Initial SIMDBC interpreter.

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 "vm/code_generator.h"
 #include "vm/code_patcher.h"
@@ skipping 213 matching lines @@
   if (bpt_location_->IsResolved()) {
     jsobj.AddLocation(bpt_location_);
   } else {
     jsobj.AddUnresolvedLocation(bpt_location_);
   }
 }
 
 
 void CodeBreakpoint::VisitObjectPointers(ObjectPointerVisitor* visitor) {
   visitor->VisitPointer(reinterpret_cast<RawObject**>(&code_));
+#if !defined(TARGET_ARCH_DBC)
   visitor->VisitPointer(reinterpret_cast<RawObject**>(&saved_value_));
+#endif
 }
 
 
 ActivationFrame::ActivationFrame(
     uword pc,
     uword fp,
     uword sp,
     const Code& code,
     const Array& deopt_frame,
     intptr_t deopt_frame_offset)
@@ skipping 607 matching lines @@
   vars_initialized_ = true;
 }
 
 
 intptr_t ActivationFrame::NumLocalVariables() {
   GetDescIndices();
   return desc_indices_.length();
 }
 
 
+DART_FORCE_INLINE static RawObject* GetVariableValue(uword addr) {
+  return *reinterpret_cast<RawObject**>(addr);
+}
+
+
 RawObject* ActivationFrame::GetParameter(intptr_t index) {
   intptr_t num_parameters = function().num_fixed_parameters();
   ASSERT(0 <= index && index < num_parameters);
-  intptr_t reverse_index = num_parameters - index;
 
   if (function().NumOptionalParameters() > 0) {
     // If the function has optional parameters, the first positional parameter
     // can be in a number of places in the caller's frame depending on how many
     // were actually supplied at the call site, but they are copied to a fixed
     // place in the callee's frame.
-    uword var_address = fp() + ((kFirstLocalSlotFromFp - index) * kWordSize);
-    return reinterpret_cast<RawObject*>(
-        *reinterpret_cast<uword*>(var_address));
+    return GetVariableValue(LocalVarAddress(fp(), -(index + 1)));
   } else {
-    uword var_address = fp() + (kParamEndSlotFromFp * kWordSize)
-                             + (reverse_index * kWordSize);
-    return reinterpret_cast<RawObject*>(
-        *reinterpret_cast<uword*>(var_address));
+    intptr_t reverse_index = num_parameters - index;
+    return GetVariableValue(ParamAddress(fp(), reverse_index));
   }
 }
 
 
 RawObject* ActivationFrame::GetClosure() {
   ASSERT(function().IsClosureFunction());
   return GetParameter(0);
 }
 
 
 RawObject* ActivationFrame::GetStackVar(intptr_t slot_index) {
   if (deopt_frame_.IsNull()) {
-    uword var_address = fp() + slot_index * kWordSize;
-    return reinterpret_cast<RawObject*>(
-        *reinterpret_cast<uword*>(var_address));
+    return GetVariableValue(LocalVarAddress(fp(), slot_index));
   } else {
     return deopt_frame_.At(deopt_frame_offset_ + slot_index);
   }
 }
 
 
 void ActivationFrame::PrintContextMismatchError(
     intptr_t ctx_slot,
     intptr_t frame_ctx_level,
     intptr_t var_ctx_level) {
@@ skipping 257 matching lines @@
                                uword pc,
                                RawPcDescriptors::Kind kind)
     : code_(code.raw()),
       token_pos_(token_pos),
       pc_(pc),
       line_number_(-1),
       is_enabled_(false),
       bpt_location_(NULL),
       next_(NULL),
       breakpoint_kind_(kind),
-      saved_value_(Code::null()) {
+#if !defined(TARGET_ARCH_DBC)
+      saved_value_(Code::null())
+#else
+      saved_value_(Bytecode::kTrap)
+#endif
+    {
   ASSERT(!code.IsNull());
   ASSERT(token_pos_.IsReal());
   ASSERT(pc_ != 0);
   ASSERT((breakpoint_kind_ & kSafepointKind) != 0);
 }
 
 
 CodeBreakpoint::~CodeBreakpoint() {
   // Make sure we don't leave patched code behind.
   ASSERT(!IsEnabled());
@@ skipping 1500 matching lines @@
   // interested in. If we saved the frame pointer of a stack frame
   // the user is interested in, we ignore the single step if we are
   // in a callee of that frame. Note that we assume that the stack
   // grows towards lower addresses.
   ActivationFrame* frame = TopDartFrame();
   ASSERT(frame != NULL);
 
   if (stepping_fp_ != 0) {
     // There is an "interesting frame" set. Only pause at appropriate
     // locations in this frame.
-    if (stepping_fp_ > frame->fp()) {
+    if (IsCalleeFrameOf(stepping_fp_, frame->fp())) {
       // We are i n a callee of the frame we're interested in.
       // Ignore this stepping break.
       return Error::null();
-    } else if (frame->fp() > stepping_fp_) {
+    } else if (IsCalleeFrameOf(frame->fp(), stepping_fp_)) {
       // We returned from the "interesting frame", there can be no more
       // stepping breaks for it. Pause at the next appropriate location
       // and let the user set the "interesting" frame again.
       stepping_fp_ = 0;
     }
   }
 
   if (!frame->IsDebuggable()) {
     return Error::null();
   }
@@ skipping 636 matching lines @@
 
 void Debugger::RegisterCodeBreakpoint(CodeBreakpoint* bpt) {
   ASSERT(bpt->next() == NULL);
   bpt->set_next(code_breakpoints_);
   code_breakpoints_ = bpt;
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart