8006005: Fix constant pool index validation and alignment trap for method parameter reflection
Summary: This patch addresses an alignment trap due to the storage format of method parameters data in constMethod. It also adds code to validate constant pool indexes for method parameters data.
Reviewed-by: jrose, dholmes
Contributed-by: eric.mccorkle@oracle.com
/*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "precompiled.hpp"
#include "classfile/classLoader.hpp"
#include "services/attachListener.hpp"
#include "services/management.hpp"
#include "services/runtimeService.hpp"
#include "utilities/dtrace.hpp"
#include "utilities/exceptions.hpp"
#ifndef USDT2
HS_DTRACE_PROBE_DECL(hs_private, safepoint__begin);
HS_DTRACE_PROBE_DECL(hs_private, safepoint__end);
#endif /* !USDT2 */
#if INCLUDE_MANAGEMENT
TimeStamp RuntimeService::_app_timer;
TimeStamp RuntimeService::_safepoint_timer;
PerfCounter* RuntimeService::_sync_time_ticks = NULL;
PerfCounter* RuntimeService::_total_safepoints = NULL;
PerfCounter* RuntimeService::_safepoint_time_ticks = NULL;
PerfCounter* RuntimeService::_application_time_ticks = NULL;
PerfCounter* RuntimeService::_thread_interrupt_signaled_count = NULL;
PerfCounter* RuntimeService::_interrupted_before_count = NULL;
PerfCounter* RuntimeService::_interrupted_during_count = NULL;
void RuntimeService::init() {
// Make sure the VM version is initialized
Abstract_VM_Version::initialize();
if (UsePerfData) {
EXCEPTION_MARK;
_sync_time_ticks =
PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",
PerfData::U_Ticks, CHECK);
_total_safepoints =
PerfDataManager::create_counter(SUN_RT, "safepoints",
PerfData::U_Events, CHECK);
_safepoint_time_ticks =
PerfDataManager::create_counter(SUN_RT, "safepointTime",
PerfData::U_Ticks, CHECK);
_application_time_ticks =
PerfDataManager::create_counter(SUN_RT, "applicationTime",
PerfData::U_Ticks, CHECK);
// create performance counters for jvm_version and its capabilities
PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,
(jlong) Abstract_VM_Version::jvm_version(), CHECK);
// I/O interruption related counters
// thread signaling via os::interrupt()
_thread_interrupt_signaled_count =
PerfDataManager::create_counter(SUN_RT,
"threadInterruptSignaled", PerfData::U_Events, CHECK);
// OS_INTRPT via "check before" in _INTERRUPTIBLE
_interrupted_before_count =
PerfDataManager::create_counter(SUN_RT, "interruptedBeforeIO",
PerfData::U_Events, CHECK);
// OS_INTRPT via "check during" in _INTERRUPTIBLE
_interrupted_during_count =
PerfDataManager::create_counter(SUN_RT, "interruptedDuringIO",
PerfData::U_Events, CHECK);
// The capabilities counter is a binary representation of the VM capabilities in string.
// This string respresentation simplifies the implementation of the client side
// to parse the value.
char capabilities[65];
size_t len = sizeof(capabilities);
memset((void*) capabilities, '0', len);
capabilities[len-1] = '\0';
capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';
#if INCLUDE_SERVICES
capabilities[1] = '1';
#endif // INCLUDE_SERVICES
PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",
capabilities, CHECK);
}
}
void RuntimeService::record_safepoint_begin() {
#ifndef USDT2
HS_DTRACE_PROBE(hs_private, safepoint__begin);
#else /* USDT2 */
HS_PRIVATE_SAFEPOINT_BEGIN();
#endif /* USDT2 */
// Print the time interval in which the app was executing
if (PrintGCApplicationConcurrentTime) {
gclog_or_tty->print_cr("Application time: %3.7f seconds",
last_application_time_sec());
}
// update the time stamp to begin recording safepoint time
_safepoint_timer.update();
if (UsePerfData) {
_total_safepoints->inc();
if (_app_timer.is_updated()) {
_application_time_ticks->inc(_app_timer.ticks_since_update());
}
}
}
void RuntimeService::record_safepoint_synchronized() {
if (UsePerfData) {
_sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
}
}
void RuntimeService::record_safepoint_end() {
#ifndef USDT2
HS_DTRACE_PROBE(hs_private, safepoint__end);
#else /* USDT2 */
HS_PRIVATE_SAFEPOINT_END();
#endif /* USDT2 */
// Print the time interval for which the app was stopped
// during the current safepoint operation.
if (PrintGCApplicationStoppedTime) {
gclog_or_tty->print_cr("Total time for which application threads "
"were stopped: %3.7f seconds",
last_safepoint_time_sec());
}
// update the time stamp to begin recording app time
_app_timer.update();
if (UsePerfData) {
_safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());
}
}
void RuntimeService::record_application_start() {
// update the time stamp to begin recording app time
_app_timer.update();
}
// Don't need to record application end because we currently
// exit at a safepoint and record_safepoint_begin() handles updating
// the application time counter at VM exit.
jlong RuntimeService::safepoint_sync_time_ms() {
return UsePerfData ?
Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
}
jlong RuntimeService::safepoint_count() {
return UsePerfData ?
_total_safepoints->get_value() : -1;
}
jlong RuntimeService::safepoint_time_ms() {
return UsePerfData ?
Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
}
jlong RuntimeService::application_time_ms() {
return UsePerfData ?
Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
}
void RuntimeService::record_interrupted_before_count() {
if (UsePerfData) {
_interrupted_before_count->inc();
}
}
void RuntimeService::record_interrupted_during_count() {
if (UsePerfData) {
_interrupted_during_count->inc();
}
}
void RuntimeService::record_thread_interrupt_signaled_count() {
if (UsePerfData) {
_thread_interrupt_signaled_count->inc();
}
}
#endif // INCLUDE_MANAGEMENT