Fix too strict debug assertion in disassembler.

runtime/vm/disassembler.cc

 // 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.
 
 #include "vm/disassembler.h"
 
 #include "vm/assembler.h"
 #include "vm/deopt_instructions.h"
 #include "vm/globals.h"
 #include "vm/il_printer.h"
@@ skipping 87 matching lines @@
   jsarr_.AddValue(p);
   jsarr_.AddValueNull();
   free(p);
 }
 
 
 void Disassembler::Disassemble(uword start,
                                uword end,
                                DisassemblyFormatter* formatter,
                                const Code& code) {
-  NoSafepointScope no_safepoint;
   const Code::Comments& comments =
       code.IsNull() ? Code::Comments::New(0) : code.comments();
   ASSERT(formatter != NULL);
   char hex_buffer[kHexadecimalBufferSize];  // Instruction in hexadecimal form.
   char human_buffer[kUserReadableBufferSize];  // Human-readable instruction.
   uword pc = start;
   intptr_t comment_finger = 0;
   GrowableArray<Function*> inlined_functions;
   while (pc < end) {
     const intptr_t offset = pc - start;
@@ skipping 42 matching lines @@
                                   pc);
     pc += instruction_length;
   }
 }
 
 
 void Disassembler::DisassembleCodeHelper(
     const char* function_fullname, const Code& code, bool optimized) {
   LocalVarDescriptors& var_descriptors = LocalVarDescriptors::Handle();
   if (FLAG_print_variable_descriptors) {
-    // This flag is not on by default, and for debugging purposes only.
-    // Since this may allocate, do it outside the NoSafepointScope.
     var_descriptors = code.GetLocalVarDescriptors();
   }
-  NoSafepointScope no_safepoint;
   THR_Print("Code for %sfunction '%s' {\n",
             optimized ? "optimized " : "",
             function_fullname);
   code.Disassemble();
   THR_Print("}\n");
 
 #if defined(TARGET_ARCH_IA32)
   THR_Print("Pointer offsets for function: {\n");
   // Pointer offsets are stored in descending order.
   Object& obj = Object::Handle();
@@ skipping 139 matching lines @@
     const Function& function, bool optimized) {
   const char* function_fullname = function.ToFullyQualifiedCString();
   const Code& code = Code::Handle(function.unoptimized_code());
   DisassembleCodeHelper(function_fullname, code, optimized);
 }
 
 
 #endif  // !PRODUCT
 
 }  // namespace dart