[Qemu-devel] [Bug 696834] Invitation to connect on LinkedIn

[Paulo Cezar A Junior]

LinkedIn
------------

   
Bug,

I'd like to add you to my professional network on LinkedIn.

- Paulo

Paulo Cezar
Platform Researcher and Developer at INdT 
São Paulo Area, Brazil

Confirm that you know Paulo Cezar
https://www.linkedin.com/e/-g11m92-go1e59vx-23/isd/2968180228/v_gmfnNW/


 
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https://bugs.launchpad.net/bugs/696834

Title:
  FP exception reporting not working on NetBSD host

Status in QEMU:
  New

Bug description:
  I recognize that NetBSD is not one of the officially supported host
  OS.  However, qemu 0.13.0 is available in the NetBSD pkgsrc
  collection, and works quite well.  Well, with one exception (pun
  intended): It seems that Floating Point exceptions don't get reported
  properly.

  The following code-snippet demonstrates the problem:

  
  volatile int flt_signal = 0;

  static sigjmp_buf sigfpe_flt_env;
  static void
  sigfpe_flt_action(int signo, siginfo_t *info, void *ptr)
  {
          flt_signal++;
  }

  void trigger(void)
  {               
          struct sigaction sa;
          double d = strtod("0", NULL);
          
          if (sigsetjmp(sigfpe_flt_env, 0) == 0) {
                  sa.sa_flags = SA_SIGINFO;
                  sa.sa_sigaction = sigfpe_flt_action;
                  sigemptyset(&sa.sa_mask);
                  sigaction(SIGFPE, &sa, NULL);
                  fpsetmask(FP_X_INV|FP_X_DZ|FP_X_OFL|FP_X_UFL|FP_X_IMP);
                  printf("%g\n", 1 / d);
          }
          printf("FPE signal handler invoked %d times.\n");
  }