlock(const llvm::Function *) LLVMModule

Hi @yuleisui , I follow SVF::LLVMModuleSet::build() line by line.

I see in createSVFDataStructure(); -> createSVFFunction(func) -> addInstructionMap(&inst, svfInst); -> LLVMInst2SVFInst[inst] = svfInst;,
the first instruction of function main in good.ll, i.e., alloca, is added into LLVMInst2SVFInst.
But in
initSVFFunction(); ->initSVFBasicBlock(&f); -> LLVMUtil::getNextInsts(inst, getSVFInstruction(inst)->getSuccInstructions()); ->LLVMInst2SVFInstMap::const_iterator it = LLVMInst2SVFInst.find(inst);,
LLVMInst2SVFInst.find() returns nothing.

It is odd. If I use GCC to compile SVF-example, everything is OK.
But llvm 14 as compiler would report this error.

[yuffon]

Your bc code is small enough. Can you debug to see why the map retrieval failed? I am not able to debug it for you at the moment

It seems like a bug when SVF 2.9 works with LLVM 14.
I add some print statements, the error disappears but a new error occurs.

Then I add
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0")
to SVF top CMakeLists. Everything is OK.

[yuffon]

add
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0")
to SVF top CMakeLists

[yuleisui]

How about llvm-16?

[yuffon]

set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0")

I didn't try LLVM 16 because other parts of my projects need llvm 14.