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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team 2006-2009
*
* Debug and performance tracing
*
* ---------------------------------------------------------------------------*/
#ifdef DEBUG
// external headers
#include "Rts.h"
#include "rts/Flags.h"
// internal headers
#include "Trace.h"
#include "GetTime.h"
#include "Stats.h"
/*
Features we want:
- multiple log message classes
- outpout thread ID & time on each message
- thread-safe
- trace source locations?
- break into the debugger?
*/
StgWord32 classes_enabled; // not static due to inline funcs
#ifdef THREADED_RTS
static Mutex trace_utx;
#endif
#define DEBUG_FLAG(name, class) \
if (RtsFlags.DebugFlags.name) classes_enabled |= class;
void initTracing (void)
{
#ifdef THREADED_RTS
initMutex(&trace_utx);
#endif
DEBUG_FLAG(scheduler, DEBUG_sched);
DEBUG_FLAG(interpreter, DEBUG_interp);
DEBUG_FLAG(weak, DEBUG_weak);
DEBUG_FLAG(gccafs, DEBUG_gccafs);
DEBUG_FLAG(gc, DEBUG_gc);
DEBUG_FLAG(block_alloc, DEBUG_block_alloc);
DEBUG_FLAG(sanity, DEBUG_sanity);
DEBUG_FLAG(stable, DEBUG_stable);
DEBUG_FLAG(stm, DEBUG_stm);
DEBUG_FLAG(prof, DEBUG_prof);
DEBUG_FLAG(eventlog, DEBUG_eventlog);
DEBUG_FLAG(linker, DEBUG_linker);
DEBUG_FLAG(squeeze, DEBUG_squeeze);
DEBUG_FLAG(hpc, DEBUG_hpc);
}
static void tracePreface (void)
{
#ifdef THREADED_RTS
debugBelch("%12lx: ", (unsigned long)osThreadId());
#endif
if (RtsFlags.DebugFlags.timestamp) {
debugBelch("%9" FMT_Word64 ": ", stat_getElapsedTime());
}
}
void trace (StgWord32 class, const char *str, ...)
{
va_list ap;
va_start(ap,str);
ACQUIRE_LOCK(&trace_utx);
if ((classes_enabled & class) != 0) {
tracePreface();
vdebugBelch(str,ap);
debugBelch("\n");
}
RELEASE_LOCK(&trace_utx);
va_end(ap);
}
void traceBegin (const char *str, ...)
{
va_list ap;
va_start(ap,str);
ACQUIRE_LOCK(&trace_utx);
tracePreface();
vdebugBelch(str,ap);
}
void traceEnd (void)
{
debugBelch("\n");
RELEASE_LOCK(&trace_utx);
}
#endif
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