[lldb] Fix SBAddressRange validation checks. (#95997)

Author: mbucko

lldb/include/lldb/API/SBAddressRange.h

@@ -11,6 +11,10 @@
 
 #include "lldb/API/SBDefines.h"
 
+namespace lldb_private {
+class AddressRange;
+}
+
 namespace lldb {
 
 class LLDB_API SBAddressRange {
@@ -58,6 +62,8 @@ class LLDB_API SBAddressRange {
   friend class SBFunction;
   friend class SBProcess;
 
+  lldb_private::AddressRange &ref() const;
+
   AddressRangeUP m_opaque_up;
 };
 

lldb/include/lldb/API/SBAddressRangeList.h

@@ -46,6 +46,8 @@ class LLDB_API SBAddressRangeList {
   friend class SBBlock;
   friend class SBProcess;
 
+  lldb_private::AddressRangeListImpl &ref() const;
+
   std::unique_ptr<lldb_private::AddressRangeListImpl> m_opaque_up;
 };
 

lldb/source/API/SBAddressRange.cpp

@@ -50,9 +50,7 @@ const SBAddressRange &SBAddressRange::operator=(const SBAddressRange &rhs) {
 bool SBAddressRange::operator==(const SBAddressRange &rhs) {
   LLDB_INSTRUMENT_VA(this, rhs);
 
-  if (!IsValid() || !rhs.IsValid())
-    return false;
-  return m_opaque_up->operator==(*(rhs.m_opaque_up));
+  return ref().operator==(rhs.ref());
 }
 
 bool SBAddressRange::operator!=(const SBAddressRange &rhs) {
@@ -64,40 +62,35 @@ bool SBAddressRange::operator!=(const SBAddressRange &rhs) {
 void SBAddressRange::Clear() {
   LLDB_INSTRUMENT_VA(this);
 
-  m_opaque_up.reset();
+  ref().Clear();
 }
 
 bool SBAddressRange::IsValid() const {
   LLDB_INSTRUMENT_VA(this);
 
-  return m_opaque_up && m_opaque_up->IsValid();
+  return ref().IsValid();
 }
 
 lldb::SBAddress SBAddressRange::GetBaseAddress() const {
   LLDB_INSTRUMENT_VA(this);
 
-  if (!IsValid())
-    return lldb::SBAddress();
-  return lldb::SBAddress(m_opaque_up->GetBaseAddress());
+  return lldb::SBAddress(ref().GetBaseAddress());
 }
 
 lldb::addr_t SBAddressRange::GetByteSize() const {
   LLDB_INSTRUMENT_VA(this);
 
-  if (!IsValid())
-    return 0;
-  return m_opaque_up->GetByteSize();
+  return ref().GetByteSize();
 }
 
 bool SBAddressRange::GetDescription(SBStream &description,
                                     const SBTarget target) {
   LLDB_INSTRUMENT_VA(this, description, target);
 
-  Stream &stream = description.ref();
-  if (!IsValid()) {
-    stream << "<invalid>";
-    return true;
-  }
-  m_opaque_up->GetDescription(&stream, target.GetSP().get());
-  return true;
+  return ref().GetDescription(&description.ref(), target.GetSP().get());
+}
+
+lldb_private::AddressRange &SBAddressRange::ref() const {
+  assert(m_opaque_up && "opaque pointer must always be valid");
+  return *m_opaque_up;
 }

lldb/source/API/SBAddressRangeList.cpp

@@ -37,40 +37,40 @@ SBAddressRangeList::operator=(const SBAddressRangeList &rhs) {
   LLDB_INSTRUMENT_VA(this, rhs);
 
   if (this != &rhs)
-    *m_opaque_up = *rhs.m_opaque_up;
+    ref() = rhs.ref();
   return *this;
 }
 
 uint32_t SBAddressRangeList::GetSize() const {
   LLDB_INSTRUMENT_VA(this);
 
-  return m_opaque_up->GetSize();
+  return ref().GetSize();
 }
 
 SBAddressRange SBAddressRangeList::GetAddressRangeAtIndex(uint64_t idx) {
   LLDB_INSTRUMENT_VA(this, idx);
 
   SBAddressRange sb_addr_range;
-  (*sb_addr_range.m_opaque_up) = m_opaque_up->GetAddressRangeAtIndex(idx);
+  (*sb_addr_range.m_opaque_up) = ref().GetAddressRangeAtIndex(idx);
   return sb_addr_range;
 }
 
 void SBAddressRangeList::Clear() {
   LLDB_INSTRUMENT_VA(this);
 
-  m_opaque_up->Clear();
+  ref().Clear();
 }
 
 void SBAddressRangeList::Append(const SBAddressRange &sb_addr_range) {
   LLDB_INSTRUMENT_VA(this, sb_addr_range);
 
-  m_opaque_up->Append(*sb_addr_range.m_opaque_up);
+  ref().Append(*sb_addr_range.m_opaque_up);
 }
 
 void SBAddressRangeList::Append(const SBAddressRangeList &sb_addr_range_list) {
   LLDB_INSTRUMENT_VA(this, sb_addr_range_list);
 
-  m_opaque_up->Append(*sb_addr_range_list.m_opaque_up);
+  ref().Append(*sb_addr_range_list.m_opaque_up);
 }
 
 bool SBAddressRangeList::GetDescription(SBStream &description,
@@ -92,3 +92,8 @@ bool SBAddressRangeList::GetDescription(SBStream &description,
   stream << "]";
   return true;
 }
+
+lldb_private::AddressRangeListImpl &SBAddressRangeList::ref() const {
+  assert(m_opaque_up && "opaque pointer must always be valid");
+  return *m_opaque_up;
+}

lldb/test/API/python_api/address_range/TestAddressRange.py

@@ -166,7 +166,7 @@ def test_address_range_list_iterator(self):
     def test_address_range_print_invalid(self):
         """Make sure the SBAddressRange can be printed when invalid."""
         range = lldb.SBAddressRange()
-        self.assertEqual(str(range), "<invalid>")
+        self.assertEqual(str(range), "[0xffffffffffffffff-0xffffffffffffffff)")
 
     def test_address_range_print_resolved(self):
         """Make sure the SBAddressRange can be printed when resolved."""