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src/share/vm/prims/jvmtiClassFileReconstituter.hpp

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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
  26 #define SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
  27 
  28 #include "jvmtifiles/jvmtiEnv.hpp"
  29 
  30 
  31 class JvmtiConstantPoolReconstituter : public StackObj {
  32  private:
  33   int                  _cpool_size;
  34   SymbolHashMap*       _symmap;
  35   SymbolHashMap*       _classmap;
  36   constantPoolHandle   _cpool;
  37   instanceKlassHandle  _ikh;
  38   jvmtiError           _err;
  39 
  40  protected:
  41   instanceKlassHandle  ikh()     { return _ikh; };
  42   constantPoolHandle   cpool()   { return _cpool; };
  43 
  44   u2 symbol_to_cpool_index(Symbol* sym) {
  45     return _symmap->symbol_to_value(sym);
  46   }
  47 
  48   u2 class_symbol_to_cpool_index(Symbol* sym) {
  49     return _classmap->symbol_to_value(sym);
  50   }
  51 
  52  public:
  53   // Calls to this constructor must be proceeded by a ResourceMark
  54   // and a HandleMark
  55   JvmtiConstantPoolReconstituter(instanceKlassHandle ikh){
  56     set_error(JVMTI_ERROR_NONE);
  57     _ikh = ikh;
  58     _cpool = constantPoolHandle(Thread::current(), ikh->constants());
  59     _symmap = new SymbolHashMap();
  60     _classmap = new SymbolHashMap();
  61     _cpool_size = _cpool->hash_entries_to(_symmap, _classmap);
  62     if (_cpool_size == 0) {
  63       set_error(JVMTI_ERROR_OUT_OF_MEMORY);
  64     } else if (_cpool_size < 0) {
  65       set_error(JVMTI_ERROR_INTERNAL);
  66     }
  67   }
  68 
  69   ~JvmtiConstantPoolReconstituter() {
  70     if (_symmap != NULL) {
  71       delete _symmap;
  72       _symmap = NULL;
  73     }
  74     if (_classmap != NULL) {
  75       delete _classmap;
  76       _classmap = NULL;
  77     }
  78   }


 121   void write_line_number_table_attribute(const methodHandle& method, u2 num_entries);
 122   void write_local_variable_table_attribute(const methodHandle& method, u2 num_entries);
 123   void write_local_variable_type_table_attribute(const methodHandle& method, u2 num_entries);
 124   void write_stackmap_table_attribute(const methodHandle& method, int stackmap_table_len);
 125   u2 inner_classes_attribute_length();
 126   void write_inner_classes_attribute(int length);
 127   void write_signature_attribute(u2 generic_signaure_index);
 128   void write_attribute_name_index(const char* name);
 129   void write_annotations_attribute(const char* attr_name, AnnotationArray* annos);
 130   void write_bootstrapmethod_attribute();
 131 
 132   address writeable_address(size_t size);
 133   void write_u1(u1 x);
 134   void write_u2(u2 x);
 135   void write_u4(u4 x);
 136   void write_u8(u8 x);
 137 
 138  public:
 139   // Calls to this constructor must be proceeded by a ResourceMark
 140   // and a HandleMark
 141   JvmtiClassFileReconstituter(instanceKlassHandle ikh) :
 142                                       JvmtiConstantPoolReconstituter(ikh) {
 143     _buffer_size = initial_buffer_size;
 144     _buffer = _buffer_ptr = NEW_RESOURCE_ARRAY(u1, _buffer_size);
 145     _thread = Thread::current();
 146     write_class_file_format();
 147   };
 148 
 149   size_t class_file_size()    { return _buffer_ptr - _buffer; }
 150 
 151   u1* class_file_bytes()      { return _buffer; }
 152 
 153   static void copy_bytecodes(const methodHandle& method, unsigned char* bytecodes);
 154 };
 155 
 156 #endif // SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP


