Hello, I am trying to debug Apple version of pcsc-lite. The code contains calls like: secdebug("pcscd", "RFCheckSharing: sharing violation, dwLockId: 0x%02X", rContext->dwLockId); I would like to know _where_ the debug messages are sent? And how to activate them (if needed)? What I found for now:

From /usr/local/SecurityPieces/Frameworks/security_utilities.framework/Headers/debugging.h // // The debug-log macro is now unconditionally emitted as a DTrace static probe p oint. // #define secdebug(scope, format...) \ if (__builtin_expect(SECURITY_DEBUG_LOG_ENABLED(), 0)) { \ char __msg[500]; snprintf(__msg, sizeof(__msg), ## format); \ volatile char c __attribute__((unused)) = scope[0]; \ SECURITY_DEBUG_LOG((char *)(scope), (__msg)); \ } else /* nothing */ #define secdebugf(scope, __msg) SECURITY_DEBUG_LOG((char *)(scope), (__msg))

From /usr/local/SecurityPieces/Frameworks/security_utilities.framework/Headers/utilities_dtrace.h #define SECURITY_DEBUG_LOG(arg0, arg1) \do { \ __asm__ volatile(".reference " SECURITY_DEBUG_TYPEDEFS); \ __dtrace_probe$security_debug$log$v1$63686172202a$63686172202a(arg0, arg 1); \ __asm__ volatile(".reference " SECURITY_DEBUG_STABILITY); \ } while (0)

#define SECURITY_DEBUG_LOG_ENABLED() \ __dtrace_isenabled$security_debug$log$v1() It looks like it is related to DTrace. And I am a very beginner at DTrace. So any help is welcome. Thanks -- Dr. Ludovic Rousseau