61 enum CodeInstallResult {
62 ok,
63 dependencies_failed,
64 dependencies_invalid,
65 cache_full,
66 code_too_large
67 };
68
69 // Look up a klass by name from a particular class loader (the accessor's).
70 // If require_local, result must be defined in that class loader, or NULL.
71 // If !require_local, a result from remote class loader may be reported,
72 // if sufficient class loader constraints exist such that initiating
73 // a class loading request from the given loader is bound to return
74 // the class defined in the remote loader (or throw an error).
75 //
76 // Return an unloaded klass if !require_local and no class at all is found.
77 //
78 // The CI treats a klass as loaded if it is consistently defined in
79 // another loader, even if it hasn't yet been loaded in all loaders
80 // that could potentially see it via delegation.
81 static KlassHandle get_klass_by_name(KlassHandle& accessing_klass,
82 Symbol* klass_name,
83 bool require_local);
84
85 // Constant pool access.
86 static KlassHandle get_klass_by_index(constantPoolHandle& cpool,
87 int klass_index,
88 bool& is_accessible,
89 KlassHandle& loading_klass);
90 static void get_field_by_index(instanceKlassHandle& loading_klass, fieldDescriptor& fd,
91 int field_index);
92 static methodHandle get_method_by_index(constantPoolHandle& cpool,
93 int method_index, Bytecodes::Code bc,
94 instanceKlassHandle& loading_klass);
95
96 JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter);
97
98 private:
99 CompileTask* _task;
100 int _system_dictionary_modification_counter;
101
102 // Cache JVMTI state
103 bool _jvmti_can_hotswap_or_post_breakpoint;
104 bool _jvmti_can_access_local_variables;
105 bool _jvmti_can_post_on_exceptions;
106
107 // Implementation methods for loading and constant pool access.
108 static KlassHandle get_klass_by_name_impl(KlassHandle& accessing_klass,
109 constantPoolHandle& cpool,
110 Symbol* klass_name,
111 bool require_local);
112 static KlassHandle get_klass_by_index_impl(constantPoolHandle& cpool,
113 int klass_index,
114 bool& is_accessible,
115 KlassHandle& loading_klass);
116 static void get_field_by_index_impl(instanceKlassHandle& loading_klass, fieldDescriptor& fd,
117 int field_index);
118 static methodHandle get_method_by_index_impl(constantPoolHandle& cpool,
119 int method_index, Bytecodes::Code bc,
120 instanceKlassHandle& loading_klass);
121
122 // Helper methods
123 static bool check_klass_accessibility(KlassHandle accessing_klass, KlassHandle resolved_klass);
124 static methodHandle lookup_method(instanceKlassHandle& accessor,
125 instanceKlassHandle& holder,
126 Symbol* name,
127 Symbol* sig,
128 Bytecodes::Code bc);
129
130 private:
131
132 // Is this thread currently in the VM state?
133 static bool is_in_vm();
134
135 // Helper routine for determining the validity of a compilation
136 // with respect to concurrent class loading.
137 static JVMCIEnv::CodeInstallResult check_for_system_dictionary_modification(Dependencies* target, Handle compiled_code,
138 JVMCIEnv* env, char** failure_detail);
139
140 public:
141 CompileTask* task() { return _task; }
142
143 // Register the result of a compilation.
144 static JVMCIEnv::CodeInstallResult register_method(
145 methodHandle& target,
146 nmethod*& nm,
147 int entry_bci,
148 CodeOffsets* offsets,
149 int orig_pc_offset,
150 CodeBuffer* code_buffer,
151 int frame_words,
152 OopMapSet* oop_map_set,
153 ExceptionHandlerTable* handler_table,
154 AbstractCompiler* compiler,
155 DebugInformationRecorder* debug_info,
156 Dependencies* dependencies,
157 JVMCIEnv* env,
158 int compile_id,
159 bool has_unsafe_access,
160 bool has_wide_vector,
161 Handle installed_code,
162 Handle compiled_code,
163 Handle speculation_log);
164
165 // converts the Klass* representing the holder of a method into a
166 // InstanceKlass*. This is needed since the holder of a method in
167 // the bytecodes could be an array type. Basically this converts
168 // array types into java/lang/Object and other types stay as they are.
169 static instanceKlassHandle get_instance_klass_for_declared_method_holder(KlassHandle& klass);
170 };
171
172 #endif // SHARE_VM_JVMCI_JVMCIENV_HPP
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61 enum CodeInstallResult {
62 ok,
63 dependencies_failed,
64 dependencies_invalid,
65 cache_full,
66 code_too_large
67 };
68
69 // Look up a klass by name from a particular class loader (the accessor's).
