--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/ci/ciEnv.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,472 @@
+/*
+ * Copyright (c) 1999, 2016, 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_CI_CIENV_HPP
+#define SHARE_VM_CI_CIENV_HPP
+
+#include "ci/ciClassList.hpp"
+#include "ci/ciObjectFactory.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;
+
+// ciEnv
+//
+// This class is the top level broker for requests from the compiler
+// to the VM.
+class ciEnv : StackObj {
+ CI_PACKAGE_ACCESS_TO
+
+ friend class CompileBroker;
+ friend class Dependencies; // for get_object, during logging
+
+private:
+ Arena* _arena; // Alias for _ciEnv_arena except in init_shared_objects()
+ Arena _ciEnv_arena;
+ int _system_dictionary_modification_counter;
+ ciObjectFactory* _factory;
+ OopRecorder* _oop_recorder;
+ DebugInformationRecorder* _debug_info;
+ Dependencies* _dependencies;
+ const char* _failure_reason;
+ bool _inc_decompile_count_on_failure;
+ int _compilable;
+ bool _break_at_compile;
+ int _num_inlined_bytecodes;
+ CompileTask* _task; // faster access to CompilerThread::task
+ CompileLog* _log; // faster access to CompilerThread::log
+ void* _compiler_data; // compiler-specific stuff, if any
+
+ char* _name_buffer;
+ int _name_buffer_len;
+
+ // Cache Jvmti state
+ bool _jvmti_can_hotswap_or_post_breakpoint;
+ bool _jvmti_can_access_local_variables;
+ bool _jvmti_can_post_on_exceptions;
+ bool _jvmti_can_pop_frame;
+
+ // Cache DTrace flags
+ bool _dtrace_extended_probes;
+ bool _dtrace_monitor_probes;
+ bool _dtrace_method_probes;
+ bool _dtrace_alloc_probes;
+
+ // Distinguished instances of certain ciObjects..
+ static ciObject* _null_object_instance;
+
+#define WK_KLASS_DECL(name, ignore_s, ignore_o) static ciInstanceKlass* _##name;
+ WK_KLASSES_DO(WK_KLASS_DECL)
+#undef WK_KLASS_DECL
+
+ static ciSymbol* _unloaded_cisymbol;
+ static ciInstanceKlass* _unloaded_ciinstance_klass;
+ static ciObjArrayKlass* _unloaded_ciobjarrayklass;
+
+ static jobject _ArrayIndexOutOfBoundsException_handle;
+ static jobject _ArrayStoreException_handle;
+ static jobject _ClassCastException_handle;
+
+ ciInstance* _NullPointerException_instance;
+ ciInstance* _ArithmeticException_instance;
+ ciInstance* _ArrayIndexOutOfBoundsException_instance;
+ ciInstance* _ArrayStoreException_instance;
+ ciInstance* _ClassCastException_instance;
+
+ ciInstance* _the_null_string; // The Java string "null"
+ ciInstance* _the_min_jint_string; // The Java string "-2147483648"
+
+ // 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.
+ ciKlass* get_klass_by_name(ciKlass* accessing_klass,
+ ciSymbol* klass_name,
+ bool require_local);
+
+ // Constant pool access.
+ ciKlass* get_klass_by_index(const constantPoolHandle& cpool,
+ int klass_index,
+ bool& is_accessible,
+ ciInstanceKlass* loading_klass);
+ ciConstant get_constant_by_index(const constantPoolHandle& cpool,
+ int pool_index, int cache_index,
+ ciInstanceKlass* accessor);
+ ciField* get_field_by_index(ciInstanceKlass* loading_klass,
+ int field_index);
+ ciMethod* get_method_by_index(const constantPoolHandle& cpool,
+ int method_index, Bytecodes::Code bc,
+ ciInstanceKlass* loading_klass);
+
+ // Implementation methods for loading and constant pool access.
+ ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass,
+ const constantPoolHandle& cpool,
+ ciSymbol* klass_name,
+ bool require_local);
+ ciKlass* get_klass_by_index_impl(const constantPoolHandle& cpool,
+ int klass_index,
+ bool& is_accessible,
+ ciInstanceKlass* loading_klass);
+ ciConstant get_constant_by_index_impl(const constantPoolHandle& cpool,
+ int pool_index, int cache_index,
+ ciInstanceKlass* loading_klass);
+ ciField* get_field_by_index_impl(ciInstanceKlass* loading_klass,
+ int field_index);
+ ciMethod* get_method_by_index_impl(const constantPoolHandle& cpool,
+ int method_index, Bytecodes::Code bc,
+ ciInstanceKlass* loading_klass);
+
+ // Helper methods
+ bool check_klass_accessibility(ciKlass* accessing_klass,
+ Klass* resolved_klass);
+ Method* lookup_method(ciInstanceKlass* accessor,
+ ciKlass* holder,
+ Symbol* name,
+ Symbol* sig,
+ Bytecodes::Code bc,
+ constantTag tag);
+
+ // Get a ciObject from the object factory. Ensures uniqueness
+ // of ciObjects.
+ ciObject* get_object(oop o) {
+ if (o == NULL) {
+ return _null_object_instance;
+ } else {
+ return _factory->get(o);
+ }
+ }
+
+ ciSymbol* get_symbol(Symbol* o) {
+ if (o == NULL) {
+ ShouldNotReachHere();
+ return NULL;
+ } else {
+ return _factory->get_symbol(o);
+ }
+ }
+
+ ciMetadata* get_metadata(Metadata* o) {
+ if (o == NULL) {
+ return NULL;
+ } else {
+ return _factory->get_metadata(o);
+ }
+ }
+
+ void ensure_metadata_alive(ciMetadata* m) {
+ _factory->ensure_metadata_alive(m);
+ }
+
+ ciInstance* get_instance(oop o) {
+ if (o == NULL) return NULL;
+ return get_object(o)->as_instance();
+ }
+ ciObjArrayKlass* get_obj_array_klass(Klass* o) {
+ if (o == NULL) return NULL;
+ return get_metadata(o)->as_obj_array_klass();
+ }
+ ciTypeArrayKlass* get_type_array_klass(Klass* o) {
+ if (o == NULL) return NULL;
+ return get_metadata(o)->as_type_array_klass();
+ }
+ ciKlass* get_klass(Klass* o) {
+ if (o == NULL) return NULL;
+ return get_metadata(o)->as_klass();
+ }
+ ciInstanceKlass* get_instance_klass(Klass* o) {
+ if (o == NULL) return NULL;
+ return get_metadata(o)->as_instance_klass();
+ }
+ ciMethod* get_method(Method* o) {
+ if (o == NULL) return NULL;
+ return get_metadata(o)->as_method();
+ }
+ ciMethodData* get_method_data(MethodData* o) {
+ if (o == NULL) return NULL;
+ return get_metadata(o)->as_method_data();
+ }
+
+ ciMethod* get_method_from_handle(Method* method);
+
+ ciInstance* get_or_create_exception(jobject& handle, Symbol* name);
+
+ // Get a ciMethod representing either an unfound method or
+ // a method with an unloaded holder. Ensures uniqueness of
+ // the result.
+ ciMethod* get_unloaded_method(ciKlass* holder,
+ ciSymbol* name,
+ ciSymbol* signature,
+ ciInstanceKlass* accessor) {
+ ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
+ return _factory->get_unloaded_method(declared_holder, name, signature, accessor);
+ }
+
+ // Get a ciKlass representing an unloaded klass.
+ // Ensures uniqueness of the result.
+ ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
+ ciSymbol* name) {
+ return _factory->get_unloaded_klass(accessing_klass, name, true);
+ }
+
+ // Get a ciKlass representing an unloaded klass mirror.
+ // Result is not necessarily unique, but will be unloaded.
+ ciInstance* get_unloaded_klass_mirror(ciKlass* type) {
+ return _factory->get_unloaded_klass_mirror(type);
+ }
+
+ // Get a ciInstance representing an unresolved method handle constant.
