Add AddressRange to SB API

Summary:
This adds new SB API calls and classes to allow a user of the SB API to
obtain an address range from SBFunction and SBBlock.

Test Plan:
llvm-lit -sv llvm-project/lldb/test/API/python_api/address_range/TestAddressRange.py

Reviewers: clayborg

Subscribers: lldb-commits

Tasks:

Tags:

lldb/bindings/headers.swig

@@ -8,6 +8,8 @@
 %{
 #include "lldb/lldb-public.h"
 #include "lldb/API/SBAddress.h"
+#include "lldb/API/SBAddressRange.h"
+#include "lldb/API/SBAddressRangeList.h"
 #include "lldb/API/SBAttachInfo.h"
 #include "lldb/API/SBBlock.h"
 #include "lldb/API/SBBreakpoint.h"

lldb/bindings/interface/SBAddressRangeDocstrings.i

@@ -0,0 +1,3 @@
+%feature("docstring",
+"API clients can get address range information."
+) lldb::SBAddressRange;

lldb/bindings/interface/SBAddressRangeExtensions.i

@@ -0,0 +1 @@
+STRING_EXTENSION_OUTSIDE(SBAddressRange)

lldb/bindings/interface/SBAddressRangeListDocstrings.i

@@ -0,0 +1,3 @@
+%feature("docstring",
+"Represents a list of :py:class:`SBAddressRange`."
+) lldb::SBAddressRangeList;

lldb/bindings/interface/SBAddressRangeListExtensions.i

@@ -0,0 +1,25 @@
+STRING_EXTENSION_OUTSIDE(SBAddressRangeList)
+
+%extend lldb::SBAddressRangeList {
+#ifdef SWIGPYTHON
+    %pythoncode%{
+    def __len__(self):
+      '''Return the number of address ranges in a lldb.SBAddressRangeList object.'''
+      return self.GetSize()
+
+    def __iter__(self):
+      '''Iterate over all the address ranges in a lldb.SBAddressRangeList object.'''
+      return lldb_iter(self, 'GetSize', 'GetAddressRangeAtIndex')
+
+    def __getitem__(self, idx):
+      '''Get the address range at a given index in an lldb.SBAddressRangeList object.'''
+      if type(idx) == int:
+        if idx >= self.GetSize():
+          raise IndexError("list index out of range")
+        return self.GetAddressRangeAtIndex(idx)
+      else:
+        print("error: unsupported idx type: %s" % type(key))
+        return None
+    %}
+#endif
+}

lldb/bindings/interfaces.swig

@@ -12,6 +12,8 @@
 
 /* Docstrings for SB classes and methods */
 %include "./interface/SBAddressDocstrings.i"
+%include "./interface/SBAddressRangeDocstrings.i"
+%include "./interface/SBAddressRangeListDocstrings.i"
 %include "./interface/SBAttachInfoDocstrings.i"
 %include "./interface/SBBlockDocstrings.i"
 %include "./interface/SBBreakpointDocstrings.i"
@@ -86,6 +88,8 @@
 
 /* API headers */
 %include "lldb/API/SBAddress.h"
+%include "lldb/API/SBAddressRange.h"
+%include "lldb/API/SBAddressRangeList.h"
 %include "lldb/API/SBAttachInfo.h"
 %include "lldb/API/SBBlock.h"
 %include "lldb/API/SBBreakpoint.h"
@@ -162,6 +166,8 @@
 
 /* Extensions for SB classes */
 %include "./interface/SBAddressExtensions.i"
+%include "./interface/SBAddressRangeExtensions.i"
+%include "./interface/SBAddressRangeListExtensions.i"
 %include "./interface/SBBlockExtensions.i"
 %include "./interface/SBBreakpointExtensions.i"
 %include "./interface/SBBreakpointListExtensions.i"

lldb/include/lldb/API/LLDB.h

@@ -10,6 +10,8 @@
 #define LLDB_API_LLDB_H
 
 #include "lldb/API/SBAddress.h"
+#include "lldb/API/SBAddressRange.h"
+#include "lldb/API/SBAddressRangeList.h"
 #include "lldb/API/SBAttachInfo.h"
 #include "lldb/API/SBBlock.h"
 #include "lldb/API/SBBreakpoint.h"

