win: Add more memory regions to gathering of PEB

snapshot/win/process_reader_win.cc

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 213 matching lines @@
                          base::checked_cast<SIZE_T>(num_bytes),
                          &bytes_read) ||
       num_bytes != bytes_read) {
     PLOG(ERROR) << "ReadMemory at 0x" << std::hex << at << std::dec << " of "
                 << num_bytes << " bytes failed";
     return false;
   }
   return true;
 }
 
+WinVMSize ProcessReaderWin::ReadAvailableMemory(WinVMAddress at,
+                                                WinVMSize num_bytes,
+                                                void* into) const {
+  auto ranges = GetAccessibleRangesInMemoryMap(
+      at, num_bytes, process_info_.MemoryInformation());
+  // We only read up until the first unavailable block, so we only read from the
+  // first range.
+  if (ranges.empty())
+    return 0;
+  if (!ReadMemory(ranges.front().base(), ranges.front().size(), into))
+    return 0;
+  return ranges.front().size();
+}
+
 bool ProcessReaderWin::StartTime(timeval* start_time) const {
   FILETIME creation, exit, kernel, user;
   if (!GetProcessTimes(process_, &creation, &exit, &kernel, &user)) {
     PLOG(ERROR) << "GetProcessTimes";
     return false;
   }
   *start_time = FiletimeToTimevalEpoch(creation);
   return true;
 }
 
@@ skipping 126 matching lines @@
         thread.stack_region_size = 0;
       } else {
         thread.stack_region_size = base - limit;
       }
     }
     threads_.push_back(thread);
   }
 }
 
 }  // namespace crashpad