C++ (Cpp) dtrace_membar_consumer Examples

Example #1

File: fbt.c Project: aglab2/darwin-xnu

/*ARGSUSED*/
static void
fbt_suspend(void *arg, dtrace_id_t id, void *parg)
{
#pragma unused(arg,id)
	fbt_probe_t *fbt = parg;
	struct modctl *ctl = NULL;

	for (; fbt != NULL; fbt = fbt->fbtp_next) {
	    ctl = fbt->fbtp_ctl;

	    ASSERT(ctl->mod_nenabled > 0);
	    if (!ctl->mod_loaded || (ctl->mod_loadcnt != fbt->fbtp_loadcnt))
		continue;

	    (void)ml_nofault_copy( (vm_offset_t)&fbt->fbtp_savedval, (vm_offset_t)fbt->fbtp_patchpoint, 
								sizeof(fbt->fbtp_savedval));
		
		/*
		 * Make the patched instruction visible via a data + instruction
		 * cache flush for the platforms that need it
		 */
		flush_dcache((vm_offset_t)fbt->fbtp_patchpoint,(vm_size_t)sizeof(fbt->fbtp_savedval), 0);
		invalidate_icache((vm_offset_t)fbt->fbtp_patchpoint,(vm_size_t)sizeof(fbt->fbtp_savedval), 0);
		
		fbt->fbtp_currentval = fbt->fbtp_savedval;
	}
	
	dtrace_membar_consumer();
}

Example #2

File: fbt.c Project: 0xffea/xnu

/*ARGSUSED*/
static void
fbt_resume(void *arg, dtrace_id_t id, void *parg)
{
#pragma unused(arg,id)
	fbt_probe_t *fbt = parg;
	struct modctl *ctl = fbt->fbtp_ctl;

#if defined (__ppc__) || defined (__ppc64__)
	dtrace_casptr(&tempDTraceIntHook, NULL, fbt_perfIntCallback);
	if (tempDTraceIntHook != (perfCallback)fbt_perfIntCallback) {
		if (fbt_verbose) {
			cmn_err(CE_NOTE, "fbt_enable is failing for probe %s "
			    "in module %s: tempDTraceIntHook already occupied.",
			    fbt->fbtp_name, ctl->mod_modname);
		}
		return;
	}
#endif
	
	dtrace_casptr(&tempDTraceTrapHook, NULL, fbt_perfCallback);
	if (tempDTraceTrapHook != (perfCallback)fbt_perfCallback) {
		if (fbt_verbose) {
			cmn_err(CE_NOTE, "fbt_resume is failing for probe %s "
			    "in module %s: tempDTraceTrapHook already occupied.",
			    fbt->fbtp_name, ctl->mod_modname);
		}
		return;
	}
	
	for (; fbt != NULL; fbt = fbt->fbtp_next)
		(void)ml_nofault_copy( (vm_offset_t)&fbt->fbtp_patchval, (vm_offset_t)fbt->fbtp_patchpoint, 
								sizeof(fbt->fbtp_patchval));
		
	dtrace_membar_consumer();
}

Example #3

File: fbt.c Project: 0xffea/xnu

/*ARGSUSED*/
static void
fbt_suspend(void *arg, dtrace_id_t id, void *parg)
{
#pragma unused(arg,id)
	fbt_probe_t *fbt = parg;

	for (; fbt != NULL; fbt = fbt->fbtp_next)
		(void)ml_nofault_copy( (vm_offset_t)&fbt->fbtp_savedval, (vm_offset_t)fbt->fbtp_patchpoint, 
								sizeof(fbt->fbtp_savedval));
		
	dtrace_membar_consumer();
}

Example #4

File: fbt.c Project: aglab2/darwin-xnu

/*ARGSUSED*/
static void
fbt_resume(void *arg, dtrace_id_t id, void *parg)
{
#pragma unused(arg,id)
	fbt_probe_t *fbt = parg;
	struct modctl *ctl = NULL;

	for (; fbt != NULL; fbt = fbt->fbtp_next) {
	    ctl = fbt->fbtp_ctl;

	    ASSERT(ctl->mod_nenabled > 0);
	    if (!ctl->mod_loaded || (ctl->mod_loadcnt != fbt->fbtp_loadcnt))
		continue;
	
	    dtrace_casptr(&tempDTraceTrapHook, NULL, fbt_perfCallback);
	    if (tempDTraceTrapHook != (perfCallback)fbt_perfCallback) {
		if (fbt_verbose) {
			cmn_err(CE_NOTE, "fbt_resume is failing for probe %s "
			    "in module %s: tempDTraceTrapHook already occupied.",
			    fbt->fbtp_name, ctl->mod_modname);
		}
		return;
	    }
	
	    (void)ml_nofault_copy( (vm_offset_t)&fbt->fbtp_patchval, (vm_offset_t)fbt->fbtp_patchpoint, 
								sizeof(fbt->fbtp_patchval));

#if CONFIG_EMBEDDED
		/*
		 * Make the patched instruction visible via a data + instruction cache flush.
		 */
		flush_dcache((vm_offset_t)fbt->fbtp_patchpoint,(vm_size_t)sizeof(fbt->fbtp_patchval), 0);
		invalidate_icache((vm_offset_t)fbt->fbtp_patchpoint,(vm_size_t)sizeof(fbt->fbtp_patchval), 0);
#endif
		
  	    fbt->fbtp_currentval = fbt->fbtp_patchval;
	}
	
	dtrace_membar_consumer();
}

Example #5

File: fbt.c Project: aglab2/darwin-xnu

/*ARGSUSED*/
int
fbt_enable(void *arg, dtrace_id_t id, void *parg)
{
#pragma unused(arg,id)
	fbt_probe_t *fbt = parg;
	struct modctl *ctl = NULL;

    for (; fbt != NULL; fbt = fbt->fbtp_next) {

	ctl = fbt->fbtp_ctl;
	
	if (!ctl->mod_loaded) {
		if (fbt_verbose) {
			cmn_err(CE_NOTE, "fbt is failing for probe %s "
			    "(module %s unloaded)",
			    fbt->fbtp_name, ctl->mod_modname);
		}

		continue;
	}

	/*
	 * Now check that our modctl has the expected load count.  If it
	 * doesn't, this module must have been unloaded and reloaded -- and
	 * we're not going to touch it.
	 */
	if (ctl->mod_loadcnt != fbt->fbtp_loadcnt) {
		if (fbt_verbose) {
			cmn_err(CE_NOTE, "fbt is failing for probe %s "
			    "(module %s reloaded)",
			    fbt->fbtp_name, ctl->mod_modname);
		}

		continue;
	}	

	dtrace_casptr(&tempDTraceTrapHook, NULL, fbt_perfCallback);
	if (tempDTraceTrapHook != (perfCallback)fbt_perfCallback) {
		if (fbt_verbose) {
			cmn_err(CE_NOTE, "fbt_enable is failing for probe %s "
			    "in module %s: tempDTraceTrapHook already occupied.",
			    fbt->fbtp_name, ctl->mod_modname);
		}
		continue;
	}

	if (fbt->fbtp_currentval != fbt->fbtp_patchval) {
		(void)ml_nofault_copy( (vm_offset_t)&fbt->fbtp_patchval, (vm_offset_t)fbt->fbtp_patchpoint, 
								sizeof(fbt->fbtp_patchval));
		/*
		 * Make the patched instruction visible via a data + instruction
		 * cache flush for the platforms that need it
		 */
		flush_dcache((vm_offset_t)fbt->fbtp_patchpoint,(vm_size_t)sizeof(fbt->fbtp_patchval), 0);
		invalidate_icache((vm_offset_t)fbt->fbtp_patchpoint,(vm_size_t)sizeof(fbt->fbtp_patchval), 0);
                fbt->fbtp_currentval = fbt->fbtp_patchval;

		ctl->mod_nenabled++;
	}

    }
    
    dtrace_membar_consumer();
    
    return (0);
}