[Lldb-commits] [PATCH] D54221: Add setting to require hardware breakpoints.

[Kamil Rytarowski via Phabricator via lldb-commits]

krytarowski added a comment.

On NetBSD one has to check PaX MPROTECT property of a traced process.

Something like:

  bool IsMPROTECT(pid_t pid) {
  #if defined(__NetBSD__)
    int mib[3];
    int paxflags;
    size_t len = sizeof(paxflags);
  
    mib[0] = CTL_PROC;
    mib[1] = pid;
    mib[2] = PROC_PID_PAXFLAGS;
  
    if (sysctl(mib, 3, &paxflags, &len, NULL, 0) != 0)
      err(EXIT_FAILURE, "sysctl"); /* or return true */
  
    return !!(paxflags & CTL_PROC_PAXFLAGS_MPROTECT);
  #else
    return false;
  #endif
  }

If IsMPROTECT is true, then we must use hardware assisted/emulated breakpoints.


Repository:
  rLLDB LLDB

https://reviews.llvm.org/D54221