/*
* Class: gnu/java/lang/management/VMMemoryMXBeanImpl
* Method: getHeapMemoryUsage
* Signature: ()Ljava/lang/management/MemoryUsage;
*/
JNIEXPORT java_lang_management_MemoryUsage* JNICALL Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getHeapMemoryUsage(JNIEnv *env, jclass clazz)
{
classinfo *class_java_lang_management_MemoryUsage;
java_objectheader *o;
java_lang_management_MemoryUsage *mu;
methodinfo *m;
s8 init;
s8 used;
s8 commited;
s8 maximum;
/* get the class */
/* XXX optimize me! sometime... */
if (!(class_java_lang_management_MemoryUsage = load_class_bootstrap(utf_new_char("java/lang/management/MemoryUsage"))))
return false;
/* create the object */
o = builtin_new(class_java_lang_management_MemoryUsage);
if (o == NULL)
return NULL;
/* cast the object to a MemoryUsage object (for debugability) */
mu = (java_lang_management_MemoryUsage *) o;
/* find initializer */
m = class_findmethod(class_java_lang_management_MemoryUsage,
utf_init, utf_new_char("(JJJJ)V"));
/* initializer not found */
if (m == NULL)
return NULL;
/* get values from the VM */
/* XXX if we ever support more than one VM, change this */
init = opt_heapstartsize;
used = gc_get_total_bytes();
commited = gc_get_heap_size();
maximum = gc_get_max_heap_size();
/* call initializer */
(void) vm_call_method(m, o, init, used, commited, maximum);
return mu;
}
void statistics_print_gc_memory_usage(void)
{
static int64_t count = 0;
int64_t max;
int64_t size;
int64_t free;
int64_t used;
int64_t total;
count++;
max = gc_get_max_heap_size();
size = gc_get_heap_size();
free = gc_get_free_bytes();
used = size - free;
total = gc_get_total_bytes();
if (opt_ProfileMemoryUsageGNUPlot) {
if (count == 1)
fprintf(opt_ProfileMemoryUsageGNUPlot, "plot \"profile.dat\" using 1:2 with lines title \"max. Java heap size\", \"profile.dat\" using 1:3 with lines title \"Java heap size\", \"profile.dat\" using 1:4 with lines title \"used\", \"profile.dat\" using 1:5 with lines title \"free\"\n");
fprintf(opt_ProfileMemoryUsageGNUPlot,
"%" PRId64 " %" PRId64 " %" PRId64 " %" PRId64 " %" PRId64 "\n",
count, max, size, used, free);
fflush(opt_ProfileMemoryUsageGNUPlot);
}
else {
log_println("GC memory usage -------------------");
log_println("");
log_println("max. Java heap size: %10lld", max);
log_println("");
log_println("Java heap size: %10lld", size);
log_println("used: %10lld", used);
log_println("free: %10lld", free);
log_println("totally used: %10lld", total);
log_println("");
}
}