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comparison src/share/vm/code/nmethod.cpp @ 2195:bf8517f4e4d0

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6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread" Summary: Defer posting events from the compiler thread: use service thread Reviewed-by: coleenp, dholmes, never, dcubed
author kamg
date Wed, 02 Feb 2011 14:38:01 -0500
parents 3582bf76420e
children 0cd39a385a72 1b4e6a5d98e0
comparison
equal deleted inserted replaced
2194:face83fc8882 2195:bf8517f4e4d0
32 #include "compiler/compilerOracle.hpp" 32 #include "compiler/compilerOracle.hpp"
33 #include "compiler/disassembler.hpp" 33 #include "compiler/disassembler.hpp"
34 #include "interpreter/bytecode.hpp" 34 #include "interpreter/bytecode.hpp"
35 #include "oops/methodDataOop.hpp" 35 #include "oops/methodDataOop.hpp"
36 #include "prims/jvmtiRedefineClassesTrace.hpp" 36 #include "prims/jvmtiRedefineClassesTrace.hpp"
37 #include "prims/jvmtiImpl.hpp"
37 #include "runtime/sharedRuntime.hpp" 38 #include "runtime/sharedRuntime.hpp"
38 #include "runtime/sweeper.hpp" 39 #include "runtime/sweeper.hpp"
39 #include "utilities/dtrace.hpp" 40 #include "utilities/dtrace.hpp"
40 #include "utilities/events.hpp" 41 #include "utilities/events.hpp"
41 #include "utilities/xmlstream.hpp" 42 #include "utilities/xmlstream.hpp"
1531 JvmtiExport::should_post_compiled_method_unload()) { 1532 JvmtiExport::should_post_compiled_method_unload()) {
1532 get_and_cache_jmethod_id(); 1533 get_and_cache_jmethod_id();
1533 } 1534 }
1534 1535
1535 if (JvmtiExport::should_post_compiled_method_load()) { 1536 if (JvmtiExport::should_post_compiled_method_load()) {
1536 JvmtiExport::post_compiled_method_load(this); 1537 // Let the Service thread (which is a real Java thread) post the event
1538 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1539 JvmtiDeferredEventQueue::enqueue(
1540 JvmtiDeferredEvent::compiled_method_load_event(this));
1537 } 1541 }
1538 } 1542 }
1539 1543
1540 jmethodID nmethod::get_and_cache_jmethod_id() { 1544 jmethodID nmethod::get_and_cache_jmethod_id() {
1541 if (_jmethod_id == NULL) { 1545 if (_jmethod_id == NULL) {
1564 // that the jmethodID is a weak reference to the methodOop so if 1568 // that the jmethodID is a weak reference to the methodOop so if
1565 // it's being unloaded there's no way to look it up since the weak 1569 // it's being unloaded there's no way to look it up since the weak
1566 // ref will have been cleared. 1570 // ref will have been cleared.
1567 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { 1571 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) {
1568 assert(!unload_reported(), "already unloaded"); 1572 assert(!unload_reported(), "already unloaded");
1569 HandleMark hm; 1573 JvmtiDeferredEvent event =
1570 JvmtiExport::post_compiled_method_unload(_jmethod_id, insts_begin()); 1574 JvmtiDeferredEvent::compiled_method_unload_event(
1575 _jmethod_id, insts_begin());
1576 if (SafepointSynchronize::is_at_safepoint()) {
1577 // Don't want to take the queueing lock. Add it as pending and
1578 // it will get enqueued later.
1579 JvmtiDeferredEventQueue::add_pending_event(event);
1580 } else {
1581 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1582 JvmtiDeferredEventQueue::enqueue(event);
1583 }
1571 } 1584 }
1572 1585
1573 // The JVMTI CompiledMethodUnload event can be enabled or disabled at 1586 // The JVMTI CompiledMethodUnload event can be enabled or disabled at
1574 // any time. As the nmethod is being unloaded now we mark it has 1587 // any time. As the nmethod is being unloaded now we mark it has
1575 // having the unload event reported - this will ensure that we don't 1588 // having the unload event reported - this will ensure that we don't