Hi,
On Thu, 2009-04-30 at 15:12 +0200, Marcus Lindblom wrote:
> Hi,
>
> After re-loading a scene, we get a std::bad_alloc (with 3 gigs) from the
> following place (line 601 in OSGShaderProgram.cpp):
>
> if(iStatus == 0)
> {
> Char8 *szDebug;
> GLint iDebugLength;
>
> osgGlGetShaderiv( uiShader,
> GL_INFO_LOG_LENGTH,
> &iDebugLength);
>
> szDebug = new Char8[iDebugLength];
> ^^^^^^^^
>
> Looking at the values in a debugger, iDebugLength is stupidly large
> (1768036544) so I think the glgetshaderiv fails and never writes to this
> value. (Is it guaranteed to do that always?)
>
hmm that is strange, the function should either return a useful value or
0 if not log is available. I admit that we don't check the length 0 case
but as this is the compilation failed path I would expect the log buffer
to contain something. The only thing I could think of is that there is
an OpenGL error. You could add a gl error check after/before the
osgGlGetShaderiv call to see if this is happening. AFAIK this could only
happen if uiShader is not a valid OpenGL shader object or shaders are
not supported at all.
In general initializing szDebug and iDebugLength is always a good idea,
don't know why I missing those. I will change that.
kind regards,
gerrit
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