[Bug translator/13784] New: Cannot find a defining variable location in different CU

[mjw at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=13784

             Bug #: 13784
           Summary: Cannot find a defining variable location in different
                    CU
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap@sourceware.org
        ReportedBy: mjw@redhat.com
    Classification: Unclassified


Take the following code:

::::::::::::::
distance.c
::::::::::::::
static int value;

void setdistance(int v) { value = v; }
int getdistance() { return value; }

::::::::::::::
speed.c
::::::::::::::
static int value;

void setspeed(int v) { value = v; }
int getspeed() { return value; }

::::::::::::::
main.c
::::::::::::::
#include <stdio.h>

void setspeed(int v);
int getspeed();
void setdistance(int v);
int getdistance();

static print_value (int value)
{
  printf("value: %d\n", value);
}

static int calculate_value ()
{
  return getdistance () / getspeed ();
}

int main (int argc, char **argv)
{
  int value;

  setspeed (6);
  setdistance (60);

  value = calculate_value ();
  print_value (value);

  return 0;
}

Note that there are various variables "value" in play here. The example above
is deliberately setup to show all the pitfalls. But the issue is the same for
having a global variable in one CU/file and wanting to use/probe it in another
CU. A simple $value will not find it.

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.