lldb/include/lldb/API/SBAddress.h

@@ -86,6 +86,7 @@ class LLDB_API SBAddress {
   lldb::SBLineEntry GetLineEntry();
 
 protected:
+  friend class SBAddressRange;
   friend class SBBlock;
   friend class SBBreakpoint;
   friend class SBBreakpointLocation;

lldb/include/lldb/API/SBAddressRange.h

@@ -0,0 +1,65 @@
+//===-- SBAddressRange.h ----------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_API_SBADDRESSRANGE_H
+#define LLDB_API_SBADDRESSRANGE_H
+
+#include "lldb/API/SBDefines.h"
+
+namespace lldb {
+
+class LLDB_API SBAddressRange {
+public:
+  SBAddressRange();
+
+  SBAddressRange(const lldb::SBAddressRange &rhs);
+
+  SBAddressRange(lldb::SBAddress addr, lldb::addr_t byte_size);
+
+  ~SBAddressRange();
+
+  const lldb::SBAddressRange &operator=(const lldb::SBAddressRange &rhs);
+
+  void Clear();
+
+  /// Check the address range refers to a valid base address and has a byte
+  /// size greater than zero.
+  ///
+  /// \return
+  ///     True if the address range is valid, false otherwise.
+  bool IsValid() const;
+
+  /// Get the base address of the range.
+  ///
+  /// \return
+  ///     Base address object.
+  lldb::SBAddress GetBaseAddress() const;
+
+  /// Get the byte size of this range.
+  ///
+  /// \return
+  ///     The size in bytes of this address range.
+  lldb::addr_t GetByteSize() const;
+
+  bool operator==(const SBAddressRange &rhs);
+
+  bool operator!=(const SBAddressRange &rhs);
+
+  bool GetDescription(lldb::SBStream &description);
+
+private:
+  friend class SBAddressRangeList;
+  friend class SBBlock;
+  friend class SBFunction;
+
+  AddressRangeUP m_opaque_up;
+};
+
+} // namespace lldb
+
+#endif // LLDB_API_SBADDRESSRANGE_H

lldb/include/lldb/API/SBAddressRangeList.h

@@ -0,0 +1,58 @@
+//===-- SBAddressRangeList.h ------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_API_SBADDRESSRANGELIST_H
+#define LLDB_API_SBADDRESSRANGELIST_H
+
+#include <memory>
+
+#include "lldb/API/SBDefines.h"
+
+class AddressRangeListImpl;
+
+namespace lldb {
+
+class LLDB_API SBAddressRangeList {
+public:
+  SBAddressRangeList();
+
+  SBAddressRangeList(const lldb::SBAddressRangeList &rhs);
+
+  ~SBAddressRangeList();
+
+  const lldb::SBAddressRangeList &
+  operator=(const lldb::SBAddressRangeList &rhs);
+
+  uint32_t GetSize() const;
+
+  void Clear();
+
+  SBAddressRange GetAddressRangeAtIndex(uint64_t idx);
+
+  void Append(const lldb::SBAddressRange &addr_range);
+
+  void Append(const lldb::SBAddressRangeList &addr_range_list);
+
+  bool GetDescription(lldb::SBStream &description);
+
+private:
+  const AddressRangeListImpl *operator->() const;
+
+  const AddressRangeListImpl &operator*() const;
+
+  friend class SBBlock;
+  friend class SBProcess;
+
+  lldb_private::AddressRanges &ref() const;
+
+  std::unique_ptr<AddressRangeListImpl> m_opaque_up;
+};
+
+} // namespace lldb
+
+#endif // LLDB_API_SBADDRESSRANGELIST_H

lldb/include/lldb/API/SBBlock.h

@@ -9,6 +9,8 @@
 #ifndef LLDB_API_SBBLOCK_H
 #define LLDB_API_SBBLOCK_H
 
+#include "lldb/API/SBAddressRange.h"
+#include "lldb/API/SBAddressRangeList.h"
 #include "lldb/API/SBDefines.h"
 #include "lldb/API/SBFrame.h"
 #include "lldb/API/SBTarget.h"
@@ -52,6 +54,8 @@ class LLDB_API SBBlock {
 
   lldb::SBAddress GetRangeEndAddress(uint32_t idx);
 
