[llvm-bugs] [Bug 33832] New: cfi-icall + ThinLTO: no jump table entry created for functions defined in both ThinLTO module and merged module

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33832

            Bug ID: 33832
           Summary: cfi-icall + ThinLTO: no jump table entry created for
                    functions defined in both ThinLTO module and merged
                    module
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Interprocedural Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: peter at pcc.me.uk
                CC: llvm-bugs at lists.llvm.org

$ cat icall1.cpp
inline void f() {}

void sink(void (*)());

static struct A {
  A() { sink(f); }
} a;
$ cat icall2.cpp
inline void f() {}

void sink(void (*)()) {}

int main() {
  void (*p)() = f;
  p();
}
$ clang++ icall{1,2}.cpp -fsanitize=cfi-icall -flto=thin -fuse-ld=lld -O2 
-fno-sanitize-trap=cfi-icall -g
$ ./a.out 
icall2.cpp:7:3: runtime error: control flow integrity check for type 'void ()'
failed during indirect function call
/tmp/icall1.cpp:1: note: f() defined here

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20170718/0c8b25ff/attachment.html>