/*
* Copyright ( C ) 2016 The Android Open Source Project
*
* Licensed under the Apache License , Version 2 . 0 ( the " License " ) ;
* you may not use this file except in compliance with the License .
* You may obtain a copy of the License at
*
* http : //www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing , software
* distributed under the License is distributed on an " AS IS " BASIS ,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND , either express or implied .
* See the License for the specific language governing permissions and
* limitations under the License .
*/
#include "base/time_utils.h"
#include "jni.h"
#include "runtime.h"
#include "thread_list.h"
namespace art {
extern "C" JNIEXPORT void JNICALL Java_Main_suspendAndResume(JNIEnv*, jclass) {
static constexpr size_t kInitialSleepUS = 100 * 1000 ; // 100ms.
usleep(kInitialSleepUS); // Leave some time for threads to get in here before we start suspending.
enum Operation {
kOPSuspendAll,
kOPDumpStack,
kOPSuspendAllDumpStack,
// Total number of operations.
kOPNumber,
};
const uint64_t start_time = NanoTime();
size_t iterations = 0 ;
// Run for a fixed period of 10 seconds.
while (NanoTime() - start_time < MsToNs(10 * 1000 )) {
switch (static_cast <Operation>(iterations % kOPNumber)) {
case kOPSuspendAll: {
ScopedSuspendAll ssa(__FUNCTION__);
usleep(500 );
break ;
}
case kOPDumpStack: {
Runtime::Current()->GetThreadList()->Dump(LOG_STREAM(INFO));
usleep(500 );
break ;
}
case kOPSuspendAllDumpStack: {
// Not yet supported.
if ((false )) {
ScopedSuspendAll ssa(__FUNCTION__);
Runtime::Current()->GetThreadList()->Dump(LOG_STREAM(INFO));
}
break ;
}
case kOPNumber:
break ;
}
++iterations;
}
LOG(INFO) << "Did " << iterations << " iterations" ;
}
} // namespace art
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(vorverarbeitet am 2026-06-29)
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