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8326106: Write and clear stack trace table outside of safepoint

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Reviewed-by: egahlin
This commit is contained in:
Markus Grönlund 2024-02-19 13:19:12 +00:00
parent 56c50841ee
commit a776104e21
3 changed files with 10 additions and 13 deletions
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16
src/hotspot/share/jfr/leakprofiler/checkpoint/objectSampleCheckpoint.cpp
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@ -223,9 +223,6 @@ class StackTraceBlobInstaller {
StackTraceBlobInstaller() : _cache(JfrOptionSet::old_object_queue_size()) {
prepare_for_resolution();
}
~StackTraceBlobInstaller() {
JfrStackTraceRepository::clear_leak_profiler();
}
void sample_do(ObjectSample* sample) {
if (stack_trace_precondition(sample)) {
add_to_leakp_set(sample);
@ -280,11 +277,14 @@ void ObjectSampleCheckpoint::on_rotation(const ObjectSampler* sampler) {
assert(LeakProfiler::is_running(), "invariant");
JavaThread* const thread = JavaThread::current();
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_native(thread);)
// can safepoint here
ThreadInVMfromNative transition(thread);
MutexLocker lock(ClassLoaderDataGraph_lock);
// the lock is needed to ensure the unload lists do not grow in the middle of inspection.
install_stack_traces(sampler);
{
// can safepoint here
ThreadInVMfromNative transition(thread);
MutexLocker lock(ClassLoaderDataGraph_lock);
// the lock is needed to ensure the unload lists do not grow in the middle of inspection.
install_stack_traces(sampler);
}
JfrStackTraceRepository::clear_leak_profiler();
}
static bool is_klass_unloaded(traceid klass_id) {

4
src/hotspot/share/jfr/recorder/service/jfrRecorderService.cpp
View File

@ -573,9 +573,7 @@ void JfrRecorderService::pre_safepoint_write() {
ObjectSampleCheckpoint::on_rotation(ObjectSampler::acquire());
}
write_storage(_storage, _chunkwriter);
if (_stack_trace_repository.is_modified()) {
write_stacktrace(_stack_trace_repository, _chunkwriter, false);
}
write_stacktrace(_stack_trace_repository, _chunkwriter, true);
}
void JfrRecorderService::invoke_safepoint_write() {

3
src/hotspot/share/jfr/recorder/stacktrace/jfrStackTraceRepository.cpp
View File

@ -98,11 +98,10 @@ bool JfrStackTraceRepository::is_modified() const {
}
size_t JfrStackTraceRepository::write(JfrChunkWriter& sw, bool clear) {
MutexLocker lock(JfrStacktrace_lock, Mutex::_no_safepoint_check_flag);
if (_entries == 0) {
return 0;
}
MutexLocker lock(JfrStacktrace_lock, Mutex::_no_safepoint_check_flag);
assert(_entries > 0, "invariant");
int count = 0;
for (u4 i = 0; i < TABLE_SIZE; ++i) {
JfrStackTrace* stacktrace = _table[i];