Problem with __asm { int 3 }
Author
I am using a modified VERIFY macro to check the HRESULT return values of DirectX calls.
The macro uses the following to break into the code:
__asm { int 3 }
However, I am getting an exception error when I run the program.
Specifically, "GAME caused an exception 03H in ..."
If I comment out the assembly call the program does not crash.
If I use the debugger to execute the program to a point in the code well past the assembly call, the program runs fine and stops (as it should) with a "User breakpoint called from code at ..." message when it reaches the inline assembly call.
Thanks
Todd
Author
Here is the source for the function called by the macro:
void ReportDirectXError(const char* title, HRESULT r, const char* file, int line, const char* str )
{
char tstr[1024];
char* fail = FAILED(r) ? "failure" : "(no failure)";
const char* hrStr = DXGetErrorString8( r );
sprintf( tstr, "*** %s %s ***\n%s\nreturn code: ''%s''\n%s (line %d)\n", title, fail, str, hrStr, file, line );
OutputDebugString( tstr );
if (FAILED(r))
{
__asm { int 3 }
}
}
void ReportDirectXError(const char* title, HRESULT r, const char* file, int line, const char* str )
{
char tstr[1024];
char* fail = FAILED(r) ? "failure" : "(no failure)";
const char* hrStr = DXGetErrorString8( r );
sprintf( tstr, "*** %s %s ***\n%s\nreturn code: ''%s''\n%s (line %d)\n", title, fail, str, hrStr, file, line );
OutputDebugString( tstr );
if (FAILED(r))
{
__asm { int 3 }
}
}
If you use int 3 you get a breakpoint, which is what you see. The debugger handles these in Debug mode but not in Release mode. So the DirectX call is failing.
Helpful links:
How To Ask Questions The Smart Way | Google can help with your question | Search MSDN for help with standard C or Windows functions
Helpful links:
How To Ask Questions The Smart Way | Google can help with your question | Search MSDN for help with standard C or Windows functions
Author
I''m still a little confused....
1) I am compiling using a ''Debug'' profile so shouldn''t the breakpoint work even if I am not specifically running it from the debugger?
2) Why would the program execute if I comment out the inline assembly call?
3) Can you explain what you mean by the DirectX call is failing?
Thanks for the all the help.
Todd
1) I am compiling using a ''Debug'' profile so shouldn''t the breakpoint work even if I am not specifically running it from the debugger?
2) Why would the program execute if I comment out the inline assembly call?
3) Can you explain what you mean by the DirectX call is failing?
Thanks for the all the help.
Todd
The breakpoint exception is only caught by the Debugger if it''s attached to your app. If you just run the program you''ll get an unhandled exception.
If you comment it out the code making the breakpoint exception no longer gets run.
For some reason the HRESULT you pass into that function is an error code. You need to check the function that produced the error, and possibly put the HRESULT into the DirectX error lookup utility (comes with the SDK) to find out what happened.
Helpful links:
How To Ask Questions The Smart Way | Google can help with your question | Search MSDN for help with standard C or Windows functions
If you comment it out the code making the breakpoint exception no longer gets run.
For some reason the HRESULT you pass into that function is an error code. You need to check the function that produced the error, and possibly put the HRESULT into the DirectX error lookup utility (comes with the SDK) to find out what happened.
Helpful links:
How To Ask Questions The Smart Way | Google can help with your question | Search MSDN for help with standard C or Windows functions
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