Support stacktrace and objecthistogram service commands

runtime/vm/disassembler.h

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_DISASSEMBLER_H_
 #define VM_DISASSEMBLER_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/globals.h"
 
 namespace dart {
 
 // Froward declaration.
 class MemoryRegion;
+class JSONStream;
 
 // Disassembly formatter interface, which consumes the
 // disassembled instructions in any desired form.
 class DisassemblyFormatter {
  public:
   DisassemblyFormatter() { }
   virtual ~DisassemblyFormatter() { }
 
   // Consume the decoded instruction at the given pc.
   virtual void ConsumeInstruction(char* hex_buffer,
@@ skipping 21 matching lines @@
                                   uword pc);
 
   virtual void Print(const char* format, ...) PRINTF_ATTRIBUTE(2, 3);
 
  private:
   DISALLOW_ALLOCATION()
   DISALLOW_COPY_AND_ASSIGN(DisassembleToStdout);
 };
 
 
+// Disassemble into a JSONStream.
+class DisassembleToJSONStream : public DisassemblyFormatter {
+ public:
+  explicit DisassembleToJSONStream(JSONStream* stream) : DisassemblyFormatter(),
+      stream_(stream) { }
+  ~DisassembleToJSONStream() { }
+
+  virtual void ConsumeInstruction(char* hex_buffer,
+                                  intptr_t hex_size,
+                                  char* human_buffer,
+                                  intptr_t human_size,
+                                  uword pc);
+
+  virtual void Print(const char* format, ...) PRINTF_ATTRIBUTE(2, 3);
+
+ private:
+  JSONStream* stream_;
+  DISALLOW_ALLOCATION();
+  DISALLOW_COPY_AND_ASSIGN(DisassembleToJSONStream);
+};
+
+
 // Disassemble instructions.
 class Disassembler : public AllStatic {
  public:
   // Disassemble instructions between start and end.
   // (The assumption is that start is at a valid instruction).
   // Return true if all instructions were successfully decoded, false otherwise.
   static void Disassemble(uword start,
                           uword end,
                           DisassemblyFormatter* formatter,
                           const Code::Comments& comments);
@@ skipping 39 matching lines @@
                                 int* out_instr_len, uword pc);
 
  private:
   static const int kHexadecimalBufferSize = 32;
   static const int kUserReadableBufferSize = 256;
 };
 
 }  // namespace dart
 
 #endif  // VM_DISASSEMBLER_H_