70 // If require_local, result must be defined in that class loader, or NULL.
71 // If !require_local, a result from remote class loader may be reported,
72 // if sufficient class loader constraints exist such that initiating
73 // a class loading request from the given loader is bound to return
74 // the class defined in the remote loader (or throw an error).
75 //
76 // Return an unloaded klass if !require_local and no class at all is found.
77 //
78 // The CI treats a klass as loaded if it is consistently defined in
79 // another loader, even if it hasn't yet been loaded in all loaders
80 // that could potentially see it via delegation.
81 static KlassHandle get_klass_by_name(KlassHandle accessing_klass,
82 Symbol* klass_name,
83 bool require_local);
84
85 // Constant pool access.
86 static KlassHandle get_klass_by_index(const constantPoolHandle& cpool,
87 int klass_index,
88 bool& is_accessible,
89 KlassHandle loading_klass);
90 static void get_field_by_index(instanceKlassHandle loading_klass, fieldDescriptor& fd,
91 int field_index);
92 static methodHandle get_method_by_index(const constantPoolHandle& cpool,
93 int method_index, Bytecodes::Code bc,
94 instanceKlassHandle loading_klass);
95
96 JVMCIEnv(CompileTask* task, int system_dictionary_modification_counter);
97
98 private:
99 CompileTask* _task;
100 int _system_dictionary_modification_counter;
101
102 // Cache JVMTI state
103 bool _jvmti_can_hotswap_or_post_breakpoint;
104 bool _jvmti_can_access_local_variables;
105 bool _jvmti_can_post_on_exceptions;
106
107 // Implementation methods for loading and constant pool access.
108 static KlassHandle get_klass_by_name_impl(KlassHandle accessing_klass,
109 const constantPoolHandle& cpool,
110 Symbol* klass_name,
111 bool require_local);
112 static KlassHandle get_klass_by_index_impl(const constantPoolHandle& cpool,
113 int klass_index,
114 bool& is_accessible,
115 KlassHandle loading_klass);
116 static void get_field_by_index_impl(instanceKlassHandle loading_klass, fieldDescriptor& fd,
117 int field_index);
118 static methodHandle get_method_by_index_impl(const constantPoolHandle& cpool,
119 int method_index, Bytecodes::Code bc,
120 instanceKlassHandle loading_klass);
121
122 // Helper methods
123 static bool check_klass_accessibility(KlassHandle accessing_klass, KlassHandle resolved_klass);
124 static methodHandle lookup_method(instanceKlassHandle accessor,
125 instanceKlassHandle holder,
126 Symbol* name,
127 Symbol* sig,
128 Bytecodes::Code bc);
129
130 private:
131
132 // Is this thread currently in the VM state?
133 static bool is_in_vm();
134
135 // Helper routine for determining the validity of a compilation
136 // with respect to concurrent class loading.
137 static JVMCIEnv::CodeInstallResult check_for_system_dictionary_modification(Dependencies* target, Handle compiled_code,
138 JVMCIEnv* env, char** failure_detail);
139
140 public:
141 CompileTask* task() { return _task; }
142
143 // Register the result of a compilation.
144 static JVMCIEnv::CodeInstallResult register_method(
145 const methodHandle& target,
146 nmethod*& nm,
147 int entry_bci,
148 CodeOffsets* offsets,
149 int orig_pc_offset,
150 CodeBuffer* code_buffer,
151 int frame_words,
152 OopMapSet* oop_map_set,
153 ExceptionHandlerTable* handler_table,
154 AbstractCompiler* compiler,
155 DebugInformationRecorder* debug_info,
156 Dependencies* dependencies,
157 JVMCIEnv* env,
158 int compile_id,
159 bool has_unsafe_access,
160 bool has_wide_vector,
161 Handle installed_code,
162 Handle compiled_code,
163 Handle speculation_log);
164
165 // converts the Klass* representing the holder of a method into a
166 // InstanceKlass*. This is needed since the holder of a method in
167 // the bytecodes could be an array type. Basically this converts
168 // array types into java/lang/Object and other types stay as they are.
169 static instanceKlassHandle get_instance_klass_for_declared_method_holder(KlassHandle klass);
170 };
171
172 #endif // SHARE_VM_JVMCI_JVMCIENV_HPP
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