BUG: CodeView Breakpoints with Nested Quotes Unrecognized

ID: Q86828

The information in this article applies to:

Microsoft CodeView for MS-DOS, versions 4.0, 4.01, 4.05, 4.1
Microsoft CodeView for Windows, versions 4.0, 4.01, 4.1
Microsoft CodeView for Win32s, version 4.25

SYMPTOMS

In Microsoft CodeView, command window commands involving nested quotes are not recognized correctly. A breakpoint that includes nested quotation marks generates the following error:

CV1001 Error: Invalid Breakpoint Command

For example, the following command should create a breakpoint that executes the function func_name when line 12 is reached:


   bp.12,, "?func_name("string")"

Instead, this command generates a CV1001 error.

It is possible to enter this type of illegal breakpoint through the breakpoint dialog box. This causes an error message when the CURRENT.STS is read the next time CodeView is invoked.

CAUSE

CodeView incorrectly parses nested quotation marks both from the command line and from the [debug-] section of the CURRENT.STS file where breakpoints are saved between debugging sessions. This is a limitation of CodeView's command syntax.

RESOLUTION

If you need to set this type of breakpoint, use this workaround. Add a global character array, initialized to the string you want to call the function with, to the program. For example:

char param[] = "string";

After recompiling the program, set the breakpoint using the variable as the parameter instead of a literal string, as follows:

bp.12,, "?func_name(param)"

This avoids the nested quotations and results in a breakpoint that can be saved between debugging sessions.

STATUS

Microsoft has confirmed this to be a problem in CodeView versions 3.0, 3.05, 3.06, 3.07, 3.11, 3.12, 3.14, 3.5, 4.0, 4.01, 4.05, 4.1 and 4.25. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: 3.00 3.50 4.00 4.10

Keywords : kberrmsg kb16bitonly kbCodeView kbDebug kbVC
Version : :4.0,4.01,4.05,4.1,4.25
Platform : MS-DOS WINDOWS
Issue type :