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8212160: JVMTI agent crashes with "assert(_value != 0LL) failed: resolving NULL _value"

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Add local deferred event list to thread to post events outside CodeCache_lock.

Reviewed-by: eosterlund, dholmes, sspitsyn
This commit is contained in:
Coleen Phillimore 2019-12-05 16:57:17 -05:00
parent 730d0ecf19
commit 8846a8043d
15 changed files with 297 additions and 90 deletions
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7
src/hotspot/share/prims/jvmtiExport.cpp
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@ -59,6 +59,7 @@
#include "runtime/objectMonitor.inline.hpp"
#include "runtime/os.inline.hpp"
#include "runtime/safepointVerifiers.hpp"
#include "runtime/serviceThread.hpp"
#include "runtime/thread.inline.hpp"
#include "runtime/threadSMR.hpp"
#include "runtime/vframe.inline.hpp"
@ -1352,11 +1353,10 @@ void JvmtiExport::post_class_unload(Klass* klass) {
// postings to the service thread so that it can perform them in a safe
// context and in-order.
MutexLocker ml(Service_lock, Mutex::_no_safepoint_check_flag);
ResourceMark rm;
// JvmtiDeferredEvent copies the string.
JvmtiDeferredEvent event = JvmtiDeferredEvent::class_unload_event(klass->name()->as_C_string());
JvmtiDeferredEventQueue::enqueue(event);
ServiceThread::enqueue_deferred_event(&event);
}
@ -2235,10 +2235,9 @@ void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code
// It may not be safe to post the event from this thread. Defer all
// postings to the service thread so that it can perform them in a safe
// context and in-order.
MutexLocker ml(Service_lock, Mutex::_no_safepoint_check_flag);
JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
name, code_begin, code_end);
JvmtiDeferredEventQueue::enqueue(event);
ServiceThread::enqueue_deferred_event(&event);
}
}