+  lldb::SBAddressRangeList GetRanges();
+
   uint32_t GetRangeIndexForBlockAddress(lldb::SBAddress block_addr);
 
   lldb::SBValueList GetVariables(lldb::SBFrame &frame, bool arguments,

lldb/include/lldb/API/SBDefines.h

@@ -43,6 +43,8 @@
 namespace lldb {
 
 class LLDB_API SBAddress;
+class LLDB_API SBAddressRange;
+class LLDB_API SBAddressRangeList;
 class LLDB_API SBAttachInfo;
 class LLDB_API SBBlock;
 class LLDB_API SBBreakpoint;

lldb/include/lldb/API/SBFunction.h

@@ -10,6 +10,7 @@
 #define LLDB_API_SBFUNCTION_H
 
 #include "lldb/API/SBAddress.h"
+#include "lldb/API/SBAddressRange.h"
 #include "lldb/API/SBDefines.h"
 #include "lldb/API/SBInstructionList.h"
 
@@ -44,6 +45,8 @@ class LLDB_API SBFunction {
 
   lldb::SBAddress GetEndAddress();
 
+  lldb::SBAddressRange GetRange();
+
   const char *GetArgumentName(uint32_t arg_idx);
 
   uint32_t GetPrologueByteSize();

lldb/include/lldb/API/SBStream.h

@@ -62,6 +62,8 @@ class LLDB_API SBStream {
 
 protected:
   friend class SBAddress;
+  friend class SBAddressRange;
+  friend class SBAddressRangeList;
   friend class SBBlock;
   friend class SBBreakpoint;
   friend class SBBreakpointLocation;

lldb/include/lldb/Core/AddressRange.h

@@ -86,6 +86,8 @@ class AddressRange {
   /// (LLDB_INVALID_ADDRESS) and a zero byte size.
   void Clear();
 
+  bool IsValid() const;
+
   /// Check if a section offset address is contained in this range.
   ///
   /// \param[in] so_addr
@@ -236,12 +238,22 @@ class AddressRange {
   ///     The new size in bytes of this address range.
   void SetByteSize(lldb::addr_t byte_size) { m_byte_size = byte_size; }
 
+  bool operator==(const AddressRange &rhs);
+
+  bool operator!=(const AddressRange &rhs);
+
 protected:
   // Member variables
   Address m_base_addr;      ///< The section offset base address of this range.
   lldb::addr_t m_byte_size = 0; ///< The size in bytes of this address range.
 };
 
+// Forward-declarable wrapper.
+class AddressRanges : public std::vector<lldb_private::AddressRange> {
+public:
+  using std::vector<lldb_private::AddressRange>::vector;
+};
+
 } // namespace lldb_private
 
 #endif // LLDB_CORE_ADDRESSRANGE_H

lldb/include/lldb/Symbol/Block.h

@@ -355,6 +355,8 @@ class Block : public UserID, public SymbolContextScope {
   // be able to get at any of the address ranges in a block.
   bool GetRangeAtIndex(uint32_t range_idx, AddressRange &range);
 
+  AddressRanges GetRanges();
+
   bool GetStartAddress(Address &addr);
 
   void SetDidParseVariables(bool b, bool set_children);

lldb/include/lldb/lldb-forward.h

@@ -19,6 +19,8 @@ class ASTResultSynthesizer;
 class ASTStructExtractor;
 class Address;
 class AddressRange;
+class AddressRanges;
+class AddressRangeList;
 class AddressResolver;
 class ArchSpec;
 class Architecture;
@@ -308,6 +310,7 @@ template <unsigned N> class StreamBuffer;
 namespace lldb {
 
 typedef std::shared_ptr<lldb_private::ABI> ABISP;
+typedef std::unique_ptr<lldb_private::AddressRange> AddressRangeUP;
 typedef std::shared_ptr<lldb_private::Baton> BatonSP;
 typedef std::shared_ptr<lldb_private::Block> BlockSP;
 typedef std::shared_ptr<lldb_private::Breakpoint> BreakpointSP;

lldb/source/API/CMakeLists.txt

@@ -41,6 +41,8 @@ add_custom_target(lldb-sbapi-dwarf-enums
 
 add_lldb_library(liblldb SHARED ${option_framework}
   SBAddress.cpp
+  SBAddressRange.cpp
+  SBAddressRangeList.cpp
   SBAttachInfo.cpp
   SBBlock.cpp
   SBBreakpoint.cpp