mingw/info/gdb/Error-in-Breakpoints.html

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  12 Node:<a name="Error%20in%20Breakpoints">Error in Breakpoints</a>,
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  18 <h4 class="subsection">"Cannot insert breakpoints"</h4>
  19
  20    <p>Under some operating systems, breakpoints cannot be used in a program if
  21 any other process is running that program.  In this situation,
  22 attempting to run or continue a program with a breakpoint causes
  23 GDB to print an error message:
  24
  25 <pre class="example">     Cannot insert breakpoints.
  26      The same program may be running in another process.
  27      </pre>
  28
  29    <p>When this happens, you have three ways to proceed:
  30
  31      <ol type=1 start=1>
  32 <li>Remove or disable the breakpoints, then continue.
  33
  34      <li>Suspend GDB, and copy the file containing your program to a new
  35 name.  Resume GDB and use the <code>exec-file</code> command to specify
  36 that GDB should run your program under that name.
  37 Then start your program again.
  38
  39      <li>Relink your program so that the text segment is nonsharable, using the
  40 linker option <code>-N</code>.  The operating system limitation may not apply
  41 to nonsharable executables.
  42         </ol>
  43
  44    <p>A similar message can be printed if you request too many active
  45 hardware-assisted breakpoints and watchpoints:
  46
  47 <pre class="smallexample">     Stopped; cannot insert breakpoints.
  48      You may have requested too many hardware breakpoints and watchpoints.
  49      </pre>
  50
  51 <p>This message is printed when you attempt to resume the program, since
  52 only then GDB knows exactly how many hardware breakpoints and
  53 watchpoints it needs to insert.
  54
  55    <p>When this message is printed, you need to disable or remove some of the
  56 hardware-assisted breakpoints and watchpoints, and then continue.
  57
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