win: Gather memory information

util/win/process_info.h

Index: util/win/process_info.h
diff --git a/util/win/process_info.h b/util/win/process_info.h
index ed07ab09f6b8ef27a51c6c456cdd7f40c2a285d1..5af28bd762bddabcc62f2f8be5e7cb88150f7ff0 100644
--- a/util/win/process_info.h
+++ b/util/win/process_info.h
@@ -49,6 +49,40 @@ class ProcessInfo {
     time_t timestamp;
   };
 
+  // \brief Contains information about a range of pages in the virtual address
+  //    space of a process.
+  struct MemoryInfo {
+    explicit MemoryInfo(const MEMORY_BASIC_INFORMATION& mbi);
+    ~MemoryInfo();
+
+    //! \brief The base address of the region of pages.
+    WinVMAddress base_address;
+
+    //! \brief The size of the region beginning at base_address in bytes.
+    WinVMSize region_size;
+
+    //! \brief The base address of a range of pages that was allocated by
+    //!     `VirtualAlloc()`. The page pointed to base_address is within this
+    //!     range of pages.
+    WinVMAddress allocation_base;
+
+    //! \brief The state of the pages, one of `MEM_COMMIT`, `MEM_FREE`, or
+    //!     `MEM_RESERVE`.
+    uint32_t state;
+
+    //! \brief The memory protection option when this page was originally
+    //!     allocated. This will be `PAGE_EXECUTE`, `PAGE_EXECUTE_READ`, etc.
+    uint32_t allocation_protect;
+
+    //! \brief The current memoryprotection state. This will be `PAGE_EXECUTE`,
+    //!   `PAGE_EXECUTE_READ`, etc.
+    uint32_t protect;
+
+    //! \brief The type of the pages. This will be one of `MEM_IMAGE`,
+    //!     `MEM_MAPPED`, or `MEM_PRIVATE`.
+    uint32_t type;
+  };
+
   ProcessInfo();
   ~ProcessInfo();
 
@@ -92,6 +126,9 @@ class ProcessInfo {
   //!     first element.
   bool Modules(std::vector<Module>* modules) const;
 
+  //! \brief Retrieves information about all pages mapped into the process.
+  const std::vector<MemoryInfo>& MemoryInformation() const;
+
  private:
   template <class Traits>
   friend bool GetProcessBasicInformation(HANDLE process,
@@ -104,12 +141,15 @@ class ProcessInfo {
                               WinVMAddress peb_address_vmaddr,
                               ProcessInfo* process_info);
 
+  friend bool ReadMemoryInfo(HANDLE process, ProcessInfo* process_info);
+
   pid_t process_id_;
   pid_t inherited_from_process_id_;
   std::wstring command_line_;
   WinVMAddress peb_address_;
   WinVMSize peb_size_;
   std::vector<Module> modules_;
+  std::vector<MemoryInfo> memory_info_;
   bool is_64_bit_;
   bool is_wow64_;
   InitializationStateDcheck initialized_;