Fix problem of excessive attempts to optimize, fix excessive deoptimizations for load/store indexed…

runtime/vm/exceptions.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/exceptions.h"
 
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/flags.h"
 #include "vm/object.h"
 #include "vm/stack_frame.h"
 #include "vm/stub_code.h"
 
 namespace dart {
 
-DEFINE_FLAG(bool, print_stack_trace_at_throw, false,
+DEFINE_FLAG(bool, print_stacktrace_at_throw, false,
     "Prints a stack trace everytime a throw occurs.");
 
 
 const char* Exceptions::kCastExceptionDstName = "type cast";
 
 
 // Iterate through the stack frames and try to find a frame with an
 // exception handler. Once found, set the pc, sp and fp so that execution
 // can continue in that frame.
 static bool FindExceptionHandler(uword* handler_pc,
@@ skipping 119 matching lines @@
   if (stack_frame_pcs.length() > 0) {
     if (existing_stacktrace.IsNull()) {
       stacktrace = Stacktrace::New(stack_frame_pcs);
     } else {
       stacktrace ^= existing_stacktrace.raw();
       stacktrace.Append(stack_frame_pcs);
     }
   } else {
     stacktrace ^= existing_stacktrace.raw();
   }
-  if (FLAG_print_stack_trace_at_throw) {
+  if (FLAG_print_stacktrace_at_throw) {
     OS::Print("Exception '%s' thrown:\n", exception.ToCString());
     OS::Print("%s\n", stacktrace.ToCString());
   }
   if (handler_exists) {
     // Found a dart handler for the exception, jump to it.
     JumpToExceptionHandler(handler_pc,
                            handler_sp,
                            handler_fp,
                            exception,
                            stacktrace);
@@ skipping 110 matching lines @@
   SetField(type_error, cls, "dstType", dst_type_name);
 
   // Initialize field 'dstName'.
   SetField(type_error, cls, "dstName", dst_name);
 
   // Initialize field 'malformedError'.
   SetField(type_error, cls, "malformedError", malformed_error);
 
   // Type errors in the core library may be difficult to diagnose.
   // Print type error information before throwing the error when debugging.
-  if (FLAG_print_stack_trace_at_throw) {
+  if (FLAG_print_stacktrace_at_throw) {
     if (!malformed_error.IsNull()) {
       OS::Print("%s\n", malformed_error.ToCString());
     }
     intptr_t line, column;
     script.GetTokenLocation(location, &line, &column);
     OS::Print("'%s': Failed type check: line %d pos %d: ",
               String::Handle(script.url()).ToCString(), line, column);
     if (!dst_name.IsNull() && (dst_name.Length() > 0)) {
       OS::Print("type '%s' is not a subtype of type '%s' of '%s'.\n",
                 src_type_name.ToCString(),
@@ skipping 119 matching lines @@
     case kIsolateSpawn:
       library = Library::IsolateLibrary();
       class_name = String::NewSymbol("IsolateSpawnException");
       break;
   }
 
   return DartLibraryCalls::ExceptionCreate(library, class_name, arguments);
 }
 
 }  // namespace dart