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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team 2006-2009
*
* Debug and performance tracing
*
* ---------------------------------------------------------------------------*/
// external headers
#include "Rts.h"
#ifdef TRACING
// internal headers
#include "Trace.h"
#include "GetTime.h"
#include "Stats.h"
#include "eventlog/EventLog.h"
#include "Threads.h"
#include "Printer.h"
StgWord32 classes_enabled; // not static due to inline funcs
#ifdef THREADED_RTS
static Mutex trace_utx;
#endif
/* ---------------------------------------------------------------------------
Starting up / shuttting down the tracing facilities
--------------------------------------------------------------------------- */
void initTracing (void)
{
#ifdef THREADED_RTS
initMutex(&trace_utx);
#endif
#ifdef DEBUG
#define DEBUG_FLAG(name, class) \
if (RtsFlags.DebugFlags.name) classes_enabled |= class;
DEBUG_FLAG(scheduler, DEBUG_sched);
DEBUG_FLAG(scheduler, TRACE_sched); // -Ds enabled all sched events
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(linker, DEBUG_linker);
DEBUG_FLAG(squeeze, DEBUG_squeeze);
DEBUG_FLAG(hpc, DEBUG_hpc);
DEBUG_FLAG(sparks, DEBUG_sparks);
#endif
#define TRACE_FLAG(name, class) \
if (RtsFlags.TraceFlags.name) classes_enabled |= class;
TRACE_FLAG(scheduler, TRACE_sched);
initEventLogging();
}
void endTracing (void)
{
endEventLogging();
}
void freeTracing (void)
{
freeEventLogging();
}
/* ---------------------------------------------------------------------------
Emitting trace messages/events
--------------------------------------------------------------------------- */
#ifdef DEBUG
static void tracePreface (void)
{
#ifdef THREADED_RTS
debugBelch("%12lx: ", (unsigned long)osThreadId());
#endif
if (RtsFlags.TraceFlags.timestamp) {
debugBelch("%9" FMT_Word64 ": ", stat_getElapsedTime());
}
}
#endif
#ifdef DEBUG
static char *thread_stop_reasons[] = {
[HeapOverflow] = "heap overflow",
[StackOverflow] = "stack overflow",
[ThreadYielding] = "yielding",
[ThreadBlocked] = "blocked",
[ThreadFinished] = "finished",
[THREAD_SUSPENDED_FOREIGN_CALL] = "suspended while making a foreign call"
};
#endif
#ifdef DEBUG
static void traceSchedEvent_stderr (Capability *cap, EventTypeNum tag,
StgTSO *tso,
StgWord64 other STG_UNUSED)
{
ACQUIRE_LOCK(&trace_utx);
tracePreface();
switch (tag) {
case EVENT_CREATE_THREAD: // (cap, thread)
debugBelch("cap %d: created thread %ld\n", cap->no, tso->id);
break;
case EVENT_RUN_THREAD: // (cap, thread)
debugBelch("cap %d: running thread %ld (%s)\n", cap->no,
tso->id, what_next_strs[tso->what_next]);
break;
case EVENT_THREAD_RUNNABLE: // (cap, thread)
debugBelch("cap %d: thread %ld appended to run queue\n",
cap->no, tso->id);
break;
case EVENT_RUN_SPARK: // (cap, thread)
debugBelch("cap %d: thread %ld running a spark\n",
cap->no, tso->id);
break;
case EVENT_CREATE_SPARK_THREAD: // (cap, spark_thread)
debugBelch("cap %d: creating spark thread %ld\n",
cap->no, (long)other);
break;
case EVENT_MIGRATE_THREAD: // (cap, thread, new_cap)
debugBelch("cap %d: thread %ld migrating to cap %d\n",
cap->no, tso->id, (int)other);
break;
case EVENT_STEAL_SPARK: // (cap, thread, victim_cap)
debugBelch("cap %d: thread %ld stealing a spark from cap %d\n",
cap->no, tso->id, (int)other);
break;
case EVENT_THREAD_WAKEUP: // (cap, thread, other_cap)
debugBelch("cap %d: waking up thread %ld on cap %d\n",
cap->no, tso->id, (int)other);
break;
case EVENT_STOP_THREAD: // (cap, thread, status)
debugBelch("cap %d: thread %ld stopped (%s)\n",
cap->no, tso->id, thread_stop_reasons[other]);
break;
case EVENT_SHUTDOWN: // (cap)
debugBelch("cap %d: shutting down\n", cap->no);
break;
case EVENT_REQUEST_SEQ_GC: // (cap)
debugBelch("cap %d: requesting sequential GC\n", cap->no);
break;
case EVENT_REQUEST_PAR_GC: // (cap)
debugBelch("cap %d: requesting parallel GC\n", cap->no);
break;
case EVENT_GC_START: // (cap)
debugBelch("cap %d: starting GC\n", cap->no);
break;
case EVENT_GC_END: // (cap)
debugBelch("cap %d: finished GC\n", cap->no);
break;
default:
debugBelch("cap %2d: thread %ld: event %d\n\n", cap->no, tso->id, tag);
break;
}
RELEASE_LOCK(&trace_utx);
}
#endif
void traceSchedEvent_ (Capability *cap, EventTypeNum tag,
StgTSO *tso, StgWord64 other)
{
#ifdef DEBUG
if (RtsFlags.TraceFlags.trace_stderr) {
traceSchedEvent_stderr(cap, tag, tso, other);
} else
#endif
{
postSchedEvent(cap,tag,tso ? tso->id : 0,other);
}
}
#ifdef DEBUG
static void traceCap_stderr(Capability *cap, char *msg, va_list ap)
{
ACQUIRE_LOCK(&trace_utx);
tracePreface();
debugBelch("cap %2d: ", cap->no);
vdebugBelch(msg,ap);
debugBelch("\n");
RELEASE_LOCK(&trace_utx);
}
#endif
void traceCap_(Capability *cap, char *msg, va_list ap)
{
#ifdef DEBUG
if (RtsFlags.TraceFlags.trace_stderr) {
traceCap_stderr(cap, msg, ap);
} else
#endif
{
postCapMsg(cap, msg, ap);
}
}
#ifdef DEBUG
static void trace_stderr(char *msg, va_list ap)
{
ACQUIRE_LOCK(&trace_utx);
tracePreface();
vdebugBelch(msg,ap);
debugBelch("\n");
RELEASE_LOCK(&trace_utx);
}
#endif
void trace_(char *msg, va_list ap)
{
#ifdef DEBUG
if (RtsFlags.TraceFlags.trace_stderr) {
trace_stderr(msg, ap);
} else
#endif
{
postMsg(msg, ap);
}
}
void traceThreadStatus_ (StgTSO *tso USED_IF_DEBUG)
{
#ifdef DEBUG
if (RtsFlags.TraceFlags.trace_stderr) {
printThreadStatus(tso);
} else
#endif
{
/* nothing - no event for this one yet */
}
}
#ifdef DEBUG
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 /* DEBUG */
#endif /* TRACING */
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