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third_party/crashpad/crashpad/util/win/process_info.h

Index: third_party/crashpad/crashpad/util/win/process_info.h
diff --git a/third_party/crashpad/crashpad/util/win/process_info.h b/third_party/crashpad/crashpad/util/win/process_info.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_UTIL_WIN_PROCESS_INFO_H_
+#define CRASHPAD_UTIL_WIN_PROCESS_INFO_H_
+
+#include <sys/types.h>
+#include <windows.h>
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "util/misc/initialization_state_dcheck.h"
+#include "util/numeric/checked_range.h"
+#include "util/win/address_types.h"
+
+namespace crashpad {
+
+//! \brief Gathers information about a process given its `HANDLE`. This consists
+//!     primarily of information stored in the Process Environment Block.
+class ProcessInfo {
+ public:
+  //! \brief Contains information about a module loaded into a process.
+  struct Module {
+    Module();
+    ~Module();
+
+    //! \brief The pathname used to load the module from disk.
+    std::wstring name;
+
+    //! \brief The base address of the loaded DLL.
+    WinVMAddress dll_base;
+
+    //! \brief The size of the module.
+    WinVMSize size;
+
+    //! \brief The module's timestamp.
+    time_t timestamp;
+  };
+
+  struct Handle {
+    Handle();
+    ~Handle();
+
+    //! \brief A string representation of the handle's type.
+    std::wstring type_name;
+
+    //! \brief The handle's value.
+    int handle;
+
+    //! \brief The attributes for the handle, e.g. `OBJ_INHERIT`,
+    //!     `OBJ_CASE_INSENSITIVE`, etc.
+    uint32_t attributes;
+
+    //! \brief The `ACCESS_MASK` for the handle in this process.
+    //!
+    //! See
+    //! http://blogs.msdn.com/b/openspecification/archive/2010/04/01/about-the-access-mask-structure.aspx
+    //! for more information.
+    uint32_t granted_access;
+
+    //! \brief The number of kernel references to the object that this handle
+    //!     refers to.
+    uint32_t pointer_count;
+
+    //! \brief The number of open handles to the object that this handle refers
+    //!     to.
+    uint32_t handle_count;
+  };
+
+  ProcessInfo();
+  ~ProcessInfo();
+
+  //! \brief Initializes this object with information about the given
+  //!     \a process.
+  //!
+  //! This method must be called successfully prior to calling any other
+  //! method in this class. This method may only be called once.
+  //!
+  //! \return `true` on success, `false` on failure with a message logged.
+  bool Initialize(HANDLE process);
+
+  //! \return `true` if the target process is a 64-bit process.
+  bool Is64Bit() const;
+
+  //! \return `true` if the target process is running on the Win32-on-Win64
+  //!     subsystem.
+  bool IsWow64() const;
+
+  //! \return The target process's process ID.
+  pid_t ProcessID() const;
+
+  //! \return The target process's parent process ID.
+  pid_t ParentProcessID() const;
+
+  //! \return The command line from the target process's Process Environment
+  //!     Block.
+  bool CommandLine(std::wstring* command_line) const;
+
+  //! \brief Gets the address and size of the process's Process Environment
+  //!     Block.
+  //!
+  //! \param[out] peb_address The address of the Process Environment Block.
+  //! \param[out] peb_size The size of the Process Environment Block.
+  void Peb(WinVMAddress* peb_address, WinVMSize* peb_size) const;
+
+  //! \brief Retrieves the modules loaded into the target process.
+  //!
+  //! The modules are enumerated in initialization order as detailed in the
+  //!     Process Environment Block. The main executable will always be the
+  //!     first element.
+  bool Modules(std::vector<Module>* modules) const;
+
+  //! \brief Retrieves information about all pages mapped into the process.
+  const std::vector<MEMORY_BASIC_INFORMATION64>& MemoryInfo() const;
+
+  //! \brief Given a range to be read from the target process, returns a vector
+  //!     of ranges, representing the readable portions of the original range.
+  //!
+  //! \param[in] range The range being identified.
+  //!
+  //! \return A vector of ranges corresponding to the portion of \a range that
+  //!     is readable based on the memory map.
+  std::vector<CheckedRange<WinVMAddress, WinVMSize>> GetReadableRanges(
+      const CheckedRange<WinVMAddress, WinVMSize>& range) const;
+
+  //! \brief Given a range in the target process, determines if the entire range
+  //!     is readable.
+  //!
+  //! \param[in] range The range being inspected.
+  //!
+  //! \return `true` if the range is fully readable, otherwise `false` with a
+  //!     message logged.
+  bool LoggingRangeIsFullyReadable(
+      const CheckedRange<WinVMAddress, WinVMSize>& range) const;
+
+  //! \brief Retrieves information about open handles in the target process.
+  const std::vector<Handle>& Handles() const;
+
+ private:
+  template <class Traits>
+  friend bool GetProcessBasicInformation(HANDLE process,
+                                         bool is_wow64,
+                                         ProcessInfo* process_info,
+                                         WinVMAddress* peb_address,
+                                         WinVMSize* peb_size);
+  template <class Traits>
+  friend bool ReadProcessData(HANDLE process,
+                              WinVMAddress peb_address_vmaddr,
+                              ProcessInfo* process_info);
+
+  friend bool ReadMemoryInfo(HANDLE process,
+                             bool is_64_bit,
+                             ProcessInfo* process_info);
+
+  std::vector<Handle> BuildHandleVector(HANDLE process) const;
+
+  pid_t process_id_;
+  pid_t inherited_from_process_id_;
+  HANDLE process_;
+  std::wstring command_line_;
+  WinVMAddress peb_address_;
+  WinVMSize peb_size_;
+  std::vector<Module> modules_;
+  std::vector<MEMORY_BASIC_INFORMATION64> memory_info_;
+
+  // Handles() is logically const, but updates this member on first retrieval.
+  // See https://crashpad.chromium.org/bug/9.
+  mutable std::vector<Handle> handles_;
+
+  bool is_64_bit_;
+  bool is_wow64_;
+  InitializationStateDcheck initialized_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProcessInfo);
+};
+
+//! \brief Given a memory map of a process, and a range to be read from the
+//!     target process, returns a vector of ranges, representing the readable
+//!     portions of the original range.
+//!
+//! This is a free function for testing, but prefer
+//! ProcessInfo::GetReadableRanges().
+std::vector<CheckedRange<WinVMAddress, WinVMSize>> GetReadableRangesOfMemoryMap(
+    const CheckedRange<WinVMAddress, WinVMSize>& range,
+    const std::vector<MEMORY_BASIC_INFORMATION64>& memory_info);
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_UTIL_WIN_PROCESS_INFO_H_