Basic GDB JIT Interface integration.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 17 matching lines @@
 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // The original source code covered by the above license above has been
 // modified significantly by Google Inc.
 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 
 #ifndef V8_ASSEMBLER_H_
 #define V8_ASSEMBLER_H_
 
+#include "gdbjit.h"

[Erik Corry, 2011/01/05 09:00:15]

The files should really be called gdb-jit.*

[Vyacheslav Egorov (Chromium), 2011/01/18 16:10:42]

Done.

 #include "runtime.h"
 #include "top.h"
 #include "token.h"
 
 namespace v8 {
 namespace internal {
 
 
 // -----------------------------------------------------------------------------
 // Common double constants.
@@ skipping 577 matching lines @@
   int written_position;
 
   int current_statement_position;
   int written_statement_position;
 };
 
 
 class PositionsRecorder BASE_EMBEDDED {
  public:
   explicit PositionsRecorder(Assembler* assembler)
-      : assembler_(assembler) {}
+      : assembler_(assembler) {
+#ifdef ENABLE_GDBJIT_INTERFACE

[Erik Corry, 2011/01/05 09:00:15]

and the macro should really be called ENABLE_GDB_JIT_INTERFACE.

[Vyacheslav Egorov (Chromium), 2011/01/18 16:10:42]

Done.

+    gdbjit_lineinfo_ = NULL;
+#endif
+  }
+
+#ifdef ENABLE_GDBJIT_INTERFACE
+  ~PositionsRecorder() {
+    delete gdbjit_lineinfo_;
+  }
+
+  void StartGDBJITLineInfoRecording() {
+    if (FLAG_gdbjit) {
+      gdbjit_lineinfo_ = new GDBJITLineInfo();
+    }
+  }
+
+  GDBJITLineInfo* DetachGDBJITLineInfo() {
+    GDBJITLineInfo* lineinfo = gdbjit_lineinfo_;
+    gdbjit_lineinfo_ = NULL;  // To prevent deallocation in destructor.
+    return lineinfo;
+  }
+#endif
 
   // Set current position to pos.
   void RecordPosition(int pos);
 
   // Set current statement position to pos.
   void RecordStatementPosition(int pos);
 
   // Write recorded positions to relocation information.
   bool WriteRecordedPositions();
 
   int current_position() const { return state_.current_position; }
 
   int current_statement_position() const {
     return state_.current_statement_position;
   }
 
  private:
   Assembler* assembler_;
   PositionState state_;
+#ifdef ENABLE_GDBJIT_INTERFACE
+  GDBJITLineInfo* gdbjit_lineinfo_;
+#endif
 
   friend class PreservePositionScope;
 
   DISALLOW_COPY_AND_ASSIGN(PositionsRecorder);
 };
 
 
 class PreservePositionScope BASE_EMBEDDED {
  public:
   explicit PreservePositionScope(PositionsRecorder* positions_recorder)
@@ skipping 49 matching lines @@
   return num_bits_set;
 }
 
 // Computes pow(x, y) with the special cases in the spec for Math.pow.
 double power_double_int(double x, int y);
 double power_double_double(double x, double y);
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_