Fix for issue 7757

runtime/vm/stack_frame.cc

Index: runtime/vm/stack_frame.cc
===================================================================
--- runtime/vm/stack_frame.cc	(revision 16999)
+++ runtime/vm/stack_frame.cc	(working copy)
@@ -5,6 +5,7 @@
 #include "vm/stack_frame.h"
 
 #include "vm/assembler_macros.h"
+#include "vm/deopt_instructions.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ -288,4 +289,52 @@
   return &entry_;
 }
 
+
+InlinedFunctionsInDartFrameIterator::InlinedFunctionsInDartFrameIterator(
+    StackFrame* frame) : index_(0),
+                         frame_(frame),
+                         func_(Function::Handle()),
+                         deopt_info_(DeoptInfo::Handle()),
+                         object_table_(Array::Handle()) {
+  ASSERT(frame_ != NULL);
+  const Code& code = Code::Handle(frame_->LookupDartCode());
+  ASSERT(code.is_optimized());
+  func_ = code.function();
+  intptr_t deopt_reason = kDeoptUnknown;
+  deopt_info_ = code.GetDeoptInfoAtPc(frame_->pc(), &deopt_reason);
+  object_table_ = code.object_table();
+}
+
+
+RawFunction* InlinedFunctionsInDartFrameIterator::GetNextFunction(uword* pc) {
+  if (index_ == -1) {
+    return Function::null();
+  }
+  if (deopt_info_.IsNull()) {
+    // We are at a PC that has no deoptimization info so there are no
+    // inlined functions to iterate over, we return the function.
+    index_ = -1;  // No more functions.
+    *pc = frame_->pc();
+    return func_.raw();
+  }
+  // Iterate over the deopt instructions and determine the inlined
+  // functions if any and iterate over them.
+  ASSERT(deopt_info_.Length() != 0);
+  while (index_ < deopt_info_.Length()) {
+    intptr_t cur_index = index_;
+    index_ += 1;
+    intptr_t deopt_instr = deopt_info_.Instruction(cur_index);
+    ASSERT(deopt_instr != DeoptInstr::kRetBeforeAddress);
+    if ((deopt_instr == DeoptInstr::kRetAfterAddress)) {
+      intptr_t deopt_from_index = deopt_info_.FromIndex(cur_index);
+      *pc = DeoptInstr::GetRetAfterAddress(deopt_from_index,
+                                           object_table_,
+                                           &func_);
+      return func_.raw();
+    }
+  }
+  index_ = -1;
+  return Function::null();
+}
+
 }  // namespace dart