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8258015: [JVMCI] JVMCI_lock shouldn't be held while initializing box classes

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Reviewed-by: iveresov
This commit is contained in:
Doug Simon 2020-12-10 16:16:25 +00:00
parent b35401d6a7
commit d163c6fe2e
4 changed files with 16 additions and 15 deletions
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9
src/hotspot/share/jvmci/jvmci.cpp
View file

@ -37,7 +37,7 @@
JVMCIRuntime* JVMCI::_compiler_runtime = NULL;
JVMCIRuntime* JVMCI::_java_runtime = NULL;
volatile bool JVMCI::_is_initialized = false;
volatile bool JVMCI::_box_caches_initialized = false;
bool JVMCI::_box_caches_initialized = false;
void* JVMCI::_shared_library_handle = NULL;
char* JVMCI::_shared_library_path = NULL;
volatile bool JVMCI::_in_shutdown = false;
@ -130,12 +130,9 @@ void JVMCI::ensure_box_caches_initialized(TRAPS) {
if (_box_caches_initialized) {
return;
}
MutexLocker locker(JVMCI_lock);
// Check again after locking
if (_box_caches_initialized) {
return;
}
// While multiple threads may reach here, that's fine
// since class initialization is synchronized.
Symbol* box_classes[] = {
java_lang_Boolean::symbol(),
java_lang_Byte_ByteCache::symbol(),

4
src/hotspot/share/jvmci/jvmci.hpp
View file

@ -53,8 +53,8 @@ class JVMCI : public AllStatic {
// execution has completed successfully.
static volatile bool _is_initialized;
// used to synchronize lazy initialization of boxing cache classes.
static volatile bool _box_caches_initialized;
// True once boxing cache classes are guaranteed to be initialized.
static bool _box_caches_initialized;
// Handle created when loading the JVMCI shared library with os::dll_load.
// Must hold JVMCI_lock when initializing.

11
src/hotspot/share/jvmci/jvmciCodeInstaller.cpp
View file

@ -945,6 +945,10 @@ JVMCI::CodeInstallResult CodeInstaller::initialize_buffer(CodeBuffer& buffer, bo
}
}
#endif
if (_has_auto_box) {
JavaThread* THREAD = JavaThread::current();
JVMCI::ensure_box_caches_initialized(CHECK_(JVMCI::ok));
}
return JVMCI::ok;
}
@ -1022,7 +1026,6 @@ GrowableArray<ScopeValue*>* CodeInstaller::record_virtual_objects(JVMCIObject de
}
GrowableArray<ScopeValue*>* objects = new GrowableArray<ScopeValue*>(JVMCIENV->get_length(virtualObjects), JVMCIENV->get_length(virtualObjects), NULL);
// Create the unique ObjectValues
bool has_auto_box = false;
for (int i = 0; i < JVMCIENV->get_length(virtualObjects); i++) {
// HandleMark hm(THREAD);
JVMCIObject value = JVMCIENV->get_object_at(virtualObjects, i);
@ -1030,7 +1033,7 @@ GrowableArray<ScopeValue*>* CodeInstaller::record_virtual_objects(JVMCIObject de
JVMCIObject type = jvmci_env()->get_VirtualObject_type(value);
bool is_auto_box = jvmci_env()->get_VirtualObject_isAutoBox(value);
if (is_auto_box) {
has_auto_box = true;
_has_auto_box = true;
}
Klass* klass = jvmci_env()->asKlass(type);
oop javaMirror = klass->java_mirror();
@ -1054,10 +1057,6 @@ GrowableArray<ScopeValue*>* CodeInstaller::record_virtual_objects(JVMCIObject de
}
_debug_recorder->dump_object_pool(objects);
if (has_auto_box) {
JavaThread* THREAD = JavaThread::current();
JVMCI::ensure_box_caches_initialized(CHECK_NULL);
}
return objects;
}

7
src/hotspot/share/jvmci/jvmciCodeInstaller.hpp
View file

@ -200,6 +200,7 @@ private:
Dependencies* _dependencies;
ExceptionHandlerTable _exception_handler_table;
ImplicitExceptionTable _implicit_exception_table;
bool _has_auto_box;
bool _immutable_pic_compilation; // Installer is called for Immutable PIC compilation.
@ -230,7 +231,11 @@ private:
public:
CodeInstaller(JVMCIEnv* jvmci_env, bool immutable_pic_compilation) : _arena(mtJVMCI), _jvmci_env(jvmci_env), _immutable_pic_compilation(immutable_pic_compilation) {}
CodeInstaller(JVMCIEnv* jvmci_env, bool immutable_pic_compilation) :
_arena(mtJVMCI),
_jvmci_env(jvmci_env),
_has_auto_box(false),
_immutable_pic_compilation(immutable_pic_compilation) {}
#if INCLUDE_AOT
JVMCI::CodeInstallResult gather_metadata(JVMCIObject target, JVMCIObject compiled_code, CodeMetadata& metadata, JVMCI_TRAPS);