Update Crashpad to b4095401639ebe2ad33169e5c1d994065cbff1b8

third_party/crashpad/crashpad/util/linux/process_memory.h

Index: third_party/crashpad/crashpad/util/linux/process_memory.h
diff --git a/third_party/crashpad/crashpad/util/linux/process_memory.h b/third_party/crashpad/crashpad/util/linux/process_memory.h
new file mode 100644
index 0000000000000000000000000000000000000000..6a04dea3b3368a1524b96233ae7ae84d5634e72f
--- /dev/null
+++ b/third_party/crashpad/crashpad/util/linux/process_memory.h
@@ -0,0 +1,105 @@
+// Copyright 2017 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_LINUX_PROCESS_MEMORY_H_
+#define CRASHPAD_UTIL_LINUX_PROCESS_MEMORY_H_
+
+#include <sys/types.h>
+
+#include <string>
+
+#include "base/files/scoped_file.h"
+#include "base/macros.h"
+#include "util/linux/address_types.h"
+
+namespace crashpad {
+
+//! \brief Accesses the memory of another process.
+class ProcessMemory {
+ public:
+  ProcessMemory();
+  ~ProcessMemory();
+
+  //! \brief Initializes this object to read the memory of a process whose ID
+  //!     is \a pid.
+  //!
+  //! This method must be called successfully prior to calling any other method
+  //! in this class.
+  //!
+  //! \param[in] pid The process ID of a target process.
+  //!
+  //! \return `true` on success, `false` on failure with a message logged.
+  bool Initialize(pid_t pid);
+
+  //! \brief Copies memory from the target process into a caller-provided buffer
+  //!     in the current process.
+  //!
+  //! \param[in] address The address, in the target process' address space, of
+  //!     the memory region to copy.
+  //! \param[in] size The size, in bytes, of the memory region to copy.
+  //!     \a buffer must be at least this size.
+  //! \param[out] buffer The buffer into which the contents of the other
+  //!     process' memory will be copied.
+  //!
+  //! \return `true` on success, with \a buffer filled appropriately. `false` on
+  //!     failure, with a message logged.
+  bool Read(LinuxVMAddress address, size_t size, void* buffer) const;
+
+  //! \brief Reads a `NUL`-terminated C string from the target process into a
+  //!     string in the current process.
+  //!
+  //! The length of the string need not be known ahead of time. This method will
+  //! read contiguous memory until a `NUL` terminator is found.
+  //!
+  //! \param[in] address The address, in the target process’s address space, of
+  //!     the string to copy.
+  //! \param[out] string The string read from the other process.
+  //!
+  //! \return `true` on success, with \a string set appropriately. `false` on
+  //!     failure, with a message logged. Failures can occur, for example, when
+  //!     encountering unmapped or unreadable pages.
+  bool ReadCString(LinuxVMAddress address, std::string* string) const;
+
+  //! \brief Reads a `NUL`-terminated C string from the target process into a
+  //!     string in the current process.
+  //!
+  //! \param[in] address The address, in the target process’s address space, of
+  //!     the string to copy.
+  //! \param[in] size The maximum number of bytes to read. The string is
+  //!     required to be `NUL`-terminated within this many bytes.
+  //! \param[out] string The string read from the other process.
+  //!
+  //! \return `true` on success, with \a string set appropriately. `false` on
+  //!     failure, with a message logged. Failures can occur, for example, when
+  //!     a `NUL` terminator is not found within \a size bytes, or when
+  //!     encountering unmapped or unreadable pages.
+  bool ReadCStringSizeLimited(LinuxVMAddress address,
+                              size_t size,
+                              std::string* string) const;
+
+ private:
+  bool ReadCStringInternal(LinuxVMAddress address,
+                           bool has_size,
+                           size_t size,
+                           std::string* string) const;
+
+  base::ScopedFD mem_fd_;
+  pid_t pid_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProcessMemory);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_UTIL_LINUX_PROCESS_MEMORY_H_