  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
  26 #define SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
  27 
  28 #include "jvmtifiles/jvmtiEnv.hpp"
  29 
  30 
  31 class JvmtiConstantPoolReconstituter : public StackObj {
  32  private:
  33   int                  _cpool_size;
  34   SymbolHashMap*       _symmap;
  35   SymbolHashMap*       _classmap;
  36   constantPoolHandle   _cpool;
  37   InstanceKlass*       _ik;
  38   jvmtiError           _err;
  39 
  40  protected:
  41   InstanceKlass*  ik()           { return _ik; };
  42   constantPoolHandle   cpool()   { return _cpool; };
  43 
  44   u2 symbol_to_cpool_index(Symbol* sym) {
  45     return _symmap->symbol_to_value(sym);
  46   }
  47 
  48   u2 class_symbol_to_cpool_index(Symbol* sym) {
  49     return _classmap->symbol_to_value(sym);
  50   }
  51 
  52  public:
  53   // Calls to this constructor must be proceeded by a ResourceMark
  54   // and a HandleMark
  55   JvmtiConstantPoolReconstituter(InstanceKlass* ik){
  56     set_error(JVMTI_ERROR_NONE);
  57     _ik = ik;
  58     _cpool = constantPoolHandle(Thread::current(), ik->constants());
  59     _symmap = new SymbolHashMap();
  60     _classmap = new SymbolHashMap();
  61     _cpool_size = _cpool->hash_entries_to(_symmap, _classmap);
  62     if (_cpool_size == 0) {
  63       set_error(JVMTI_ERROR_OUT_OF_MEMORY);
  64     } else if (_cpool_size < 0) {
  65       set_error(JVMTI_ERROR_INTERNAL);
  66     }
  67   }
  68 
  69   ~JvmtiConstantPoolReconstituter() {
  70     if (_symmap != NULL) {
  71       delete _symmap;
  72       _symmap = NULL;
  73     }
  74     if (_classmap != NULL) {
  75       delete _classmap;
  76       _classmap = NULL;
  77     }
  78   }


 121   void write_line_number_table_attribute(const methodHandle& method, u2 num_entries);
 122   void write_local_variable_table_attribute(const methodHandle& method, u2 num_entries);
 123   void write_local_variable_type_table_attribute(const methodHandle& method, u2 num_entries);
 124   void write_stackmap_table_attribute(const methodHandle& method, int stackmap_table_len);
 125   u2 inner_classes_attribute_length();
 126   void write_inner_classes_attribute(int length);
 127   void write_signature_attribute(u2 generic_signaure_index);
 128   void write_attribute_name_index(const char* name);
 129   void write_annotations_attribute(const char* attr_name, AnnotationArray* annos);
 130   void write_bootstrapmethod_attribute();
 131 
 132   address writeable_address(size_t size);
 133   void write_u1(u1 x);
 134   void write_u2(u2 x);
 135   void write_u4(u4 x);
 136   void write_u8(u8 x);
 137 
 138  public:
 139   // Calls to this constructor must be proceeded by a ResourceMark
 140   // and a HandleMark
 141   JvmtiClassFileReconstituter(InstanceKlass* ik) :
 142                                       JvmtiConstantPoolReconstituter(ik) {
 143     _buffer_size = initial_buffer_size;
 144     _buffer = _buffer_ptr = NEW_RESOURCE_ARRAY(u1, _buffer_size);
 145     _thread = Thread::current();
 146     write_class_file_format();
 147   };
 148 
 149   size_t class_file_size()    { return _buffer_ptr - _buffer; }
 150 
 151   u1* class_file_bytes()      { return _buffer; }
 152 
 153   static void copy_bytecodes(const methodHandle& method, unsigned char* bytecodes);
 154 };
 155 
 156 #endif // SHARE_VM_PRIMS_JVMTICLASSFILERECONSTITUTER_HPP
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