Add MinidumpThreadListWriter::InitializeFromSnapshot()

snapshot/thread_snapshot.h

 // Copyright 2014 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 18 matching lines @@
   virtual ~ThreadSnapshot() {}
 
   //! \brief Returns a CPUContext object corresponding to the thread’s CPU
   //!     context.
   //!
   //! The caller does not take ownership of this object, it is scoped to the
   //! lifetime of the ThreadSnapshot object that it was obtained from.
   virtual const CPUContext* Context() const = 0;
 
   //! \brief Returns a MemorySnapshot object corresponding to the memory region
-  //!     that contains the thread’s stack.
+  //!     that contains the thread’s stack, or `nullptr` if no stack region is
+  //!     available.
   //!
   //! The caller does not take ownership of this object, it is scoped to the
   //! lifetime of the ThreadSnapshot object that it was obtained from.
   virtual const MemorySnapshot* Stack() const = 0;
 
   //! \brief Returns the thread’s identifier.
   //!
   //! Thread identifiers are at least unique within a process, and may be unique
   //! system-wide.
   virtual uint64_t ThreadID() const = 0;
 
   //! \brief Returns the thread’s suspend count.
   //!
   //! A suspend count of `0` denotes a schedulable (not suspended) thread.
   virtual int SuspendCount() const = 0;
 
   //! \brief Returns the thread’s priority.
   //!
   //! Threads with higher priorities will have higher priority values.
   virtual int Priority() const = 0;
 
   //! \brief Returns the base address of a region used to store thread-specific
   //!     data.
   virtual uint64_t ThreadSpecificDataAddress() const = 0;
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_SNAPSHOT_THREAD_SNAPSHOT_H_