win: Add thread snapshot and memory snapshot for stacks

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 ff687885b5483ec2126d451481ca867928c4e4f1..19b65853771a8fb9baba5c75be2d50a2e2ff70fa 100644
--- a/snapshot/win/process_reader_win.h
+++ b/snapshot/win/process_reader_win.h
@@ -27,6 +27,20 @@ namespace crashpad {
 //! \brief Accesses information about another process, identified by a HANDLE.
 class ProcessReaderWin {
  public:
+  //! \brief Contains information about a thread that belongs to a process.
+  struct Thread {
+    Thread();
+    ~Thread() {}
+
+    uint64_t id;
+    uint32_t suspend_count;
+    uint32_t priority_class;
+    uint32_t priority;
+    WinVMAddress teb;

[Mark Mentovai, 2015/05/08 16:54:20]

Reorder this for better packing: put the uint32s at the end.

[scottmg, 2015/05/08 18:24:02]

Done.

+    WinVMAddress stack_region_address;
+    WinVMSize stack_region_size;
+  };
+
   ProcessReaderWin();
   ~ProcessReaderWin();
 
@@ -66,13 +80,21 @@ class ProcessReaderWin {
   //! \return `true` on success, `false` on failure, with a warning logged.
   bool CPUTimes(timeval* user_time, timeval* system_time) const;
 
+  //! \return The threads that are in the process. The first element (at index
+  //!     `0`) corresponds to the main thread.
+  const std::vector<Thread>& Threads();

[Mark Mentovai, 2015/05/08 16:54:20]

#include <vector>

[scottmg, 2015/05/08 18:24:02]

Done.

+
   //! \return The modules loaded in the process. The first element (at index
   //!     `0`) corresponds to the main executable.
   const std::vector<ProcessInfo::Module>& Modules();
 
  private:
+  //! Initializes the threads_ vector on behalf of Initialize().

[Mark Mentovai, 2015/05/08 16:54:20]

This should be // or //! \brief. (But note that although sometimes we do have
Doxygen documentation for private things, it’s not configured to generate output
for them.)

[scottmg, 2015/05/08 18:24:02]

Done. Then removed.

+  void InitializeThreads();
+
   HANDLE process_;
   ProcessInfo process_info_;
+  std::vector<Thread> threads_;
   std::vector<ProcessInfo::Module> modules_;
   InitializationStateDcheck initialized_;