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third_party/crashpad/crashpad/snapshot/win/process_reader_win.h

Index: third_party/crashpad/crashpad/snapshot/win/process_reader_win.h
diff --git a/third_party/crashpad/crashpad/snapshot/win/process_reader_win.h b/third_party/crashpad/crashpad/snapshot/win/process_reader_win.h
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+// 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,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_SNAPSHOT_WIN_PROCESS_READER_WIN_H_
+#define CRASHPAD_SNAPSHOT_WIN_PROCESS_READER_WIN_H_
+
+#include <sys/time.h>
+#include <windows.h>
+
+#include <vector>
+
+#include "build/build_config.h"
+#include "util/misc/initialization_state_dcheck.h"
+#include "util/win/address_types.h"
+#include "util/win/process_info.h"
+
+namespace crashpad {
+
+//! \brief State of process being read by ProcessReaderWin.
+enum class ProcessSuspensionState : bool {
+  //! \brief The process has not been suspended.
+  kRunning,
+
+  //! \brief The process is suspended.
+  kSuspended,
+};
+
+//! \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() {}
+
+    union {
+      CONTEXT native;
+#if defined(ARCH_CPU_64_BITS)
+      WOW64_CONTEXT wow64;
+#endif
+    } context;
+    uint64_t id;
+    WinVMAddress teb_address;
+    WinVMSize teb_size;
+    WinVMAddress stack_region_address;
+    WinVMSize stack_region_size;
+    uint32_t suspend_count;
+    uint32_t priority_class;
+    uint32_t priority;
+  };
+
+  ProcessReaderWin();
+  ~ProcessReaderWin();
+
+  //! \brief Initializes this object. This method must be called before any
+  //!     other.
+  //!
+  //! \param[in] process Process handle, must have `PROCESS_QUERY_INFORMATION`,
+  //!     `PROCESS_VM_READ`, and `PROCESS_DUP_HANDLE` access.
+  //! \param[in] suspension_state Whether \a process has already been suspended
+  //!     by the caller. Typically, this will be
+  //!     ProcessSuspensionState::kSuspended, except for testing uses and where
+  //!     the reader is reading itself.
+  //!
+  //! \return `true` on success, indicating that this object will respond
+  //!     validly to further method calls. `false` on failure. On failure, no
+  //!     further method calls should be made.
+  //!
+  //! \sa ScopedProcessSuspend
+  bool Initialize(HANDLE process, ProcessSuspensionState suspension_state);
+
+  //! \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.
+  //!
+  //! \return `true` on success, `false` on failure, with a warning logged.
+  bool StartTime(timeval* start_time) const;
+
+  //! \brief Determines the target process' execution time.
+  //!
+  //! \param[out] user_time The amount of time the process has executed code in
+  //!     user mode.
+  //! \param[out] system_time The amount of time the process has executed code
+  //!     in kernel mode.
+  //!
+  //! \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();
+
+  //! \return The modules loaded in the process. The first element (at index
+  //!     `0`) corresponds to the main executable.
+  const std::vector<ProcessInfo::Module>& Modules();
+
+  //! \return A ProcessInfo object for the process being read.
+  const ProcessInfo& GetProcessInfo() const;
+
+ private:
+  template <class Traits>
+  void ReadThreadData(bool is_64_reading_32);
+
+  HANDLE process_;
+  ProcessInfo process_info_;
+  std::vector<Thread> threads_;
+  std::vector<ProcessInfo::Module> modules_;
+  ProcessSuspensionState suspension_state_;
+  bool initialized_threads_;
+  InitializationStateDcheck initialized_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProcessReaderWin);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_SNAPSHOT_WIN_PROCESS_READER_WIN_H_