TRACE(...., debugstr_w(uninitialised data))?

Joerg-Cyril.Hoehle at Joerg-Cyril.Hoehle at
Fri May 21 07:56:03 CDT 2010


winmm/mci.c contains some code like this:
TRACE("=> 1/ %x (%s)\n", dwRet, debugstr_w(lpstrRet));

However, in case of error, the lpstrRet buffer is likely not initialised.
This could cause
 1. debugstr_w to choke on bad/unconvertible data (not even 0-terminated);
 2. Valgrind errors (I don't know whether the Valgrind warnings I observe
    are due to this line of code).

Am I worrying too much or should any such piece of code be protected by
TRACE("=> 1/ %x (%s)\n", dwRet, LOWORD(dwRet) ? "" : debugstr_w(lpstrRet));
(actually, an even more convoluted test is needed because of MCI_INTEGER_RETURNED)

Or is it not worth careing about because it's within TRACE() only?

I assume that debugstr_w is not executed when that channel is not traced. Correct?

 Jörg Höhle

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