--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/jvmci/jvmciEnv.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,184 @@
+/*
+ * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_JVMCI_JVMCIENV_HPP
+#define SHARE_VM_JVMCI_JVMCIENV_HPP
+
+#include "classfile/systemDictionary.hpp"
+#include "code/debugInfoRec.hpp"
+#include "code/dependencies.hpp"
+#include "code/exceptionHandlerTable.hpp"
+#include "compiler/oopMap.hpp"
+#include "runtime/thread.hpp"
+
+class CompileTask;
+
+// Bring the JVMCI compiler thread into the VM state.
+#define JVMCI_VM_ENTRY_MARK \
+ JavaThread* thread = JavaThread::current(); \
+ ThreadInVMfromNative __tiv(thread); \
+ ResetNoHandleMark rnhm; \
+ HandleMarkCleaner __hm(thread); \
+ Thread* THREAD = thread; \
+ debug_only(VMNativeEntryWrapper __vew;)
+
+#define JVMCI_EXCEPTION_CONTEXT \
+ JavaThread* thread=JavaThread::current(); \
+ Thread* THREAD = thread;
+
+//
+// This class is the top level broker for requests from the compiler
+// to the VM.
+class JVMCIEnv : StackObj {
+ CI_PACKAGE_ACCESS_TO
+
+ friend class JVMCIVMStructs;
+ friend class CompileBroker;
+ friend class Dependencies; // for get_object, during logging
+
+public:
+
+ enum CodeInstallResult {
+ ok,
+ dependencies_failed,
+ dependencies_invalid,
+ cache_full,
+ code_too_large
+ };
+
+ // Look up a klass by name from a particular class loader (the accessor's).
+ // If require_local, result must be defined in that class loader, or NULL.
+ // If !require_local, a result from remote class loader may be reported,
+ // if sufficient class loader constraints exist such that initiating
+ // a class loading request from the given loader is bound to return
+ // the class defined in the remote loader (or throw an error).
+ //
+ // Return an unloaded klass if !require_local and no class at all is found.
+ //
+ // The CI treats a klass as loaded if it is consistently defined in
+ // another loader, even if it hasn't yet been loaded in all loaders
+ // that could potentially see it via delegation.
+ static Klass* get_klass_by_name(Klass* accessing_klass, Symbol* klass_name, bool require_local);
+
+ // Constant pool access.
+ static Klass* get_klass_by_index(const constantPoolHandle& cpool,
+ int klass_index,
+ bool& is_accessible,
+ Klass* loading_klass);
+ static void get_field_by_index(InstanceKlass* loading_klass, fieldDescriptor& fd,
+ int field_index);
+ static methodHandle get_method_by_index(const constantPoolHandle& cpool,
+ int method_index, Bytecodes::Code bc,
+ InstanceKlass* loading_klass);
+
+ JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter);
+
+private:
+ CompileTask* _task;
+ int _system_dictionary_modification_counter;
+
+ // Compilation result values
+ const char* _failure_reason;
+ bool _retryable;
+
+ // Cache JVMTI state
+ bool _jvmti_can_hotswap_or_post_breakpoint;
+ bool _jvmti_can_access_local_variables;
+ bool _jvmti_can_post_on_exceptions;
+
+ // Implementation methods for loading and constant pool access.
+ static Klass* get_klass_by_name_impl(Klass* accessing_klass,
+ const constantPoolHandle& cpool,
+ Symbol* klass_name,
+ bool require_local);
+ static Klass* get_klass_by_index_impl(const constantPoolHandle& cpool,
+ int klass_index,
+ bool& is_accessible,
+ Klass* loading_klass);
+ static void get_field_by_index_impl(InstanceKlass* loading_klass, fieldDescriptor& fd,
+ int field_index);
+ static methodHandle get_method_by_index_impl(const constantPoolHandle& cpool,
+ int method_index, Bytecodes::Code bc,
+ InstanceKlass* loading_klass);
+
+ // Helper methods
+ static bool check_klass_accessibility(Klass* accessing_klass, Klass* resolved_klass);
+ static methodHandle lookup_method(InstanceKlass* accessor,
+ Klass* holder,
+ Symbol* name,
+ Symbol* sig,
+ Bytecodes::Code bc,
+ constantTag tag);
+
+ private:
+
+ // Is this thread currently in the VM state?
+ static bool is_in_vm();
+
+ // Helper routine for determining the validity of a compilation
+ // with respect to concurrent class loading.
+ static JVMCIEnv::CodeInstallResult check_for_system_dictionary_modification(Dependencies* target, Handle compiled_code,
+ JVMCIEnv* env, char** failure_detail);
+
+public:
+ CompileTask* task() { return _task; }
+
+ const char* failure_reason() { return _failure_reason; }
+ bool retryable() { return _retryable; }
+
+ void set_failure(const char* reason, bool retryable) {
+ _failure_reason = reason;
+ _retryable = retryable;
+ }
+
+ // Register the result of a compilation.
+ static JVMCIEnv::CodeInstallResult register_method(
+ const methodHandle& target,
+ nmethod*& nm,
+ int entry_bci,
+ CodeOffsets* offsets,
+ int orig_pc_offset,
+ CodeBuffer* code_buffer,
+ int frame_words,
+ OopMapSet* oop_map_set,
+ ExceptionHandlerTable* handler_table,
+ AbstractCompiler* compiler,
+ DebugInformationRecorder* debug_info,
+ Dependencies* dependencies,
+ JVMCIEnv* env,
+ int compile_id,
+ bool has_unsafe_access,
+ bool has_wide_vector,
+ Handle installed_code,
+ Handle compiled_code,
+ Handle speculation_log);
+
+ // converts the Klass* representing the holder of a method into a
+ // InstanceKlass*. This is needed since the holder of a method in
+ // the bytecodes could be an array type. Basically this converts
+ // array types into java/lang/Object and other types stay as they are.
+ static InstanceKlass* get_instance_klass_for_declared_method_holder(Klass* klass);
+};
+
+#endif // SHARE_VM_JVMCI_JVMCIENV_HPP