Fix asserts in StackFrameIterator which were effectively disabled

runtime/vm/debugger.cc

 // Copyright (c) 2012, 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/debugger.h"
 
 #include "include/dart_api.h"
 
 #include "platform/address_sanitizer.h"
 
@@ skipping 1147 matching lines @@
   DebuggerStackTrace* stack = Isolate::Current()->debugger()->StackTrace();
   intptr_t num_frames = stack->Length();
   for (intptr_t i = 0; i < num_frames; i++) {
     ActivationFrame* frame = stack->FrameAt(i);
     OS::PrintErr("#%04" Pd " %s", i, frame->ToCString());
   }
 
   OS::PrintErr(
       "-------------------------\n"
       "All frames...\n\n");
-  StackFrameIterator iterator(false);
+  StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                              Thread::Current(),
+                              StackFrameIterator::kNoCrossThreadIteration);
   StackFrame* frame = iterator.NextFrame();
   intptr_t num = 0;
   while ((frame != NULL)) {
     OS::PrintErr("#%04" Pd " %s\n", num++, frame->ToCString());
     frame = iterator.NextFrame();
   }
 }
 
 
 void ActivationFrame::VariableAt(intptr_t i,
@@ skipping 662 matching lines @@
 
   return dest_frame.raw();
 }
 
 
 DebuggerStackTrace* Debugger::CollectStackTrace() {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
   DebuggerStackTrace* stack_trace = new DebuggerStackTrace(8);
-  StackFrameIterator iterator(false);
+  StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                              Thread::Current(),
+                              StackFrameIterator::kNoCrossThreadIteration);
   Code& code = Code::Handle(zone);
   Code& inlined_code = Code::Handle(zone);
   Array& deopt_frame = Array::Handle(zone);
 
   for (StackFrame* frame = iterator.NextFrame(); frame != NULL;
        frame = iterator.NextFrame()) {
     ASSERT(frame->IsValid());
     if (FLAG_trace_debugger_stacktrace) {
       OS::PrintErr("CollectStackTrace: visiting frame:\n\t%s\n",
                    frame->ToCString());
@@ skipping 65 matching lines @@
     return NULL;
   }
 
   intptr_t synchronous_stack_trace_length =
       StackTraceUtils::CountFrames(thread, 0, async_function);
 
   // Append the top frames from the synchronous stack trace, up until the active
   // asynchronous function. We truncate the remainder of the synchronous
   // stack trace because it contains activations that are part of the
   // asynchronous dispatch mechanisms.
-  StackFrameIterator iterator(false);
+  StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                              Thread::Current(),
+                              StackFrameIterator::kNoCrossThreadIteration);
   StackFrame* frame = iterator.NextFrame();
   while (synchronous_stack_trace_length > 0) {
     ASSERT(frame != NULL);
     if (frame->IsDartFrame()) {
       code = frame->LookupDartCode();
       AppendCodeFrames(thread, isolate, zone, stack_trace, frame, &code,
                        &inlined_code, &deopt_frame);
       synchronous_stack_trace_length--;
     }
     frame = iterator.NextFrame();
@@ skipping 42 matching lines @@
     return NULL;
   }
   // Causal async stacks are not supported in the AOT runtime.
   ASSERT(!FLAG_precompiled_runtime);
 
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
   DebuggerStackTrace* stack_trace = new DebuggerStackTrace(8);
 
-  StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames);
+  StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                              Thread::Current(),
+                              StackFrameIterator::kNoCrossThreadIteration);
 
   Code& code = Code::Handle(zone);
   Smi& offset = Smi::Handle(zone);
   Function& function = Function::Handle(zone);
   Code& inlined_code = Code::Handle(zone);
   Closure& async_activation = Closure::Handle(zone);
   Object& next_async_activation = Object::Handle(zone);
   Array& deopt_frame = Array::Handle(zone);
   class StackTrace& async_stack_trace = StackTrace::Handle(zone);
   bool stack_has_async_function = false;
@@ skipping 113 matching lines @@
     }
     // Follow the link.
     async_stack_trace = async_stack_trace.async_link();
   }
 
   return stack_trace;
 }
 
 
 ActivationFrame* Debugger::TopDartFrame() const {
-  StackFrameIterator iterator(false);
+  StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                              Thread::Current(),
+                              StackFrameIterator::kNoCrossThreadIteration);
   StackFrame* frame = iterator.NextFrame();
   while ((frame != NULL) && !frame->IsDartFrame()) {
     frame = iterator.NextFrame();
   }
   Code& code = Code::Handle(frame->LookupDartCode());
   ActivationFrame* activation = new ActivationFrame(
       frame->pc(), frame->fp(), frame->sp(), code, Object::null_array(), 0);
   return activation;
 }
 
