Add MemoryRegionInfo to SB API

Summary:
This adds new SB API calls and classes to allow a user of the SB API to obtain a full list of memory regions accessible within the process. Adding this to the API makes it possible use the API for tasks like scanning memory for blocks allocated with a header and footer to track down memory leaks, otherwise just inspecting every address is impractical especially for 64 bit processes.

These changes only add the API itself and a base implementation of GetMemoryRegions() to lldb_private::Process::GetMemoryRegions.
I will submit separate patches to fill in lldb_private::Process::GetMemoryRegionInfoList and GetMemoryRegionInfo for individual platforms.

The original discussion about this is here:
http://lists.llvm.org/pipermail/lldb-dev/2016-May/010203.html

Reviewers: clayborg

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D20565

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@273547 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 63 insertions, 0 deletions

diff --git a/include/lldb/API/SBMemoryRegionInfoList.h b/include/lldb/API/SBMemoryRegionInfoList.h
new file mode 100644
index 000000000..772382089
--- /dev/null
+++ b/include/lldb/API/SBMemoryRegionInfoList.h
@@ -0,0 +1,63 @@
+//===-- SBMemoryRegionInfoList.h --------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SBMemoryRegionInfoList_h_
+#define LLDB_SBMemoryRegionInfoList_h_
+
+#include "lldb/API/SBDefines.h"
+
+class MemoryRegionInfoListImpl;
+
+namespace lldb {
+
+class LLDB_API SBMemoryRegionInfoList
+{
+public:
+
+    SBMemoryRegionInfoList ();
+
+    SBMemoryRegionInfoList (const lldb::SBMemoryRegionInfoList &rhs);
+
+    const SBMemoryRegionInfoList &
+    operator = (const SBMemoryRegionInfoList &rhs);
+
+    ~SBMemoryRegionInfoList ();
+
+    uint32_t
+    GetSize () const;
+
+    bool
+    GetMemoryRegionAtIndex (uint32_t idx, SBMemoryRegionInfo &region_info);
+
+    void
+    Append (lldb::SBMemoryRegionInfo &region);
+
+    void
+    Append (lldb::SBMemoryRegionInfoList &region_list);
+
+    void
+    Clear ();
+
+protected:
+
+    const MemoryRegionInfoListImpl *
+    operator->() const;
+
+    const MemoryRegionInfoListImpl &
+    operator*() const;
+
+private:
+
+    std::unique_ptr<MemoryRegionInfoListImpl> m_opaque_ap;
+
+};
+
+} // namespace lldb
+
+#endif // LLDB_SBMemoryRegionInfoList_h_