+ ciInstance* get_unloaded_method_handle_constant(ciKlass* holder,
+ ciSymbol* name,
+ ciSymbol* signature,
+ int ref_kind) {
+ return _factory->get_unloaded_method_handle_constant(holder, name, signature, ref_kind);
+ }
+
+ // Get a ciInstance representing an unresolved method type constant.
+ ciInstance* get_unloaded_method_type_constant(ciSymbol* signature) {
+ return _factory->get_unloaded_method_type_constant(signature);
+ }
+
+ // See if we already have an unloaded klass for the given name
+ // or return NULL if not.
+ ciKlass *check_get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name) {
+ return _factory->get_unloaded_klass(accessing_klass, name, false);
+ }
+
+ // Get a ciReturnAddress corresponding to the given bci.
+ // Ensures uniqueness of the result.
+ ciReturnAddress* get_return_address(int bci) {
+ return _factory->get_return_address(bci);
+ }
+
+ // Get a ciMethodData representing the methodData for a method
+ // with none.
+ ciMethodData* get_empty_methodData() {
+ return _factory->get_empty_methodData();
+ }
+
+ // General utility : get a buffer of some required length.
+ // Used in symbol creation.
+ char* name_buffer(int req_len);
+
+ // 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 method dependencies (e.g. concurrent class loading).
+ void validate_compile_task_dependencies(ciMethod* target);
+
+public:
+ enum {
+ MethodCompilable,
+ MethodCompilable_not_at_tier,
+ MethodCompilable_never
+ };
+
+ ciEnv(CompileTask* task, int system_dictionary_modification_counter);
+ // Used only during initialization of the ci
+ ciEnv(Arena* arena);
+ ~ciEnv();
+
+ OopRecorder* oop_recorder() { return _oop_recorder; }
+ void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; }
+
+ DebugInformationRecorder* debug_info() { return _debug_info; }
+ void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; }
+
+ Dependencies* dependencies() { return _dependencies; }
+ void set_dependencies(Dependencies* d) { _dependencies = d; }
+
+ // This is true if the compilation is not going to produce code.
+ // (It is reasonable to retry failed compilations.)
+ bool failing() { return _failure_reason != NULL; }
+
+ // Reason this compilation is failing, such as "too many basic blocks".
+ const char* failure_reason() { return _failure_reason; }
+
+ // Return state of appropriate compilability
+ int compilable() { return _compilable; }
+
+ const char* retry_message() const {
+ switch (_compilable) {
+ case ciEnv::MethodCompilable_not_at_tier:
+ return "retry at different tier";
+ case ciEnv::MethodCompilable_never:
+ return "not retryable";
+ case ciEnv::MethodCompilable:
+ return NULL;
+ default:
+ ShouldNotReachHere();
+ return NULL;
+ }
+ }
+
+ bool break_at_compile() { return _break_at_compile; }
+ void set_break_at_compile(bool z) { _break_at_compile = z; }
+
+ // Cache Jvmti state
+ void cache_jvmti_state();
+ bool jvmti_state_changed() const;
+ bool should_retain_local_variables() const;
+ bool jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint; }
+ bool jvmti_can_post_on_exceptions() const { return _jvmti_can_post_on_exceptions; }
+
+ // Cache DTrace flags
+ void cache_dtrace_flags();
+ bool dtrace_extended_probes() const { return _dtrace_extended_probes; }
+ bool dtrace_monitor_probes() const { return _dtrace_monitor_probes; }
+ bool dtrace_method_probes() const { return _dtrace_method_probes; }
+ bool dtrace_alloc_probes() const { return _dtrace_alloc_probes; }
+
+ // The compiler task which has created this env.
+ // May be useful to find out compile_id, comp_level, etc.
+ CompileTask* task() { return _task; }
+
+ // Handy forwards to the task:
+ int comp_level(); // task()->comp_level()
+ uint compile_id(); // task()->compile_id()
+
+ // Register the result of a compilation.