@@ skipping 1192 matching lines @@
     }
     if (FLAG_verbose_debug) {
       OS::Print("HandleSteppingRequest- kStepOut %" Px "\n", stepping_fp_);
     }
   } else if (resume_action_ == kStepRewind) {
     if (FLAG_trace_rewind) {
       OS::PrintErr("Rewinding to frame %" Pd "\n", resume_frame_index_);
       OS::PrintErr(
           "-------------------------\n"
           "All frames...\n\n");
-      StackFrameIterator iterator(false);
+      StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                                  Thread::Current(),
+                                  StackFrameIterator::kNoCrossThreadIteration);
       StackFrame* frame = iterator.NextFrame();
       intptr_t num = 0;
       while ((frame != NULL)) {
         OS::PrintErr("#%04" Pd " %s\n", num++, frame->ToCString());
         frame = iterator.NextFrame();
       }
     }
     RewindToFrame(resume_frame_index_);
     UNREACHABLE();
   }
@@ skipping 101 matching lines @@
 }
 
 
 void Debugger::RewindToFrame(intptr_t frame_index) {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Code& code = Code::Handle(zone);
   Function& function = Function::Handle(zone);
 
   // Find the requested frame.
-  StackFrameIterator iterator(false);
+  StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                              Thread::Current(),
+                              StackFrameIterator::kNoCrossThreadIteration);
   intptr_t current_frame = 0;
   for (StackFrame* frame = iterator.NextFrame(); frame != NULL;
        frame = iterator.NextFrame()) {
     ASSERT(frame->IsValid());
     if (frame->IsDartFrame()) {
       code = frame->LookupDartCode();
       function = code.function();
       if (!IsFunctionVisible(function)) {
         continue;
       }
@@ skipping 81 matching lines @@
 
 
 void Debugger::RewindPostDeopt() {
   intptr_t rewind_frame = post_deopt_frame_index_;
   post_deopt_frame_index_ = -1;
   if (FLAG_trace_rewind) {
     OS::PrintErr("Post deopt, jumping to frame %" Pd "\n", rewind_frame);
     OS::PrintErr(
         "-------------------------\n"
         "All frames...\n\n");
-    StackFrameIterator iterator(false);
+    StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                                Thread::Current(),
+                                StackFrameIterator::kNoCrossThreadIteration);
     StackFrame* frame = iterator.NextFrame();
     intptr_t num = 0;
     while ((frame != NULL)) {
       OS::PrintErr("#%04" Pd " %s\n", num++, frame->ToCString());
       frame = iterator.NextFrame();
     }
   }
 
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Code& code = Code::Handle(zone);
 
-  StackFrameIterator iterator(false);
+  StackFrameIterator iterator(StackFrameIterator::kDontValidateFrames,
+                              Thread::Current(),
+                              StackFrameIterator::kNoCrossThreadIteration);
   intptr_t current_frame = 0;
   for (StackFrame* frame = iterator.NextFrame(); frame != NULL;
        frame = iterator.NextFrame()) {
     ASSERT(frame->IsValid());
     if (frame->IsDartFrame()) {
       code = frame->LookupDartCode();
       ASSERT(!code.is_optimized());
       if (current_frame == rewind_frame) {
         RewindToUnoptimizedFrame(frame, code);
         UNREACHABLE();
@@ skipping 772 matching lines @@
 
 void Debugger::RegisterCodeBreakpoint(CodeBreakpoint* bpt) {
   ASSERT(bpt->next() == NULL);
   bpt->set_next(code_breakpoints_);
   code_breakpoints_ = bpt;
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart