java-interp.h (insn_index): New declaration.

* include/java-interp.h (insn_index): New declaration.
        (num_insn_slots): New private variable.
        (get_line_table): New declaration.
        * interpret.cc (insn_index): New function.
        (get_line_table): New function.

From-SVN: r110411

libjava/ChangeLog

@@ -1,3 +1,11 @@
+2006-01-30  Keith Seitz  <keiths@redhat.com>
+
+	* include/java-interp.h (insn_index): New declaration.
+	(num_insn_slots): New private variable.
+	(get_line_table): New declaration.
+	* interpret.cc (insn_index): New function.
+	(get_line_table): New function.
+
 2006-01-24  Archit Shah  <ashah@redhat.com>
 	    Tom Tromey  <tromey@redhat.com>
 

libjava/include/java-interp.h

@@ -145,6 +145,7 @@ class _Jv_InterpMethod : public _Jv_MethodBase
   _Jv_LineTableEntry *line_table;
 
   void *prepared;
+  int number_insn_slots;
 
   unsigned char* bytecode () 
   {
@@ -182,9 +183,24 @@ class _Jv_InterpMethod : public _Jv_MethodBase
   // number info is unavailable.
   int get_source_line(pc_t mpc);
 
+#ifdef DIRECT_THREADED
+  // Convenience function for indexing bytecode PC/insn slots in
+  // line tables for JDWP
+  jlong insn_index (pc_t pc);
+#endif
+
  public:
   static void dump_object(jobject o);
 
+  /* Get the line table for this method.
+   * start  is the lowest index in the method
+   * end    is the  highest index in the method
+   * line_numbers is an array to hold the list of source line numbers
+   * code_indices is an array to hold the corresponding list of code indices
+   */
+  void get_line_table (jlong& start, jlong& end, jintArray& line_numbers,
+		       jlongArray& code_indices);
+
 #ifdef DIRECT_THREADED
   friend void _Jv_CompileMethod (_Jv_InterpMethod*);
 #endif

libjava/interpret.cc

@@ -330,6 +330,7 @@ _Jv_InterpMethod::compile (const void * const *insn_targets)
       if (! first_pass)
 	{
 	  insns = (insn_slot *) _Jv_AllocBytes (sizeof (insn_slot) * next);
+	  number_insn_slots = next;
 	  next = 0;
 	}
 
@@ -3672,6 +3673,80 @@ _Jv_InterpMethod::ncode ()
   return self->ncode;
 }
 
+#ifdef DIRECT_THREADED
+/* Find the index of the given insn in the array of insn slots
+   for this method. Returns -1 if not found. */
+jlong
+_Jv_InterpMethod::insn_index (pc_t pc)
+{
+  jlong left = 0;
+  jlong right = number_insn_slots;
+  insn_slot* slots = reinterpret_cast<insn_slot*> (prepared);
+
+  while (right >= 0)
+    {
+      jlong mid = (left + right) / 2;
+      if (&slots[mid] == pc)
+	return mid;
+
+      if (pc < &slots[mid])
+	right = mid - 1;
+      else
+        left = mid + 1;
+    }
+
+  return -1;
+}
+#endif // DIRECT_THREADED
+
+void
+_Jv_InterpMethod::get_line_table (jlong& start, jlong& end,
+				  jintArray& line_numbers,
+				  jlongArray& code_indices)
+{
+#ifdef DIRECT_THREADED
+  /* For the DIRECT_THREADED case, if the method has not yet been
+   * compiled, the linetable will change to insn slots instead of
+   * bytecode PCs. It is probably easiest, in this case, to simply
+   * compile the method and guarantee that we are using insn
+   * slots.
+   */
+  _Jv_CompileMethod (this);
+
+  if (line_table_len > 0)
+    {
+      start = 0;
+      end = number_insn_slots;
+      line_numbers = JvNewIntArray (line_table_len);
+      code_indices = JvNewLongArray (line_table_len);
+
+      jint* lines = elements (line_numbers);
+      jlong* indices = elements (code_indices);
+      for (int i = 0; i < line_table_len; ++i)
+	{
+	  lines[i] = line_table[i].line;
+	  indices[i] = insn_index (line_table[i].pc);
+	}
+    }
+#else // !DIRECT_THREADED
+  if (line_table_len > 0)
+    {
+      start = 0;
+      end = code_length;
+      line_numbers = JvNewIntArray (line_table_len);
+      code_indices = JvNewLongArray (line_table_len);
+
+      jint* lines = elements (line_numbers);
+      jlong* indices = elements (code_indices);
+      for (int i = 0; i < line_table_len; ++i)
+	{
+	  lines[i] = line_table[i].line;
+	  indices[i] = (jlong) line_table[i].bytecode_pc;
+	}
+    }
+#endif // !DIRECT_THREADED
+}
+
 void *
 _Jv_JNIMethod::ncode ()
 {