+ void register_method(ciMethod* target,
+ int entry_bci,
+ CodeOffsets* offsets,
+ int orig_pc_offset,
+ CodeBuffer* code_buffer,
+ int frame_words,
+ OopMapSet* oop_map_set,
+ ExceptionHandlerTable* handler_table,
+ ImplicitExceptionTable* inc_table,
+ AbstractCompiler* compiler,
+ bool has_unsafe_access,
+ bool has_wide_vectors,
+ RTMState rtm_state = NoRTM);
+
+
+ // Access to certain well known ciObjects.
+#define WK_KLASS_FUNC(name, ignore_s, ignore_o) \
+ ciInstanceKlass* name() { \
+ return _##name;\
+ }
+ WK_KLASSES_DO(WK_KLASS_FUNC)
+#undef WK_KLASS_FUNC
+
+ ciInstance* NullPointerException_instance() {
+ assert(_NullPointerException_instance != NULL, "initialization problem");
+ return _NullPointerException_instance;
+ }
+ ciInstance* ArithmeticException_instance() {
+ assert(_ArithmeticException_instance != NULL, "initialization problem");
+ return _ArithmeticException_instance;
+ }
+
+ // Lazy constructors:
+ ciInstance* ArrayIndexOutOfBoundsException_instance();
+ ciInstance* ArrayStoreException_instance();
+ ciInstance* ClassCastException_instance();
+
+ ciInstance* the_null_string();
+ ciInstance* the_min_jint_string();
+
+ static ciSymbol* unloaded_cisymbol() {
+ return _unloaded_cisymbol;
+ }
+ static ciObjArrayKlass* unloaded_ciobjarrayklass() {
+ return _unloaded_ciobjarrayklass;
+ }
+ static ciInstanceKlass* unloaded_ciinstance_klass() {
+ return _unloaded_ciinstance_klass;
+ }
+ ciInstance* unloaded_ciinstance();
+
+ ciKlass* find_system_klass(ciSymbol* klass_name);
+ // Note: To find a class from its name string, use ciSymbol::make,
+ // but consider adding to vmSymbols.hpp instead.
+
+ // converts the ciKlass* representing the holder of a method into a
+ // ciInstanceKlass*. 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 ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass);
+
+ // Return the machine-level offset of o, which must be an element of a.
+ // This may be used to form constant-loading expressions in lieu of simpler encodings.
+ int array_element_offset_in_bytes(ciArray* a, ciObject* o);
+
+ // Access to the compile-lifetime allocation arena.
+ Arena* arena() { return _arena; }
+
+ // What is the current compilation environment?
+ static ciEnv* current() { return CompilerThread::current()->env(); }
+
+ // Overload with current thread argument
+ static ciEnv* current(CompilerThread *thread) { return thread->env(); }
+
+ // Per-compiler data. (Used by C2 to publish the Compile* pointer.)
+ void* compiler_data() { return _compiler_data; }
+ void set_compiler_data(void* x) { _compiler_data = x; }
+
+ // Notice that a method has been inlined in the current compile;
+ // used only for statistics.
+ void notice_inlined_method(ciMethod* method);
+
+ // Total number of bytecodes in inlined methods in this compile
+ int num_inlined_bytecodes() const;
+
+ // Output stream for logging compilation info.
+ CompileLog* log() { return _log; }
+ void set_log(CompileLog* log) { _log = log; }
+
+ // Check for changes to the system dictionary during compilation
+ bool system_dictionary_modification_counter_changed();
+
+ void record_failure(const char* reason); // Record failure and report later
+ void report_failure(const char* reason); // Report failure immediately
+ void record_method_not_compilable(const char* reason, bool all_tiers = true);
+ void record_out_of_memory_failure();
+
+ // RedefineClasses support
+ void metadata_do(void f(Metadata*)) { _factory->metadata_do(f); }
+
+ // Dump the compilation replay data for the ciEnv to the stream.
+ void dump_replay_data(int compile_id);
+ void dump_inline_data(int compile_id);
+ void dump_replay_data(outputStream* out);
+ void dump_replay_data_unsafe(outputStream* out);
+ void dump_compile_data(outputStream* out);
+};
+
+#endif // SHARE_VM_CI_CIENV_HPP