win: Add more memory regions to gathering of PEB

snapshot/win/process_reader_win.h

Index: snapshot/win/process_reader_win.h
diff --git a/snapshot/win/process_reader_win.h b/snapshot/win/process_reader_win.h
index 64181891f5232b4d7d0719abe64029f0fbf4bd5e..636b0ac97fe3d73bad235872b65a21290fbb7784 100644
--- a/snapshot/win/process_reader_win.h
+++ b/snapshot/win/process_reader_win.h
@@ -86,8 +86,26 @@ class ProcessReaderWin {
   //! \return `true` if the target task is a 64-bit process.
   bool Is64Bit() const { return process_info_.Is64Bit(); }
 
+  //! \brief Attempts to read \a num_bytes bytes from the target process
+  //!     starting at address \a at into \a into.
+  //!
+  //! \return `true` if the entire region could be read, or `false` with an
+  //!     error logged.
+  //!
+  //! \sa ReadAvailableMemory
   bool ReadMemory(WinVMAddress at, WinVMSize num_bytes, void* into) const;
 
+  //! \brief Attempts to read \a num_bytes bytes from the target process
+  //!     starting at address \a at into \a into. If some of the specified range
+  //!     is not accessible, reads up to the first inaccessible byte.
+  //!
+  //! \return The actual number of bytes read.
+  //!
+  //! \sa ReadMemory
+  WinVMSize ReadAvailableMemory(WinVMAddress at,
+                                WinVMSize num_bytes,
+                                void* into) const;
+
   //! \brief Determines the target process' start time.
   //!
   //! \param[out] start_time The time that the process started.