hotspot/src/share/vm/classfile/javaClasses.inline.hpp

*** 71,76 ****
--- 71,139 ----
  
  inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
    return obj != NULL && is_subclass(obj->klass());
  }
  
+ inline int Backtrace::merge_bci_and_version(int bci, int version) {
+   // only store u2 for version, checking for overflow.
+   if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
+   assert((jushort)bci == bci, "bci should be short");
+   return build_int_from_shorts(version, bci);
+ }
+ 
+ inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
+   // only store u2 for mid and cpref, checking for overflow.
+   assert((jushort)mid == mid, "mid should be short");
+   assert((jushort)cpref == cpref, "cpref should be short");
+   return build_int_from_shorts(cpref, mid);
+ }
+ 
+ inline int Backtrace::bci_at(unsigned int merged) {
+   return extract_high_short_from_int(merged);
+ }
+ 
+ inline int Backtrace::version_at(unsigned int merged) {
+   return extract_low_short_from_int(merged);
+ }
+ 
+ inline int Backtrace::mid_at(unsigned int merged) {
+   return extract_high_short_from_int(merged);
+ }
+ 
+ inline int Backtrace::cpref_at(unsigned int merged) {
+   return extract_low_short_from_int(merged);
+ }
+ 
+ inline int Backtrace::get_line_number(const methodHandle& method, int bci) {
+   int line_number = 0;
+   if (method->is_native()) {
+     // Negative value different from -1 below, enabling Java code in
+     // class java.lang.StackTraceElement to distinguish "native" from
+     // "no LineNumberTable".  JDK tests for -2.
+     line_number = -2;
+   } else {
+     // Returns -1 if no LineNumberTable, and otherwise actual line number
+     line_number = method->line_number_from_bci(bci);
+     if (line_number == -1 && ShowHiddenFrames) {
+       line_number = bci + 1000000;
+     }
+   }
+   return line_number;
+ }
+ 
+ /*
+  * Returns the source file name of a given InstanceKlass and version
+  */
+ inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) {
+   // Find the specific ik version that contains this source_file_name_index
+   // via the previous versions list, but use the current version's
+   // constant pool to look it up.  The previous version's index has been
+   // merged for the current constant pool.
+   InstanceKlass* ik = holder->get_klass_version(version);
+   // This version has been cleaned up.
+   if (ik == NULL) return NULL;
+   int source_file_name_index = ik->source_file_name_index();
+   return (source_file_name_index == 0) ?
+       (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index);
+ }
+ 
  #endif // SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP