BUG: Conditional Breakpoint Doesn't Break on CodeView Restart (116316)

SYMPTOMS

When you (1) use "Break At Location If Expression Has Changed", (2) run your application in CodeView for Windows, and then (3) restart the debugging session, you may find that the conditional breakpoint is no longer hit.

RESOLUTION

To work around this problem, clear the breakpoint and reset it after restarting the debugging session. If you have Visual C++, you can also use its integrated debugger because it does not have this problem.

STATUS

Microsoft has confirmed this to be a bug in CodeView for Windows. We are researching this problem and will post new information here in the Microsoft Knowledge Base as soon as it becomes available.

This problem does not occur under CodeView for MS-DOS or the Visual Workbench debugger.

MORE INFORMATION

The sample program below demonstrates this bug. After building a Windows debug version, load the program into CodeView for Windows and type these commands into the command window:

>p2
>bp .16,=S.uc
>g
>l
>g

The bp command sets a breakpoint at line 16 if S.uc has changed; g runs the application; the l command restarts the application.

Sample Code

/* Compile options needed:  /G2 /GA /Zi /Od
*/ 

   #include <windows.h>

   #define UCHAR unsigned char

   void main( void )
   {
    struct tagS
    {
     UINT  ui;
     UCHAR uc;
     LONG  li;
    } S;

    S.ui = 45;
    S.uc = 65;
    S.li = 100000L;
   }