[llvm-bugs] [Bug 44095] New: ShadowCallStack crashing with exception handling

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44095

            Bug ID: 44095
           Summary: ShadowCallStack crashing with exception handling
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: AArch64
          Assignee: unassignedbugs at nondot.org
          Reporter: leonardchan at google.com
                CC: arnaud.degrandmaison at arm.com,
                    llvm-bugs at lists.llvm.org, peter.smith at linaro.org,
                    Ties.Stuij at arm.com

Shadow call stack seems to be conflicting with exception handling:

```
#include <iostream>
int main () {
  try {
    throw 20;
  } catch (int e) {
    std::cout << "An exception occurred. Exception Nr. " << e << '\n';
  }
  return 0;
}
```

In this case, compiling with 

```
$ prebuilt/third_party/clang/linux-x64/bin/clang++ -std=c++17 ~/misc/test.cpp
-fno-sanitize=safe-stack -target aarch64-unknown-linux-gnu -ffixed-x18
--sysroot=prebuilt/third_party/sysroot/linux/ -g
```

then running prints 20 normally, but appending `-fsanitize=shadow-call-stack`
to the end causes a segfault.

-- 
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/20191120/e3c6ead0/attachment.html>