/* signal handler */
static void sampler_sample(int sig)
{
ScmVM *vm = Scm_VM();
if (vm->prof == NULL) return;
if (vm->prof->state != SCM_PROFILER_RUNNING) return;
if (vm->prof->currentSample >= SCM_PROF_SAMPLES_IN_BUFFER) {
ITIMER_STOP();
sampler_flush(vm);
ITIMER_START();
}
int i = vm->prof->currentSample++;
if (vm->base) {
/* If vm->pc is RET and val0 is a subr, it is pretty likely that
we're actually executing that subr. */
if (vm->pc && SCM_VM_INSN_CODE(*vm->pc) == SCM_VM_RET
&& SCM_SUBRP(vm->val0)) {
vm->prof->samples[i].func = vm->val0;
vm->prof->samples[i].pc = NULL;
} else {
vm->prof->samples[i].func = SCM_OBJ(vm->base);
vm->prof->samples[i].pc = vm->pc;
}
} else {
vm->prof->samples[i].func = SCM_FALSE;
vm->prof->samples[i].pc = NULL;
}
vm->prof->totalSamples++;
}
/*=============================================================
* External API
*/
void Scm_ProfilerStart(void)
{
ScmVM *vm = Scm_VM();
ScmObj templat = Scm_StringAppendC(SCM_STRING(Scm_TmpDir()),
"/gauche-profXXXXXX", -1, -1);
char *templat_buf = Scm_GetString(SCM_STRING(templat)); /*mutable copy*/
if (!vm->prof) {
vm->prof = SCM_NEW(ScmVMProfiler);
vm->prof->state = SCM_PROFILER_INACTIVE;
vm->prof->samplerFd = Scm_Mkstemp(templat_buf);
vm->prof->currentSample = 0;
vm->prof->totalSamples = 0;
vm->prof->errorOccurred = 0;
vm->prof->currentCount = 0;
vm->prof->statHash =
SCM_HASH_TABLE(Scm_MakeHashTableSimple(SCM_HASH_EQ, 0));
#if defined(GAUCHE_WINDOWS)
vm->prof->hTargetThread = NULL;
vm->prof->hObserverThread = NULL;
vm->prof->hTimerEvent = NULL;
vm->prof->samplerFileName = templat_buf;
#else /* !GAUCHE_WINDOWS */
unlink(templat_buf); /* keep anonymous tmpfile */
#endif /* !GAUCHE_WINDOWS */
} else if (vm->prof->samplerFd < 0) {
vm->prof->samplerFd = Scm_Mkstemp(templat_buf);
#if defined(GAUCHE_WINDOWS)
vm->prof->samplerFileName = templat_buf;
#else /* !GAUCHE_WINDOWS */
unlink(templat_buf);
#endif /* !GAUCHE_WINDOWS */
}
if (vm->prof->state == SCM_PROFILER_RUNNING) return;
vm->prof->state = SCM_PROFILER_RUNNING;
vm->profilerRunning = TRUE;
/* NB: this should be done globally!!! */
#if defined(GAUCHE_WINDOWS)
if (!DuplicateHandle(GetCurrentProcess(),
GetCurrentThread(),
GetCurrentProcess(),
&vm->prof->hTargetThread,
0, FALSE, DUPLICATE_SAME_ACCESS)) {
vm->prof->hTargetThread = NULL;
Scm_SysError("DuplicateHandle failed");
}
#else /* !GAUCHE_WINDOWS */
struct sigaction act;
act.sa_handler = sampler_sample;
sigfillset(&act.sa_mask);
act.sa_flags = SA_RESTART;
if (sigaction(SIGPROF, &act, NULL) < 0) {
Scm_SysError("sigaction failed");
}
#endif /* !GAUCHE_WINDOWS */
ITIMER_START();
}
/*=============================================================
* External API
*/
void Scm_ProfilerStart(void)
{
ScmVM *vm = Scm_VM();
ScmObj templat = Scm_StringAppendC(SCM_STRING(Scm_TmpDir()),
"/gauche-profXXXXXX", -1, -1);
char *templat_buf = Scm_GetString(SCM_STRING(templat)); /*mutable copy*/
if (!vm->prof) {
vm->prof = SCM_NEW(ScmVMProfiler);
vm->prof->state = SCM_PROFILER_INACTIVE;
vm->prof->samplerFd = Scm_Mkstemp(templat_buf);
vm->prof->currentSample = 0;
vm->prof->totalSamples = 0;
vm->prof->errorOccurred = 0;
vm->prof->currentCount = 0;
vm->prof->statHash =
SCM_HASH_TABLE(Scm_MakeHashTableSimple(SCM_HASH_EQ, 0));
unlink(templat_buf); /* keep anonymous tmpfile */
} else if (vm->prof->samplerFd < 0) {
vm->prof->samplerFd = Scm_Mkstemp(templat_buf);
unlink(templat_buf);
}
if (vm->prof->state == SCM_PROFILER_RUNNING) return;
vm->prof->state = SCM_PROFILER_RUNNING;
vm->profilerRunning = TRUE;
/* NB: this should be done globally!!! */
struct sigaction act;
act.sa_handler = sampler_sample;
sigfillset(&act.sa_mask);
act.sa_flags = SA_RESTART;
if (sigaction(SIGPROF, &act, NULL) < 0) {
Scm_SysError("sigaction failed");
}
ITIMER_START();
}