[llvm-bugs] [Bug 48938] New: lli with -jit-kind=orc-lazy can't symbol 'atexit' for c++ program

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Fri Jan 29 03:03:05 PST 2021


https://bugs.llvm.org/show_bug.cgi?id=48938

            Bug ID: 48938
           Summary: lli with -jit-kind=orc-lazy can't symbol 'atexit' for
                    c++ program
           Product: tools
           Version: 11.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: lli
          Assignee: unassignedbugs at nondot.org
          Reporter: harry.linxd at gmail.com
                CC: llvm-bugs at lists.llvm.org

$ cat main.cpp 

```
#include <iostream>

int main(int argc, char** argv) {
    std::cout << "hi c++ from jit: " << argv[0] << std::endl;
    return 0;
}
```

Compile with 'no-use-cxa-atexit'
$ clang++ -S -emit-llvm main.cpp -stdlib=libstdc++ -fno-use-cxa-atexit

the 'main.ll' load fine with lli 'orc-mcjit' and 'mcjit'
$ lli --jit-kind=orc-mcjit ./main.ll 
hi c++ from jit: ./main.ll

$lli --jit-kind=mcjit ./main.ll 
hi c++ from jit: ./main.ll

while with orc-lazy, I get undefined symbol

$lli --jit-kind=orc-lazy ./main.ll 
JIT session error: Symbols not found: [ atexit ]
JIT session error: Failed to materialize symbols: { (0x23e0c50, {
__orc_lcl.__cxx_global_var_init.0, _GLOBAL__sub_I_main.cpp }) }

The issue can be found on both clang10 and clang11.

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